Delete ctr-std

We use the rustc fork now
3 years ago · 3041fa8ef1
358 changed files with 0 additions and 103830 deletions
--- a/ctr-std/Cargo.toml
+++ b/ctr-std/Cargo.toml
@ -1,12 +0,0 @@
 [package]
 name = "std"
 version = "0.0.0"
 license = "MIT/Apache 2.0"
 [dependencies.alloc_system]
 git = "https://github.com/rust3ds/alloc_system3ds"
 [dependencies.ctru-sys]
 path = "../ctru-sys"
 default-features = false
 features = ["stdbuild"]
--- a/ctr-std/README.md
+++ b/ctr-std/README.md
@ -1,69 +0,0 @@
 A work-in-progress port of the Rust Standard Library for the Nintendo 3DS, based on [ctrulib](https://github.com/smealum/ctrulib/) and the [devkitARM](http://devkitPro.org) toolchain.
 ## Structure
 This library aims to mimick the Rust standard library's public interface as closely as possible, exposing functionality that is common between the 3DS and other platforms. System-specific functionality such as control input, save file management, GPU features, and so forth are implemented in `ctru-rs`.
 ## Working modules
 * `any`
 * `ascii`
 * `borrow`
 * `boxed`
 * `cell`
 * `char`
 * `clone`
 * `cmp`
 * `collections`
 * `convert`
 * `default`
 * `error`
 * `f32`
 * `f64`
 * `ffi`
 * `fmt`
 * `fs`        Both `sdmc:/` and `romfs:/` paths are supported in standard file operations
 * `hash`
 * `i8`
 * `i16`
 * `i32`
 * `i64`
 * `io`
 * `isize`
 * `iter`
 * `marker`
 * `mem`
 * `num`
 * `ops`
 * `option`
 * `panic`
 * `path`
 * `prelude`
 * `ptr`
 * `rc`
 * `result`
 * `slice`
 * `str`
 * `string`
 * `sync`
 * `time`
 * `thread`    Threads are able to be spawned, but without the ability to pin to a specific core or set thread priority
 * `u8`
 * `u16`
 * `u32`
 * `u64`
 * `usize`
 * `vec`
 * `heap`
 * `i128`
 * `intrinsics`
 * `raw`
 * `u128`
 # Partially working modules
 * `net`       Anything not involving IPv6 should work after initializing the `Soc` service in `ctru-rs`
 * `os`        The modules in here should work, but they aren't well-tested
 # Non-working modules
 * `env`       argc/argv can be implemented but have not been yet
 * `process`   Unable to be implemented due to platform incompatibilities
--- a/ctr-std/src/alloc.rs
+++ b/ctr-std/src/alloc.rs
@ -1,184 +0,0 @@
 // Copyright 2017 The Rust Project Developers. See the COPYRIGHT
 // file at the top-level directory of this distribution and at
 // http://rust-lang.org/COPYRIGHT.
 //
 // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
 // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 //! Memory allocation APIs
 //!
 //! In a given program, the standard library has one “global” memory allocator
 //! that is used for example by `Box<T>` and `Vec<T>`.
 //!
 //! Currently the default global allocator is unspecified.
 //! The compiler may link to a version of [jemalloc] on some platforms,
 //! but this is not guaranteed.
 //! Libraries, however, like `cdylib`s and `staticlib`s are guaranteed
 //! to use the [`System`] by default.
 //!
 //! [jemalloc]: https://github.com/jemalloc/jemalloc
 //! [`System`]: struct.System.html
 //!
 //! # The `#[global_allocator]` attribute
 //!
 //! This attribute allows configuring the choice of global allocator.
 //! You can use this to implement a completely custom global allocator
 //! to route all default allocation requests to a custom object.
 //!
 //! ```rust
 //! use std::alloc::{GlobalAlloc, System, Layout};
 //!
 //! struct MyAllocator;
 //!
 //! unsafe impl GlobalAlloc for MyAllocator {
 //!     unsafe fn alloc(&self, layout: Layout) -> *mut u8 {
 //!         System.alloc(layout)
 //!     }
 //!
 //!     unsafe fn dealloc(&self, ptr: *mut u8, layout: Layout) {
 //!         System.dealloc(ptr, layout)
 //!     }
 //! }
 //!
 //! #[global_allocator]
 //! static GLOBAL: MyAllocator = MyAllocator;
 //!
 //! fn main() {
 //!     // This `Vec` will allocate memory through `GLOBAL` above
 //!     let mut v = Vec::new();
 //!     v.push(1);
 //! }
 //! ```
 //!
 //! The attribute is used on a `static` item whose type implements the
 //! [`GlobalAlloc`] trait. This type can be provided by an external library:
 //!
 //! [`GlobalAlloc`]: ../../core/alloc/trait.GlobalAlloc.html
 //!
 //! ```rust,ignore (demonstrates crates.io usage)
 //! extern crate jemallocator;
 //!
 //! use jemallocator::Jemalloc;
 //!
 //! #[global_allocator]
 //! static GLOBAL: Jemalloc = Jemalloc;
 //!
 //! fn main() {}
 //! ```
 //!
 //! The `#[global_allocator]` can only be used once in a crate
 //! or its recursive dependencies.
 #![stable(feature = "alloc_module", since = "1.28.0")]
 use core::sync::atomic::{AtomicPtr, Ordering};
 use core::{mem, ptr};
 use sys_common::util::dumb_print;
 #[stable(feature = "alloc_module", since = "1.28.0")]
 #[doc(inline)]
 pub use alloc_crate::alloc::*;
 #[stable(feature = "alloc_system_type", since = "1.28.0")]
 #[doc(inline)]
 pub use alloc_system::System;
 static HOOK: AtomicPtr<()> = AtomicPtr::new(ptr::null_mut());
 /// Registers a custom allocation error hook, replacing any that was previously registered.
 ///
 /// The allocation error hook is invoked when an infallible memory allocation fails, before
 /// the runtime aborts. The default hook prints a message to standard error,
 /// but this behavior can be customized with the [`set_alloc_error_hook`] and
 /// [`take_alloc_error_hook`] functions.
 ///
 /// The hook is provided with a `Layout` struct which contains information
 /// about the allocation that failed.
 ///
 /// The allocation error hook is a global resource.
 #[unstable(feature = "alloc_error_hook", issue = "51245")]
 pub fn set_alloc_error_hook(hook: fn(Layout)) {
    HOOK.store(hook as *mut (), Ordering::SeqCst);
 }
 /// Unregisters the current allocation error hook, returning it.
 ///
 /// *See also the function [`set_alloc_error_hook`].*
 ///
 /// If no custom hook is registered, the default hook will be returned.
 #[unstable(feature = "alloc_error_hook", issue = "51245")]
 pub fn take_alloc_error_hook() -> fn(Layout) {
    let hook = HOOK.swap(ptr::null_mut(), Ordering::SeqCst);
    if hook.is_null() {
        default_alloc_error_hook
    } else {
        unsafe { mem::transmute(hook) }
    }
 }
 fn default_alloc_error_hook(layout: Layout) {
    dumb_print(format_args!("memory allocation of {} bytes failed", layout.size()));
 }
 #[cfg(not(test))]
 #[doc(hidden)]
 #[alloc_error_handler]
 #[unstable(feature = "alloc_internals", issue = "0")]
 pub fn rust_oom(layout: Layout) -> ! {
    let hook = HOOK.load(Ordering::SeqCst);
    let hook: fn(Layout) = if hook.is_null() {
        default_alloc_error_hook
    } else {
        unsafe { mem::transmute(hook) }
    };
    hook(layout);
    unsafe { ::sys::abort_internal(); }
 }
 #[cfg(not(test))]
 #[doc(hidden)]
 #[allow(unused_attributes)]
 #[unstable(feature = "alloc_internals", issue = "0")]
 pub mod __default_lib_allocator {
    use super::{System, Layout, GlobalAlloc};
    // for symbol names src/librustc/middle/allocator.rs
    // for signatures src/librustc_allocator/lib.rs
    // linkage directives are provided as part of the current compiler allocator
    // ABI
    #[no_mangle]
    #[rustc_std_internal_symbol]
    pub unsafe extern fn __rdl_alloc(size: usize, align: usize) -> *mut u8 {
        let layout = Layout::from_size_align_unchecked(size, align);
        System.alloc(layout)
    }
    #[no_mangle]
    #[rustc_std_internal_symbol]
    pub unsafe extern fn __rdl_dealloc(ptr: *mut u8,
                                       size: usize,
                                       align: usize) {
        System.dealloc(ptr, Layout::from_size_align_unchecked(size, align))
    }
    #[no_mangle]
    #[rustc_std_internal_symbol]
    pub unsafe extern fn __rdl_realloc(ptr: *mut u8,
                                       old_size: usize,
                                       align: usize,
                                       new_size: usize) -> *mut u8 {
        let old_layout = Layout::from_size_align_unchecked(old_size, align);
        System.realloc(ptr, old_layout, new_size)
    }
    #[no_mangle]
    #[rustc_std_internal_symbol]
    pub unsafe extern fn __rdl_alloc_zeroed(size: usize, align: usize) -> *mut u8 {
        let layout = Layout::from_size_align_unchecked(size, align);
        System.alloc_zeroed(layout)
    }
 }
--- a/ctr-std/src/ascii.rs
+++ b/ctr-std/src/ascii.rs
@ -1,211 +0,0 @@
 // Copyright 2013-2014 The Rust Project Developers. See the COPYRIGHT
 // file at the top-level directory of this distribution and at
 // http://rust-lang.org/COPYRIGHT.
 //
 // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
 // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 //! Operations on ASCII strings and characters.
 //!
 //! Most string operations in Rust act on UTF-8 strings. However, at times it
 //! makes more sense to only consider the ASCII character set for a specific
 //! operation.
 //!
 //! The [`AsciiExt`] trait provides methods that allow for character
 //! operations that only act on the ASCII subset and leave non-ASCII characters
 //! alone.
 //!
 //! The [`escape_default`] function provides an iterator over the bytes of an
 //! escaped version of the character given.
 //!
 //! [`AsciiExt`]: trait.AsciiExt.html
 //! [`escape_default`]: fn.escape_default.html
 #![stable(feature = "rust1", since = "1.0.0")]
 #[stable(feature = "rust1", since = "1.0.0")]
 pub use core::ascii::{EscapeDefault, escape_default};
 /// Extension methods for ASCII-subset only operations.
 ///
 /// Be aware that operations on seemingly non-ASCII characters can sometimes
 /// have unexpected results. Consider this example:
 ///
 /// ```
 /// use std::ascii::AsciiExt;
 ///
 /// assert_eq!(AsciiExt::to_ascii_uppercase("café"), "CAFÉ");
 /// assert_eq!(AsciiExt::to_ascii_uppercase("café"), "CAFé");
 /// ```
 ///
 /// In the first example, the lowercased string is represented `"cafe\u{301}"`
 /// (the last character is an acute accent [combining character]). Unlike the
 /// other characters in the string, the combining character will not get mapped
 /// to an uppercase variant, resulting in `"CAFE\u{301}"`. In the second
 /// example, the lowercased string is represented `"caf\u{e9}"` (the last
 /// character is a single Unicode character representing an 'e' with an acute
 /// accent). Since the last character is defined outside the scope of ASCII,
 /// it will not get mapped to an uppercase variant, resulting in `"CAF\u{e9}"`.
 ///
 /// [combining character]: https://en.wikipedia.org/wiki/Combining_character
 #[stable(feature = "rust1", since = "1.0.0")]
 #[rustc_deprecated(since = "1.26.0", reason = "use inherent methods instead")]
 pub trait AsciiExt {
    /// Container type for copied ASCII characters.
    #[stable(feature = "rust1", since = "1.0.0")]
    type Owned;
    /// Checks if the value is within the ASCII range.
    ///
    /// # Note
    ///
    /// This method will be deprecated in favor of the identically-named
    /// inherent methods on `u8`, `char`, `[u8]` and `str`.
    #[stable(feature = "rust1", since = "1.0.0")]
    fn is_ascii(&self) -> bool;
    /// Makes a copy of the value in its ASCII upper case equivalent.
    ///
    /// ASCII letters 'a' to 'z' are mapped to 'A' to 'Z',
    /// but non-ASCII letters are unchanged.
    ///
    /// To uppercase the value in-place, use [`make_ascii_uppercase`].
    ///
    /// To uppercase ASCII characters in addition to non-ASCII characters, use
    /// [`str::to_uppercase`].
    ///
    /// # Note
    ///
    /// This method will be deprecated in favor of the identically-named
    /// inherent methods on `u8`, `char`, `[u8]` and `str`.
    ///
    /// [`make_ascii_uppercase`]: #tymethod.make_ascii_uppercase
    /// [`str::to_uppercase`]: ../primitive.str.html#method.to_uppercase
    #[stable(feature = "rust1", since = "1.0.0")]
    #[allow(deprecated)]
    fn to_ascii_uppercase(&self) -> Self::Owned;
    /// Makes a copy of the value in its ASCII lower case equivalent.
    ///
    /// ASCII letters 'A' to 'Z' are mapped to 'a' to 'z',
    /// but non-ASCII letters are unchanged.
    ///
    /// To lowercase the value in-place, use [`make_ascii_lowercase`].
    ///
    /// To lowercase ASCII characters in addition to non-ASCII characters, use
    /// [`str::to_lowercase`].
    ///
    /// # Note
    ///
    /// This method will be deprecated in favor of the identically-named
    /// inherent methods on `u8`, `char`, `[u8]` and `str`.
    ///
    /// [`make_ascii_lowercase`]: #tymethod.make_ascii_lowercase
    /// [`str::to_lowercase`]: ../primitive.str.html#method.to_lowercase
    #[stable(feature = "rust1", since = "1.0.0")]
    #[allow(deprecated)]
    fn to_ascii_lowercase(&self) -> Self::Owned;
    /// Checks that two values are an ASCII case-insensitive match.
    ///
    /// Same as `to_ascii_lowercase(a) == to_ascii_lowercase(b)`,
    /// but without allocating and copying temporaries.
    ///
    /// # Note
    ///
    /// This method will be deprecated in favor of the identically-named
    /// inherent methods on `u8`, `char`, `[u8]` and `str`.
    #[stable(feature = "rust1", since = "1.0.0")]
    fn eq_ignore_ascii_case(&self, other: &Self) -> bool;
    /// Converts this type to its ASCII upper case equivalent in-place.
    ///
    /// ASCII letters 'a' to 'z' are mapped to 'A' to 'Z',
    /// but non-ASCII letters are unchanged.
    ///
    /// To return a new uppercased value without modifying the existing one, use
    /// [`to_ascii_uppercase`].
    ///
    /// # Note
    ///
    /// This method will be deprecated in favor of the identically-named
    /// inherent methods on `u8`, `char`, `[u8]` and `str`.
    ///
    /// [`to_ascii_uppercase`]: #tymethod.to_ascii_uppercase
    #[stable(feature = "ascii", since = "1.9.0")]
    fn make_ascii_uppercase(&mut self);
    /// Converts this type to its ASCII lower case equivalent in-place.
    ///
    /// ASCII letters 'A' to 'Z' are mapped to 'a' to 'z',
    /// but non-ASCII letters are unchanged.
    ///
    /// To return a new lowercased value without modifying the existing one, use
    /// [`to_ascii_lowercase`].
    ///
    /// # Note
    ///
    /// This method will be deprecated in favor of the identically-named
    /// inherent methods on `u8`, `char`, `[u8]` and `str`.
    ///
    /// [`to_ascii_lowercase`]: #tymethod.to_ascii_lowercase
    #[stable(feature = "ascii", since = "1.9.0")]
    fn make_ascii_lowercase(&mut self);
 }
 macro_rules! delegating_ascii_methods {
    () => {
        #[inline]
        fn is_ascii(&self) -> bool { self.is_ascii() }
        #[inline]
        fn to_ascii_uppercase(&self) -> Self::Owned { self.to_ascii_uppercase() }
        #[inline]
        fn to_ascii_lowercase(&self) -> Self::Owned { self.to_ascii_lowercase() }
        #[inline]
        fn eq_ignore_ascii_case(&self, o: &Self) -> bool { self.eq_ignore_ascii_case(o) }
        #[inline]
        fn make_ascii_uppercase(&mut self) { self.make_ascii_uppercase(); }
        #[inline]
        fn make_ascii_lowercase(&mut self) { self.make_ascii_lowercase(); }
    }
 }
 #[stable(feature = "rust1", since = "1.0.0")]
 #[allow(deprecated)]
 impl AsciiExt for u8 {
    type Owned = u8;
    delegating_ascii_methods!();
 }
 #[stable(feature = "rust1", since = "1.0.0")]
 #[allow(deprecated)]
 impl AsciiExt for char {
    type Owned = char;
    delegating_ascii_methods!();
 }
 #[stable(feature = "rust1", since = "1.0.0")]
 #[allow(deprecated)]
 impl AsciiExt for [u8] {
    type Owned = Vec<u8>;
    delegating_ascii_methods!();
 }
 #[stable(feature = "rust1", since = "1.0.0")]
 #[allow(deprecated)]
 impl AsciiExt for str {
    type Owned = String;
    delegating_ascii_methods!();
 }
--- a/ctr-std/src/build.rs
+++ b/ctr-std/src/build.rs
@ -1,134 +0,0 @@
 // Copyright 2015 The Rust Project Developers. See the COPYRIGHT
 // file at the top-level directory of this distribution and at
 // http://rust-lang.org/COPYRIGHT.
 //
 // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
 // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 #![deny(warnings)]
 extern crate build_helper;
 extern crate cc;
 use build_helper::native_lib_boilerplate;
 use std::env;
 use std::fs::File;
 fn main() {
    let target = env::var("TARGET").expect("TARGET was not set");
    if cfg!(feature = "backtrace") &&
        !target.contains("cloudabi") &&
        !target.contains("emscripten") &&
        !target.contains("msvc") &&
        !target.contains("wasm32")
    {
        let _ = build_libbacktrace(&target);
    }
    if target.contains("linux") {
        if target.contains("android") {
            println!("cargo:rustc-link-lib=dl");
            println!("cargo:rustc-link-lib=log");
            println!("cargo:rustc-link-lib=gcc");
        } else if !target.contains("musl") {
            println!("cargo:rustc-link-lib=dl");
            println!("cargo:rustc-link-lib=rt");
            println!("cargo:rustc-link-lib=pthread");
        }
    } else if target.contains("freebsd") {
        println!("cargo:rustc-link-lib=execinfo");
        println!("cargo:rustc-link-lib=pthread");
    } else if target.contains("dragonfly") || target.contains("bitrig") ||
              target.contains("netbsd") || target.contains("openbsd") {
        println!("cargo:rustc-link-lib=pthread");
    } else if target.contains("solaris") {
        println!("cargo:rustc-link-lib=socket");
        println!("cargo:rustc-link-lib=posix4");
        println!("cargo:rustc-link-lib=pthread");
        println!("cargo:rustc-link-lib=resolv");
    } else if target.contains("apple-darwin") {
        println!("cargo:rustc-link-lib=System");
        // res_init and friends require -lresolv on macOS/iOS.
        // See #41582 and http://blog.achernya.com/2013/03/os-x-has-silly-libsystem.html
        println!("cargo:rustc-link-lib=resolv");
    } else if target.contains("apple-ios") {
        println!("cargo:rustc-link-lib=System");
        println!("cargo:rustc-link-lib=objc");
        println!("cargo:rustc-link-lib=framework=Security");
        println!("cargo:rustc-link-lib=framework=Foundation");
        println!("cargo:rustc-link-lib=resolv");
    } else if target.contains("windows") {
        println!("cargo:rustc-link-lib=advapi32");
        println!("cargo:rustc-link-lib=ws2_32");
        println!("cargo:rustc-link-lib=userenv");
        println!("cargo:rustc-link-lib=shell32");
    } else if target.contains("fuchsia") {
        println!("cargo:rustc-link-lib=zircon");
        println!("cargo:rustc-link-lib=fdio");
    } else if target.contains("cloudabi") {
        if cfg!(feature = "backtrace") {
            println!("cargo:rustc-link-lib=unwind");
        }
        println!("cargo:rustc-link-lib=c");
        println!("cargo:rustc-link-lib=compiler_rt");
    }
 }
 fn build_libbacktrace(target: &str) -> Result<(), ()> {
    let native = native_lib_boilerplate("libbacktrace", "libbacktrace", "backtrace", "")?;
    let mut build = cc::Build::new();
    build
        .flag("-fvisibility=hidden")
        .include("../libbacktrace")
        .include(&native.out_dir)
        .out_dir(&native.out_dir)
        .warnings(false)
        .file("../libbacktrace/alloc.c")
        .file("../libbacktrace/backtrace.c")
        .file("../libbacktrace/dwarf.c")
        .file("../libbacktrace/fileline.c")
        .file("../libbacktrace/posix.c")
        .file("../libbacktrace/read.c")
        .file("../libbacktrace/sort.c")
        .file("../libbacktrace/state.c");
    if target.contains("darwin") {
        build.file("../libbacktrace/macho.c");
    } else if target.contains("windows") {
        build.file("../libbacktrace/pecoff.c");
    } else {
        build.file("../libbacktrace/elf.c");
        let pointer_width = env::var("CARGO_CFG_TARGET_POINTER_WIDTH").unwrap();
        if pointer_width == "64" {
            build.define("BACKTRACE_ELF_SIZE", "64");
        } else {
            build.define("BACKTRACE_ELF_SIZE", "32");
        }
    }
    File::create(native.out_dir.join("backtrace-supported.h")).unwrap();
    build.define("BACKTRACE_SUPPORTED", "1");
    build.define("BACKTRACE_USES_MALLOC", "1");
    build.define("BACKTRACE_SUPPORTS_THREADS", "0");
    build.define("BACKTRACE_SUPPORTS_DATA", "0");
    File::create(native.out_dir.join("config.h")).unwrap();
    if !target.contains("apple-ios") &&
       !target.contains("solaris") &&
       !target.contains("redox") &&
       !target.contains("android") &&
       !target.contains("haiku") {
        build.define("HAVE_DL_ITERATE_PHDR", "1");
    }
    build.define("_GNU_SOURCE", "1");
    build.define("_LARGE_FILES", "1");
    build.compile("backtrace");
    Ok(())
 }
--- a/ctr-std/src/collections/hash/bench.rs
+++ b/ctr-std/src/collections/hash/bench.rs
@ -1,128 +0,0 @@
 // Copyright 2014 The Rust Project Developers. See the COPYRIGHT
 // file at the top-level directory of this distribution and at
 // http://rust-lang.org/COPYRIGHT.
 //
 // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
 // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 #![cfg(test)]
 extern crate test;
 use self::test::Bencher;
 #[bench]
 fn new_drop(b: &mut Bencher) {
    use super::map::HashMap;
    b.iter(|| {
        let m: HashMap<i32, i32> = HashMap::new();
        assert_eq!(m.len(), 0);
    })
 }
 #[bench]
 fn new_insert_drop(b: &mut Bencher) {
    use super::map::HashMap;
    b.iter(|| {
        let mut m = HashMap::new();
        m.insert(0, 0);
        assert_eq!(m.len(), 1);
    })
 }
 #[bench]
 fn grow_by_insertion(b: &mut Bencher) {
    use super::map::HashMap;
    let mut m = HashMap::new();
    for i in 1..1001 {
        m.insert(i, i);
    }
    let mut k = 1001;
    b.iter(|| {
        m.insert(k, k);
        k += 1;
    });
 }
 #[bench]
 fn find_existing(b: &mut Bencher) {
    use super::map::HashMap;
    let mut m = HashMap::new();
    for i in 1..1001 {
        m.insert(i, i);
    }
    b.iter(|| {
        for i in 1..1001 {
            m.contains_key(&i);
        }
    });
 }
 #[bench]
 fn find_nonexisting(b: &mut Bencher) {
    use super::map::HashMap;
    let mut m = HashMap::new();
    for i in 1..1001 {
        m.insert(i, i);
    }
    b.iter(|| {
        for i in 1001..2001 {
            m.contains_key(&i);
        }
    });
 }
 #[bench]
 fn hashmap_as_queue(b: &mut Bencher) {
    use super::map::HashMap;
    let mut m = HashMap::new();
    for i in 1..1001 {
        m.insert(i, i);
    }
    let mut k = 1;
    b.iter(|| {
        m.remove(&k);
        m.insert(k + 1000, k + 1000);
        k += 1;
    });
 }
 #[bench]
 fn get_remove_insert(b: &mut Bencher) {
    use super::map::HashMap;
    let mut m = HashMap::new();
    for i in 1..1001 {
        m.insert(i, i);
    }
    let mut k = 1;
    b.iter(|| {
        m.get(&(k + 400));
        m.get(&(k + 2000));
        m.remove(&k);
        m.insert(k + 1000, k + 1000);
        k += 1;
    })
 }
--- a/ctr-std/src/collections/hash/map.rs
+++ b/ctr-std/src/collections/hash/map.rs
--- a/ctr-std/src/collections/hash/mod.rs
+++ b/ctr-std/src/collections/hash/mod.rs
@ -1,24 +0,0 @@
 // Copyright 2014 The Rust Project Developers. See the COPYRIGHT
 // file at the top-level directory of this distribution and at
 // http://rust-lang.org/COPYRIGHT.
 //
 // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
 // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 //! Unordered containers, implemented as hash-tables
 mod bench;
 mod table;
 pub mod map;
 pub mod set;
 trait Recover<Q: ?Sized> {
    type Key;
    fn get(&self, key: &Q) -> Option<&Self::Key>;
    fn take(&mut self, key: &Q) -> Option<Self::Key>;
    fn replace(&mut self, key: Self::Key) -> Option<Self::Key>;
 }
--- a/ctr-std/src/collections/hash/set.rs
+++ b/ctr-std/src/collections/hash/set.rs
--- a/ctr-std/src/collections/hash/table.rs
+++ b/ctr-std/src/collections/hash/table.rs
--- a/ctr-std/src/collections/mod.rs
+++ b/ctr-std/src/collections/mod.rs
@ -1,457 +0,0 @@
 // Copyright 2013-2014 The Rust Project Developers. See the COPYRIGHT
 // file at the top-level directory of this distribution and at
 // http://rust-lang.org/COPYRIGHT.
 //
 // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
 // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 //! Collection types.
 //!
 //! Rust's standard collection library provides efficient implementations of the
 //! most common general purpose programming data structures. By using the
 //! standard implementations, it should be possible for two libraries to
 //! communicate without significant data conversion.
 //!
 //! To get this out of the way: you should probably just use [`Vec`] or [`HashMap`].
 //! These two collections cover most use cases for generic data storage and
 //! processing. They are exceptionally good at doing what they do. All the other
 //! collections in the standard library have specific use cases where they are
 //! the optimal choice, but these cases are borderline *niche* in comparison.
 //! Even when `Vec` and `HashMap` are technically suboptimal, they're probably a
 //! good enough choice to get started.
 //!
 //! Rust's collections can be grouped into four major categories:
 //!
 //! * Sequences: [`Vec`], [`VecDeque`], [`LinkedList`]
 //! * Maps: [`HashMap`], [`BTreeMap`]
 //! * Sets: [`HashSet`], [`BTreeSet`]
 //! * Misc: [`BinaryHeap`]
 //!
 //! # When Should You Use Which Collection?
 //!
 //! These are fairly high-level and quick break-downs of when each collection
 //! should be considered. Detailed discussions of strengths and weaknesses of
 //! individual collections can be found on their own documentation pages.
 //!
 //! ### Use a `Vec` when:
 //! * You want to collect items up to be processed or sent elsewhere later, and
 //!   don't care about any properties of the actual values being stored.
 //! * You want a sequence of elements in a particular order, and will only be
 //!   appending to (or near) the end.
 //! * You want a stack.
 //! * You want a resizable array.
 //! * You want a heap-allocated array.
 //!
 //! ### Use a `VecDeque` when:
 //! * You want a [`Vec`] that supports efficient insertion at both ends of the
 //!   sequence.
 //! * You want a queue.
 //! * You want a double-ended queue (deque).
 //!
 //! ### Use a `LinkedList` when:
 //! * You want a [`Vec`] or [`VecDeque`] of unknown size, and can't tolerate
 //!   amortization.
 //! * You want to efficiently split and append lists.
 //! * You are *absolutely* certain you *really*, *truly*, want a doubly linked
 //!   list.
 //!
 //! ### Use a `HashMap` when:
 //! * You want to associate arbitrary keys with an arbitrary value.
 //! * You want a cache.
 //! * You want a map, with no extra functionality.
 //!
 //! ### Use a `BTreeMap` when:
 //! * You want a map sorted by its keys.
 //! * You want to be able to get a range of entries on-demand.
 //! * You're interested in what the smallest or largest key-value pair is.
 //! * You want to find the largest or smallest key that is smaller or larger
 //!   than something.
 //!
 //! ### Use the `Set` variant of any of these `Map`s when:
 //! * You just want to remember which keys you've seen.
 //! * There is no meaningful value to associate with your keys.
 //! * You just want a set.
 //!
 //! ### Use a `BinaryHeap` when:
 //!
 //! * You want to store a bunch of elements, but only ever want to process the
 //!   "biggest" or "most important" one at any given time.
 //! * You want a priority queue.
 //!
 //! # Performance
 //!
 //! Choosing the right collection for the job requires an understanding of what
 //! each collection is good at. Here we briefly summarize the performance of
 //! different collections for certain important operations. For further details,
 //! see each type's documentation, and note that the names of actual methods may
 //! differ from the tables below on certain collections.
 //!
 //! Throughout the documentation, we will follow a few conventions. For all
 //! operations, the collection's size is denoted by n. If another collection is
 //! involved in the operation, it contains m elements. Operations which have an
 //! *amortized* cost are suffixed with a `*`. Operations with an *expected*
 //! cost are suffixed with a `~`.
 //!
 //! All amortized costs are for the potential need to resize when capacity is
 //! exhausted. If a resize occurs it will take O(n) time. Our collections never
 //! automatically shrink, so removal operations aren't amortized. Over a
 //! sufficiently large series of operations, the average cost per operation will
 //! deterministically equal the given cost.
 //!
 //! Only [`HashMap`] has expected costs, due to the probabilistic nature of hashing.
 //! It is theoretically possible, though very unlikely, for [`HashMap`] to
 //! experience worse performance.
 //!
 //! ## Sequences
 //!
 //! |                | get(i)         | insert(i)       | remove(i)      | append | split_off(i)   |
 //! |----------------|----------------|-----------------|----------------|--------|----------------|
 //! | [`Vec`]        | O(1)           | O(n-i)*         | O(n-i)         | O(m)*  | O(n-i)         |
 //! | [`VecDeque`]   | O(1)           | O(min(i, n-i))* | O(min(i, n-i)) | O(m)*  | O(min(i, n-i)) |
 //! | [`LinkedList`] | O(min(i, n-i)) | O(min(i, n-i))  | O(min(i, n-i)) | O(1)   | O(min(i, n-i)) |
 //!
 //! Note that where ties occur, [`Vec`] is generally going to be faster than [`VecDeque`], and
 //! [`VecDeque`] is generally going to be faster than [`LinkedList`].
 //!
 //! ## Maps
 //!
 //! For Sets, all operations have the cost of the equivalent Map operation.
 //!
 //! |              | get       | insert   | remove   | predecessor | append |
 //! |--------------|-----------|----------|----------|-------------|--------|
 //! | [`HashMap`]  | O(1)~     | O(1)~*   | O(1)~    | N/A         | N/A    |
 //! | [`BTreeMap`] | O(log n)  | O(log n) | O(log n) | O(log n)    | O(n+m) |
 //!
 //! # Correct and Efficient Usage of Collections
 //!
 //! Of course, knowing which collection is the right one for the job doesn't
 //! instantly permit you to use it correctly. Here are some quick tips for
 //! efficient and correct usage of the standard collections in general. If
 //! you're interested in how to use a specific collection in particular, consult
 //! its documentation for detailed discussion and code examples.
 //!
 //! ## Capacity Management
 //!
 //! Many collections provide several constructors and methods that refer to
 //! "capacity". These collections are generally built on top of an array.
 //! Optimally, this array would be exactly the right size to fit only the
 //! elements stored in the collection, but for the collection to do this would
 //! be very inefficient. If the backing array was exactly the right size at all
 //! times, then every time an element is inserted, the collection would have to
 //! grow the array to fit it. Due to the way memory is allocated and managed on
 //! most computers, this would almost surely require allocating an entirely new
 //! array and copying every single element from the old one into the new one.
 //! Hopefully you can see that this wouldn't be very efficient to do on every
 //! operation.
 //!
 //! Most collections therefore use an *amortized* allocation strategy. They
 //! generally let themselves have a fair amount of unoccupied space so that they
 //! only have to grow on occasion. When they do grow, they allocate a
 //! substantially larger array to move the elements into so that it will take a
 //! while for another grow to be required. While this strategy is great in
 //! general, it would be even better if the collection *never* had to resize its
 //! backing array. Unfortunately, the collection itself doesn't have enough
 //! information to do this itself. Therefore, it is up to us programmers to give
 //! it hints.
 //!
 //! Any `with_capacity` constructor will instruct the collection to allocate
 //! enough space for the specified number of elements. Ideally this will be for
 //! exactly that many elements, but some implementation details may prevent
 //! this. [`Vec`] and [`VecDeque`] can be relied on to allocate exactly the
 //! requested amount, though. Use `with_capacity` when you know exactly how many
 //! elements will be inserted, or at least have a reasonable upper-bound on that
 //! number.
 //!
 //! When anticipating a large influx of elements, the `reserve` family of
 //! methods can be used to hint to the collection how much room it should make
 //! for the coming items. As with `with_capacity`, the precise behavior of
 //! these methods will be specific to the collection of interest.
 //!
 //! For optimal performance, collections will generally avoid shrinking
 //! themselves. If you believe that a collection will not soon contain any more
 //! elements, or just really need the memory, the `shrink_to_fit` method prompts
 //! the collection to shrink the backing array to the minimum size capable of
 //! holding its elements.
 //!
 //! Finally, if ever you're interested in what the actual capacity of the
 //! collection is, most collections provide a `capacity` method to query this
 //! information on demand. This can be useful for debugging purposes, or for
 //! use with the `reserve` methods.
 //!
 //! ## Iterators
 //!
 //! Iterators are a powerful and robust mechanism used throughout Rust's
 //! standard libraries. Iterators provide a sequence of values in a generic,
 //! safe, efficient and convenient way. The contents of an iterator are usually
 //! *lazily* evaluated, so that only the values that are actually needed are
 //! ever actually produced, and no allocation need be done to temporarily store
 //! them. Iterators are primarily consumed using a `for` loop, although many
 //! functions also take iterators where a collection or sequence of values is
 //! desired.
 //!
 //! All of the standard collections provide several iterators for performing
 //! bulk manipulation of their contents. The three primary iterators almost
 //! every collection should provide are `iter`, `iter_mut`, and `into_iter`.
 //! Some of these are not provided on collections where it would be unsound or
 //! unreasonable to provide them.
 //!
 //! `iter` provides an iterator of immutable references to all the contents of a
 //! collection in the most "natural" order. For sequence collections like [`Vec`],
 //! this means the items will be yielded in increasing order of index starting
 //! at 0. For ordered collections like [`BTreeMap`], this means that the items
 //! will be yielded in sorted order. For unordered collections like [`HashMap`],
 //! the items will be yielded in whatever order the internal representation made
 //! most convenient. This is great for reading through all the contents of the
 //! collection.
 //!
 //! ```
 //! let vec = vec![1, 2, 3, 4];
 //! for x in vec.iter() {
 //!    println!("vec contained {}", x);
 //! }
 //! ```
 //!
 //! `iter_mut` provides an iterator of *mutable* references in the same order as
 //! `iter`. This is great for mutating all the contents of the collection.
 //!
 //! ```
 //! let mut vec = vec![1, 2, 3, 4];
 //! for x in vec.iter_mut() {
 //!    *x += 1;
 //! }
 //! ```
 //!
 //! `into_iter` transforms the actual collection into an iterator over its
 //! contents by-value. This is great when the collection itself is no longer
 //! needed, and the values are needed elsewhere. Using `extend` with `into_iter`
 //! is the main way that contents of one collection are moved into another.
 //! `extend` automatically calls `into_iter`, and takes any `T: `[`IntoIterator`].
 //! Calling `collect` on an iterator itself is also a great way to convert one
 //! collection into another. Both of these methods should internally use the
 //! capacity management tools discussed in the previous section to do this as
 //! efficiently as possible.
 //!
 //! ```
 //! let mut vec1 = vec![1, 2, 3, 4];
 //! let vec2 = vec![10, 20, 30, 40];
 //! vec1.extend(vec2);
 //! ```
 //!
 //! ```
 //! use std::collections::VecDeque;
 //!
 //! let vec = vec![1, 2, 3, 4];
 //! let buf: VecDeque<_> = vec.into_iter().collect();
 //! ```
 //!
 //! Iterators also provide a series of *adapter* methods for performing common
 //! threads to sequences. Among the adapters are functional favorites like `map`,
 //! `fold`, `skip` and `take`. Of particular interest to collections is the
 //! `rev` adapter, that reverses any iterator that supports this operation. Most
 //! collections provide reversible iterators as the way to iterate over them in
 //! reverse order.
 //!
 //! ```
 //! let vec = vec![1, 2, 3, 4];
 //! for x in vec.iter().rev() {
 //!    println!("vec contained {}", x);
 //! }
 //! ```
 //!
 //! Several other collection methods also return iterators to yield a sequence
 //! of results but avoid allocating an entire collection to store the result in.
 //! This provides maximum flexibility as `collect` or `extend` can be called to
 //! "pipe" the sequence into any collection if desired. Otherwise, the sequence
 //! can be looped over with a `for` loop. The iterator can also be discarded
 //! after partial use, preventing the computation of the unused items.
 //!
 //! ## Entries
 //!
 //! The `entry` API is intended to provide an efficient mechanism for
 //! manipulating the contents of a map conditionally on the presence of a key or
 //! not. The primary motivating use case for this is to provide efficient
 //! accumulator maps. For instance, if one wishes to maintain a count of the
 //! number of times each key has been seen, they will have to perform some
 //! conditional logic on whether this is the first time the key has been seen or
 //! not. Normally, this would require a `find` followed by an `insert`,
 //! effectively duplicating the search effort on each insertion.
 //!
 //! When a user calls `map.entry(&key)`, the map will search for the key and
 //! then yield a variant of the `Entry` enum.
 //!
 //! If a `Vacant(entry)` is yielded, then the key *was not* found. In this case
 //! the only valid operation is to `insert` a value into the entry. When this is
 //! done, the vacant entry is consumed and converted into a mutable reference to
 //! the value that was inserted. This allows for further manipulation of the
 //! value beyond the lifetime of the search itself. This is useful if complex
 //! logic needs to be performed on the value regardless of whether the value was
 //! just inserted.
 //!
 //! If an `Occupied(entry)` is yielded, then the key *was* found. In this case,
 //! the user has several options: they can `get`, `insert` or `remove` the
 //! value of the occupied entry. Additionally, they can convert the occupied
 //! entry into a mutable reference to its value, providing symmetry to the
 //! vacant `insert` case.
 //!
 //! ### Examples
 //!
 //! Here are the two primary ways in which `entry` is used. First, a simple
 //! example where the logic performed on the values is trivial.
 //!
 //! #### Counting the number of times each character in a string occurs
 //!
 //! ```
 //! use std::collections::btree_map::BTreeMap;
 //!
 //! let mut count = BTreeMap::new();
 //! let message = "she sells sea shells by the sea shore";
 //!
 //! for c in message.chars() {
 //!     *count.entry(c).or_insert(0) += 1;
 //! }
 //!
 //! assert_eq!(count.get(&'s'), Some(&8));
 //!
 //! println!("Number of occurrences of each character");
 //! for (char, count) in &count {
 //!     println!("{}: {}", char, count);
 //! }
 //! ```
 //!
 //! When the logic to be performed on the value is more complex, we may simply
 //! use the `entry` API to ensure that the value is initialized and perform the
 //! logic afterwards.
 //!
 //! #### Tracking the inebriation of customers at a bar
 //!
 //! ```
 //! use std::collections::btree_map::BTreeMap;
 //!
 //! // A client of the bar. They have a blood alcohol level.
 //! struct Person { blood_alcohol: f32 }
 //!
 //! // All the orders made to the bar, by client id.
 //! let orders = vec![1,2,1,2,3,4,1,2,2,3,4,1,1,1];
 //!
 //! // Our clients.
 //! let mut blood_alcohol = BTreeMap::new();
 //!
 //! for id in orders {
 //!     // If this is the first time we've seen this customer, initialize them
 //!     // with no blood alcohol. Otherwise, just retrieve them.
 //!     let person = blood_alcohol.entry(id).or_insert(Person { blood_alcohol: 0.0 });
 //!
 //!     // Reduce their blood alcohol level. It takes time to order and drink a beer!
 //!     person.blood_alcohol *= 0.9;
 //!
 //!     // Check if they're sober enough to have another beer.
 //!     if person.blood_alcohol > 0.3 {
 //!         // Too drunk... for now.
 //!         println!("Sorry {}, I have to cut you off", id);
 //!     } else {
 //!         // Have another!
 //!         person.blood_alcohol += 0.1;
 //!     }
 //! }
 //! ```
 //!
 //! # Insert and complex keys
 //!
 //! If we have a more complex key, calls to `insert` will
 //! not update the value of the key. For example:
 //!
 //! ```
 //! use std::cmp::Ordering;
 //! use std::collections::BTreeMap;
 //! use std::hash::{Hash, Hasher};
 //!
 //! #[derive(Debug)]
 //! struct Foo {
 //!     a: u32,
 //!     b: &'static str,
 //! }
 //!
 //! // we will compare `Foo`s by their `a` value only.
 //! impl PartialEq for Foo {
 //!     fn eq(&self, other: &Self) -> bool { self.a == other.a }
 //! }
 //!
 //! impl Eq for Foo {}
 //!
 //! // we will hash `Foo`s by their `a` value only.
 //! impl Hash for Foo {
 //!     fn hash<H: Hasher>(&self, h: &mut H) { self.a.hash(h); }
 //! }
 //!
 //! impl PartialOrd for Foo {
 //!     fn partial_cmp(&self, other: &Self) -> Option<Ordering> { self.a.partial_cmp(&other.a) }
 //! }
 //!
 //! impl Ord for Foo {
 //!     fn cmp(&self, other: &Self) -> Ordering { self.a.cmp(&other.a) }
 //! }
 //!
 //! let mut map = BTreeMap::new();
 //! map.insert(Foo { a: 1, b: "baz" }, 99);
 //!
 //! // We already have a Foo with an a of 1, so this will be updating the value.
 //! map.insert(Foo { a: 1, b: "xyz" }, 100);
 //!
 //! // The value has been updated...
 //! assert_eq!(map.values().next().unwrap(), &100);
 //!
 //! // ...but the key hasn't changed. b is still "baz", not "xyz".
 //! assert_eq!(map.keys().next().unwrap().b, "baz");
 //! ```
 //!
 //! [`Vec`]: ../../std/vec/struct.Vec.html
 //! [`HashMap`]: ../../std/collections/struct.HashMap.html
 //! [`VecDeque`]: ../../std/collections/struct.VecDeque.html
 //! [`LinkedList`]: ../../std/collections/struct.LinkedList.html
 //! [`BTreeMap`]: ../../std/collections/struct.BTreeMap.html
 //! [`HashSet`]: ../../std/collections/struct.HashSet.html
 //! [`BTreeSet`]: ../../std/collections/struct.BTreeSet.html
 //! [`BinaryHeap`]: ../../std/collections/struct.BinaryHeap.html
 //! [`IntoIterator`]: ../../std/iter/trait.IntoIterator.html
 #![stable(feature = "rust1", since = "1.0.0")]
 #[stable(feature = "rust1", since = "1.0.0")]
 #[rustc_deprecated(reason = "moved to `std::ops::Bound`", since = "1.26.0")]
 #[doc(hidden)]
 pub use ops::Bound;
 #[stable(feature = "rust1", since = "1.0.0")]
 pub use alloc_crate::collections::{BinaryHeap, BTreeMap, BTreeSet};
 #[stable(feature = "rust1", since = "1.0.0")]
 pub use alloc_crate::collections::{LinkedList, VecDeque};
 #[stable(feature = "rust1", since = "1.0.0")]
 pub use alloc_crate::collections::{binary_heap, btree_map, btree_set};
 #[stable(feature = "rust1", since = "1.0.0")]
 pub use alloc_crate::collections::{linked_list, vec_deque};
 #[stable(feature = "rust1", since = "1.0.0")]
 pub use self::hash_map::HashMap;
 #[stable(feature = "rust1", since = "1.0.0")]
 pub use self::hash_set::HashSet;
 #[unstable(feature = "try_reserve", reason = "new API", issue="48043")]
 pub use alloc_crate::collections::CollectionAllocErr;
 mod hash;
 #[stable(feature = "rust1", since = "1.0.0")]
 pub mod hash_map {
    //! A hash map implemented with linear probing and Robin Hood bucket stealing.
    #[stable(feature = "rust1", since = "1.0.0")]
    pub use super::hash::map::*;
 }
 #[stable(feature = "rust1", since = "1.0.0")]
 pub mod hash_set {
    //! A hash set implemented as a `HashMap` where the value is `()`.
    #[stable(feature = "rust1", since = "1.0.0")]
    pub use super::hash::set::*;
 }
--- a/ctr-std/src/env.rs
+++ b/ctr-std/src/env.rs
--- a/ctr-std/src/error.rs
+++ b/ctr-std/src/error.rs
@ -1,548 +0,0 @@
 // Copyright 2014 The Rust Project Developers. See the COPYRIGHT
 // file at the top-level directory of this distribution and at
 // http://rust-lang.org/COPYRIGHT.
 //
 // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
 // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 //! Traits for working with Errors.
 #![stable(feature = "rust1", since = "1.0.0")]
 // A note about crates and the facade:
 //
 // Originally, the `Error` trait was defined in libcore, and the impls
 // were scattered about. However, coherence objected to this
 // arrangement, because to create the blanket impls for `Box` required
 // knowing that `&str: !Error`, and we have no means to deal with that
 // sort of conflict just now. Therefore, for the time being, we have
 // moved the `Error` trait into libstd. As we evolve a sol'n to the
 // coherence challenge (e.g., specialization, neg impls, etc) we can
 // reconsider what crate these items belong in.
 use alloc::{AllocErr, LayoutErr, CannotReallocInPlace};
 use any::TypeId;
 use borrow::Cow;
 use cell;
 use char;
 use core::array;
 use fmt::{self, Debug, Display};
 use mem::transmute;
 use num;
 use str;
 use string;
 /// `Error` is a trait representing the basic expectations for error values,
 /// i.e. values of type `E` in [`Result<T, E>`]. Errors must describe
 /// themselves through the [`Display`] and [`Debug`] traits, and may provide
 /// cause chain information:
 ///
 /// The [`cause`] method is generally used when errors cross "abstraction
 /// boundaries", i.e.  when a one module must report an error that is "caused"
 /// by an error from a lower-level module. This setup makes it possible for the
 /// high-level module to provide its own errors that do not commit to any
 /// particular implementation, but also reveal some of its implementation for
 /// debugging via [`cause`] chains.
 ///
 /// [`Result<T, E>`]: ../result/enum.Result.html
 /// [`Display`]: ../fmt/trait.Display.html
 /// [`Debug`]: ../fmt/trait.Debug.html
 /// [`cause`]: trait.Error.html#method.cause
 #[stable(feature = "rust1", since = "1.0.0")]
 pub trait Error: Debug + Display {
    /// **This method is soft-deprecated.**
    ///
    /// Although using it won’t cause compilation warning,
    /// new code should use [`Display`] instead
    /// and new `impl`s can omit it.
    ///
    /// To obtain error description as a string, use `to_string()`.
    ///
    /// [`Display`]: ../fmt/trait.Display.html
    ///
    /// # Examples
    ///
    /// ```
    /// match "xc".parse::<u32>() {
    ///     Err(e) => {
    ///         // Print `e` itself, not `e.description()`.
    ///         println!("Error: {}", e);
    ///     }
    ///     _ => println!("No error"),
    /// }
    /// ```
    #[stable(feature = "rust1", since = "1.0.0")]
    fn description(&self) -> &str {
        "description() is deprecated; use Display"
    }
    /// The lower-level cause of this error, if any.
    ///
    /// # Examples
    ///
    /// ```
    /// use std::error::Error;
    /// use std::fmt;
    ///
    /// #[derive(Debug)]
    /// struct SuperError {
    ///     side: SuperErrorSideKick,
    /// }
    ///
    /// impl fmt::Display for SuperError {
    ///     fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
    ///         write!(f, "SuperError is here!")
    ///     }
    /// }
    ///
    /// impl Error for SuperError {
    ///     fn description(&self) -> &str {
    ///         "I'm the superhero of errors"
    ///     }
    ///
    ///     fn cause(&self) -> Option<&Error> {
    ///         Some(&self.side)
    ///     }
    /// }
    ///
    /// #[derive(Debug)]
    /// struct SuperErrorSideKick;
    ///
    /// impl fmt::Display for SuperErrorSideKick {
    ///     fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
    ///         write!(f, "SuperErrorSideKick is here!")
    ///     }
    /// }
    ///
    /// impl Error for SuperErrorSideKick {
    ///     fn description(&self) -> &str {
    ///         "I'm SuperError side kick"
    ///     }
    /// }
    ///
    /// fn get_super_error() -> Result<(), SuperError> {
    ///     Err(SuperError { side: SuperErrorSideKick })
    /// }
    ///
    /// fn main() {
    ///     match get_super_error() {
    ///         Err(e) => {
    ///             println!("Error: {}", e.description());
    ///             println!("Caused by: {}", e.cause().unwrap());
    ///         }
    ///         _ => println!("No error"),
    ///     }
    /// }
    /// ```
    #[stable(feature = "rust1", since = "1.0.0")]
    fn cause(&self) -> Option<&dyn Error> { None }
    /// Get the `TypeId` of `self`
    #[doc(hidden)]
    #[unstable(feature = "error_type_id",
               reason = "unclear whether to commit to this public implementation detail",
               issue = "27745")]
    fn type_id(&self) -> TypeId where Self: 'static {
        TypeId::of::<Self>()
    }
 }
 #[stable(feature = "rust1", since = "1.0.0")]
 impl<'a, E: Error + 'a> From<E> for Box<dyn Error + 'a> {
    fn from(err: E) -> Box<dyn Error + 'a> {
        Box::new(err)
    }
 }
 #[stable(feature = "rust1", since = "1.0.0")]
 impl<'a, E: Error + Send + Sync + 'a> From<E> for Box<dyn Error + Send + Sync + 'a> {
    fn from(err: E) -> Box<dyn Error + Send + Sync + 'a> {
        Box::new(err)
    }
 }
 #[stable(feature = "rust1", since = "1.0.0")]
 impl From<String> for Box<dyn Error + Send + Sync> {
    fn from(err: String) -> Box<dyn Error + Send + Sync> {
        #[derive(Debug)]
        struct StringError(String);
        impl Error for StringError {
            fn description(&self) -> &str { &self.0 }
        }
        impl Display for StringError {
            fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
                Display::fmt(&self.0, f)
            }
        }
        Box::new(StringError(err))
    }
 }
 #[stable(feature = "string_box_error", since = "1.6.0")]
 impl From<String> for Box<dyn Error> {
    fn from(str_err: String) -> Box<dyn Error> {
        let err1: Box<dyn Error + Send + Sync> = From::from(str_err);
        let err2: Box<dyn Error> = err1;
        err2
    }
 }
 #[stable(feature = "rust1", since = "1.0.0")]
 impl<'a, 'b> From<&'b str> for Box<dyn Error + Send + Sync + 'a> {
    fn from(err: &'b str) -> Box<dyn Error + Send + Sync + 'a> {
        From::from(String::from(err))
    }
 }
 #[stable(feature = "string_box_error", since = "1.6.0")]
 impl<'a> From<&'a str> for Box<dyn Error> {
    fn from(err: &'a str) -> Box<dyn Error> {
        From::from(String::from(err))
    }
 }
 #[stable(feature = "cow_box_error", since = "1.22.0")]
 impl<'a, 'b> From<Cow<'b, str>> for Box<dyn Error + Send + Sync + 'a> {
    fn from(err: Cow<'b, str>) -> Box<dyn Error + Send + Sync + 'a> {
        From::from(String::from(err))
    }
 }
 #[stable(feature = "cow_box_error", since = "1.22.0")]
 impl<'a> From<Cow<'a, str>> for Box<dyn Error> {
    fn from(err: Cow<'a, str>) -> Box<dyn Error> {
        From::from(String::from(err))
    }
 }
 #[unstable(feature = "never_type", issue = "35121")]
 impl Error for ! {
    fn description(&self) -> &str { *self }
 }
 #[unstable(feature = "allocator_api",
           reason = "the precise API and guarantees it provides may be tweaked.",
           issue = "32838")]
 impl Error for AllocErr {
    fn description(&self) -> &str {
        "memory allocation failed"
    }
 }
 #[unstable(feature = "allocator_api",
           reason = "the precise API and guarantees it provides may be tweaked.",
           issue = "32838")]
 impl Error for LayoutErr {
    fn description(&self) -> &str {
        "invalid parameters to Layout::from_size_align"
    }
 }
 #[unstable(feature = "allocator_api",
           reason = "the precise API and guarantees it provides may be tweaked.",
           issue = "32838")]
 impl Error for CannotReallocInPlace {
    fn description(&self) -> &str {
        CannotReallocInPlace::description(self)
    }
 }
 #[stable(feature = "rust1", since = "1.0.0")]
 impl Error for str::ParseBoolError {
    fn description(&self) -> &str { "failed to parse bool" }
 }
 #[stable(feature = "rust1", since = "1.0.0")]
 impl Error for str::Utf8Error {
    fn description(&self) -> &str {
        "invalid utf-8: corrupt contents"
    }
 }
 #[stable(feature = "rust1", since = "1.0.0")]
 impl Error for num::ParseIntError {
    fn description(&self) -> &str {
        self.__description()
    }
 }
 #[unstable(feature = "try_from", issue = "33417")]
 impl Error for num::TryFromIntError {
    fn description(&self) -> &str {
        self.__description()
    }
 }
 #[unstable(feature = "try_from", issue = "33417")]
 impl Error for array::TryFromSliceError {
    fn description(&self) -> &str {
        self.__description()
    }
 }
 #[stable(feature = "rust1", since = "1.0.0")]
 impl Error for num::ParseFloatError {
    fn description(&self) -> &str {
        self.__description()
    }
 }
 #[stable(feature = "rust1", since = "1.0.0")]
 impl Error for string::FromUtf8Error {
    fn description(&self) -> &str {
        "invalid utf-8"
    }
 }
 #[stable(feature = "rust1", since = "1.0.0")]
 impl Error for string::FromUtf16Error {
    fn description(&self) -> &str {
        "invalid utf-16"
    }
 }
 #[stable(feature = "str_parse_error2", since = "1.8.0")]
 impl Error for string::ParseError {
    fn description(&self) -> &str {
        match *self {}
    }
 }
 #[stable(feature = "decode_utf16", since = "1.9.0")]
 impl Error for char::DecodeUtf16Error {
    fn description(&self) -> &str {
        "unpaired surrogate found"
    }
 }
 #[stable(feature = "box_error", since = "1.8.0")]
 impl<T: Error> Error for Box<T> {
    fn description(&self) -> &str {
        Error::description(&**self)
    }
    fn cause(&self) -> Option<&dyn Error> {
        Error::cause(&**self)
    }
 }
 #[stable(feature = "fmt_error", since = "1.11.0")]
 impl Error for fmt::Error {
    fn description(&self) -> &str {
        "an error occurred when formatting an argument"
    }
 }
 #[stable(feature = "try_borrow", since = "1.13.0")]
 impl Error for cell::BorrowError {
    fn description(&self) -> &str {
        "already mutably borrowed"
    }
 }
 #[stable(feature = "try_borrow", since = "1.13.0")]
 impl Error for cell::BorrowMutError {
    fn description(&self) -> &str {
        "already borrowed"
    }
 }
 #[unstable(feature = "try_from", issue = "33417")]
 impl Error for char::CharTryFromError {
    fn description(&self) -> &str {
        "converted integer out of range for `char`"
    }
 }
 #[stable(feature = "char_from_str", since = "1.20.0")]
 impl Error for char::ParseCharError {
    fn description(&self) -> &str {
        self.__description()
    }
 }
 // copied from any.rs
 impl dyn Error + 'static {
    /// Returns true if the boxed type is the same as `T`
    #[stable(feature = "error_downcast", since = "1.3.0")]
    #[inline]
    pub fn is<T: Error + 'static>(&self) -> bool {
        // Get TypeId of the type this function is instantiated with
        let t = TypeId::of::<T>();
        // Get TypeId of the type in the trait object
        let boxed = self.type_id();
        // Compare both TypeIds on equality
        t == boxed
    }
    /// Returns some reference to the boxed value if it is of type `T`, or
    /// `None` if it isn't.
    #[stable(feature = "error_downcast", since = "1.3.0")]
    #[inline]
    pub fn downcast_ref<T: Error + 'static>(&self) -> Option<&T> {
        if self.is::<T>() {
            unsafe {
                Some(&*(self as *const dyn Error as *const T))
            }
        } else {
            None
        }
    }
    /// Returns some mutable reference to the boxed value if it is of type `T`, or
    /// `None` if it isn't.
    #[stable(feature = "error_downcast", since = "1.3.0")]
    #[inline]
    pub fn downcast_mut<T: Error + 'static>(&mut self) -> Option<&mut T> {
        if self.is::<T>() {
            unsafe {
                Some(&mut *(self as *mut dyn Error as *mut T))
            }
        } else {
            None
        }
    }
 }
 impl dyn Error + 'static + Send {
    /// Forwards to the method defined on the type `Any`.
    #[stable(feature = "error_downcast", since = "1.3.0")]
    #[inline]
    pub fn is<T: Error + 'static>(&self) -> bool {
        <dyn Error + 'static>::is::<T>(self)
    }
    /// Forwards to the method defined on the type `Any`.
    #[stable(feature = "error_downcast", since = "1.3.0")]
    #[inline]
    pub fn downcast_ref<T: Error + 'static>(&self) -> Option<&T> {
        <dyn Error + 'static>::downcast_ref::<T>(self)
    }
    /// Forwards to the method defined on the type `Any`.
    #[stable(feature = "error_downcast", since = "1.3.0")]
    #[inline]
    pub fn downcast_mut<T: Error + 'static>(&mut self) -> Option<&mut T> {
        <dyn Error + 'static>::downcast_mut::<T>(self)
    }
 }
 impl dyn Error + 'static + Send + Sync {
    /// Forwards to the method defined on the type `Any`.
    #[stable(feature = "error_downcast", since = "1.3.0")]
    #[inline]
    pub fn is<T: Error + 'static>(&self) -> bool {
        <dyn Error + 'static>::is::<T>(self)
    }
    /// Forwards to the method defined on the type `Any`.
    #[stable(feature = "error_downcast", since = "1.3.0")]
    #[inline]
    pub fn downcast_ref<T: Error + 'static>(&self) -> Option<&T> {
        <dyn Error + 'static>::downcast_ref::<T>(self)
    }
    /// Forwards to the method defined on the type `Any`.
    #[stable(feature = "error_downcast", since = "1.3.0")]
    #[inline]
    pub fn downcast_mut<T: Error + 'static>(&mut self) -> Option<&mut T> {
        <dyn Error + 'static>::downcast_mut::<T>(self)
    }
 }
 impl dyn Error {
    #[inline]
    #[stable(feature = "error_downcast", since = "1.3.0")]
    /// Attempt to downcast the box to a concrete type.
    pub fn downcast<T: Error + 'static>(self: Box<Self>) -> Result<Box<T>, Box<dyn Error>> {
        if self.is::<T>() {
            unsafe {
                let raw: *mut dyn Error = Box::into_raw(self);
                Ok(Box::from_raw(raw as *mut T))
            }
        } else {
            Err(self)
        }
    }
 }
 impl dyn Error + Send {
    #[inline]
    #[stable(feature = "error_downcast", since = "1.3.0")]
    /// Attempt to downcast the box to a concrete type.
    pub fn downcast<T: Error + 'static>(self: Box<Self>)
                                        -> Result<Box<T>, Box<dyn Error + Send>> {
        let err: Box<dyn Error> = self;
        <dyn Error>::downcast(err).map_err(|s| unsafe {
            // reapply the Send marker
            transmute::<Box<dyn Error>, Box<dyn Error + Send>>(s)
        })
    }
 }
 impl dyn Error + Send + Sync {
    #[inline]
    #[stable(feature = "error_downcast", since = "1.3.0")]
    /// Attempt to downcast the box to a concrete type.
    pub fn downcast<T: Error + 'static>(self: Box<Self>)
                                        -> Result<Box<T>, Box<Self>> {
        let err: Box<dyn Error> = self;
        <dyn Error>::downcast(err).map_err(|s| unsafe {
            // reapply the Send+Sync marker
            transmute::<Box<dyn Error>, Box<dyn Error + Send + Sync>>(s)
        })
    }
 }
 #[cfg(test)]
 mod tests {
    use super::Error;
    use fmt;
    #[derive(Debug, PartialEq)]
    struct A;
    #[derive(Debug, PartialEq)]
    struct B;
    impl fmt::Display for A {
        fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
            write!(f, "A")
        }
    }
    impl fmt::Display for B {
        fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
            write!(f, "B")
        }
    }
    impl Error for A {
        fn description(&self) -> &str { "A-desc" }
    }
    impl Error for B {
        fn description(&self) -> &str { "A-desc" }
    }
    #[test]
    fn downcasting() {
        let mut a = A;
        let a = &mut a as &mut (dyn Error + 'static);
        assert_eq!(a.downcast_ref::<A>(), Some(&A));
        assert_eq!(a.downcast_ref::<B>(), None);
        assert_eq!(a.downcast_mut::<A>(), Some(&mut A));
        assert_eq!(a.downcast_mut::<B>(), None);
        let a: Box<dyn Error> = Box::new(A);
        match a.downcast::<B>() {
            Ok(..) => panic!("expected error"),
            Err(e) => assert_eq!(*e.downcast::<A>().unwrap(), A),
        }
    }
 }
--- a/ctr-std/src/f32.rs
+++ b/ctr-std/src/f32.rs
--- a/ctr-std/src/f64.rs
+++ b/ctr-std/src/f64.rs
--- a/ctr-std/src/ffi/c_str.rs
+++ b/ctr-std/src/ffi/c_str.rs
--- a/ctr-std/src/ffi/mod.rs
+++ b/ctr-std/src/ffi/mod.rs
@ -1,175 +0,0 @@
 // Copyright 2015 The Rust Project Developers. See the COPYRIGHT
 // file at the top-level directory of this distribution and at
 // http://rust-lang.org/COPYRIGHT.
 //
 // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
 // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 //! Utilities related to FFI bindings.
 //!
 //! This module provides utilities to handle data across non-Rust
 //! interfaces, like other programming languages and the underlying
 //! operating system. It is mainly of use for FFI (Foreign Function
 //! Interface) bindings and code that needs to exchange C-like strings
 //! with other languages.
 //!
 //! # Overview
 //!
 //! Rust represents owned strings with the [`String`] type, and
 //! borrowed slices of strings with the [`str`] primitive. Both are
 //! always in UTF-8 encoding, and may contain nul bytes in the middle,
 //! i.e. if you look at the bytes that make up the string, there may
 //! be a `\0` among them. Both `String` and `str` store their length
 //! explicitly; there are no nul terminators at the end of strings
 //! like in C.
 //!
 //! C strings are different from Rust strings:
 //!
 //! * **Encodings** - Rust strings are UTF-8, but C strings may use
 //! other encodings. If you are using a string from C, you should
 //! check its encoding explicitly, rather than just assuming that it
 //! is UTF-8 like you can do in Rust.
 //!
 //! * **Character size** - C strings may use `char` or `wchar_t`-sized
 //! characters; please **note** that C's `char` is different from Rust's.
 //! The C standard leaves the actual sizes of those types open to
 //! interpretation, but defines different APIs for strings made up of
 //! each character type. Rust strings are always UTF-8, so different
 //! Unicode characters will be encoded in a variable number of bytes
 //! each. The Rust type [`char`] represents a '[Unicode scalar
 //! value]', which is similar to, but not the same as, a '[Unicode
 //! code point]'.
 //!
 //! * **Nul terminators and implicit string lengths** - Often, C
 //! strings are nul-terminated, i.e. they have a `\0` character at the
 //! end. The length of a string buffer is not stored, but has to be
 //! calculated; to compute the length of a string, C code must
 //! manually call a function like `strlen()` for `char`-based strings,
 //! or `wcslen()` for `wchar_t`-based ones. Those functions return
 //! the number of characters in the string excluding the nul
 //! terminator, so the buffer length is really `len+1` characters.
 //! Rust strings don't have a nul terminator; their length is always
 //! stored and does not need to be calculated. While in Rust
 //! accessing a string's length is a O(1) operation (because the
 //! length is stored); in C it is an O(length) operation because the
 //! length needs to be computed by scanning the string for the nul
 //! terminator.
 //!
 //! * **Internal nul characters** - When C strings have a nul
 //! terminator character, this usually means that they cannot have nul
 //! characters in the middle — a nul character would essentially
 //! truncate the string. Rust strings *can* have nul characters in
 //! the middle, because nul does not have to mark the end of the
 //! string in Rust.
 //!
 //! # Representations of non-Rust strings
 //!
 //! [`CString`] and [`CStr`] are useful when you need to transfer
 //! UTF-8 strings to and from languages with a C ABI, like Python.
 //!
 //! * **From Rust to C:** [`CString`] represents an owned, C-friendly
 //! string: it is nul-terminated, and has no internal nul characters.
 //! Rust code can create a `CString` out of a normal string (provided
 //! that the string doesn't have nul characters in the middle), and
 //! then use a variety of methods to obtain a raw `*mut u8` that can
 //! then be passed as an argument to functions which use the C
 //! conventions for strings.
 //!
 //! * **From C to Rust:** [`CStr`] represents a borrowed C string; it
 //! is what you would use to wrap a raw `*const u8` that you got from
 //! a C function. A `CStr` is guaranteed to be a nul-terminated array
 //! of bytes. Once you have a `CStr`, you can convert it to a Rust
 //! `&str` if it's valid UTF-8, or lossily convert it by adding
 //! replacement characters.
 //!
 //! [`OsString`] and [`OsStr`] are useful when you need to transfer
 //! strings to and from the operating system itself, or when capturing
 //! the output of external commands. Conversions between `OsString`,
 //! `OsStr` and Rust strings work similarly to those for [`CString`]
 //! and [`CStr`].
 //!
 //! * [`OsString`] represents an owned string in whatever
 //! representation the operating system prefers. In the Rust standard
 //! library, various APIs that transfer strings to/from the operating
 //! system use `OsString` instead of plain strings. For example,
 //! [`env::var_os()`] is used to query environment variables; it
 //! returns an `Option<OsString>`. If the environment variable exists
 //! you will get a `Some(os_string)`, which you can *then* try to
 //! convert to a Rust string. This yields a [`Result<>`], so that
 //! your code can detect errors in case the environment variable did
 //! not in fact contain valid Unicode data.
 //!
 //! * [`OsStr`] represents a borrowed reference to a string in a
 //! format that can be passed to the operating system. It can be
 //! converted into an UTF-8 Rust string slice in a similar way to
 //! `OsString`.
 //!
 //! # Conversions
 //!
 //! ## On Unix
 //!
 //! On Unix, [`OsStr`] implements the
 //! `std::os::unix:ffi::`[`OsStrExt`][unix.OsStrExt] trait, which
 //! augments it with two methods, [`from_bytes`] and [`as_bytes`].
 //! These do inexpensive conversions from and to UTF-8 byte slices.
 //!
 //! Additionally, on Unix [`OsString`] implements the
 //! `std::os::unix:ffi::`[`OsStringExt`][unix.OsStringExt] trait,
 //! which provides [`from_vec`] and [`into_vec`] methods that consume
 //! their arguments, and take or produce vectors of [`u8`].
 //!
 //! ## On Windows
 //!
 //! On Windows, [`OsStr`] implements the
 //! `std::os::windows::ffi::`[`OsStrExt`][windows.OsStrExt] trait,
 //! which provides an [`encode_wide`] method. This provides an
 //! iterator that can be [`collect`]ed into a vector of [`u16`].
 //!
 //! Additionally, on Windows [`OsString`] implements the
 //! `std::os::windows:ffi::`[`OsStringExt`][windows.OsStringExt]
 //! trait, which provides a [`from_wide`] method. The result of this
 //! method is an `OsString` which can be round-tripped to a Windows
 //! string losslessly.
 //!
 //! [`String`]: ../string/struct.String.html
 //! [`str`]: ../primitive.str.html
 //! [`char`]: ../primitive.char.html
 //! [`u8`]: ../primitive.u8.html
 //! [`u16`]: ../primitive.u16.html
 //! [Unicode scalar value]: http://www.unicode.org/glossary/#unicode_scalar_value
 //! [Unicode code point]: http://www.unicode.org/glossary/#code_point
 //! [`CString`]: struct.CString.html
 //! [`CStr`]: struct.CStr.html
 //! [`OsString`]: struct.OsString.html
 //! [`OsStr`]: struct.OsStr.html
 //! [`env::set_var()`]: ../env/fn.set_var.html
 //! [`env::var_os()`]: ../env/fn.var_os.html
 //! [`Result<>`]: ../result/enum.Result.html
 //! [unix.OsStringExt]: ../os/unix/ffi/trait.OsStringExt.html
 //! [`from_vec`]: ../os/unix/ffi/trait.OsStringExt.html#tymethod.from_vec
 //! [`into_vec`]: ../os/unix/ffi/trait.OsStringExt.html#tymethod.into_vec
 //! [unix.OsStrExt]: ../os/unix/ffi/trait.OsStrExt.html
 //! [`from_bytes`]: ../os/unix/ffi/trait.OsStrExt.html#tymethod.from_bytes
 //! [`as_bytes`]: ../os/unix/ffi/trait.OsStrExt.html#tymethod.as_bytes
 //! [`OsStrExt`]: ../os/unix/ffi/trait.OsStrExt.html
 //! [windows.OsStrExt]: ../os/windows/ffi/trait.OsStrExt.html
 //! [`encode_wide`]: ../os/windows/ffi/trait.OsStrExt.html#tymethod.encode_wide
 //! [`collect`]: ../iter/trait.Iterator.html#method.collect
 //! [windows.OsStringExt]: ../os/windows/ffi/trait.OsStringExt.html
 //! [`from_wide`]: ../os/windows/ffi/trait.OsStringExt.html#tymethod.from_wide
 #![stable(feature = "rust1", since = "1.0.0")]
 #[stable(feature = "rust1", since = "1.0.0")]
 pub use self::c_str::{CString, CStr, NulError, IntoStringError};
 #[stable(feature = "cstr_from_bytes", since = "1.10.0")]
 pub use self::c_str::{FromBytesWithNulError};
 #[stable(feature = "rust1", since = "1.0.0")]
 pub use self::os_str::{OsString, OsStr};
 mod c_str;
 mod os_str;
--- a/ctr-std/src/ffi/os_str.rs
+++ b/ctr-std/src/ffi/os_str.rs
--- a/ctr-std/src/fs.rs
+++ b/ctr-std/src/fs.rs
--- a/ctr-std/src/future.rs
+++ b/ctr-std/src/future.rs
@ -1,116 +0,0 @@
 // Copyright 2018 The Rust Project Developers. See the COPYRIGHT
 // file at the top-level directory of this distribution and at
 // http://rust-lang.org/COPYRIGHT.
 //
 // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
 // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 //! Asynchronous values.
 use core::cell::Cell;
 use core::marker::Unpin;
 use core::mem::PinMut;
 use core::option::Option;
 use core::ptr::NonNull;
 use core::task::{self, Poll};
 use core::ops::{Drop, Generator, GeneratorState};
 #[doc(inline)]
 pub use core::future::*;
 /// Wrap a future in a generator.
 ///
 /// This function returns a `GenFuture` underneath, but hides it in `impl Trait` to give
 /// better error messages (`impl Future` rather than `GenFuture<[closure.....]>`).
 #[unstable(feature = "gen_future", issue = "50547")]
 pub fn from_generator<T: Generator<Yield = ()>>(x: T) -> impl Future<Output = T::Return> {
    GenFuture(x)
 }
 /// A wrapper around generators used to implement `Future` for `async`/`await` code.
 #[unstable(feature = "gen_future", issue = "50547")]
 #[derive(Copy, Clone, Debug, Eq, PartialEq, Ord, PartialOrd, Hash)]
 struct GenFuture<T: Generator<Yield = ()>>(T);
 // We rely on the fact that async/await futures are immovable in order to create
 // self-referential borrows in the underlying generator.
 impl<T: Generator<Yield = ()>> !Unpin for GenFuture<T> {}
 #[unstable(feature = "gen_future", issue = "50547")]
 impl<T: Generator<Yield = ()>> Future for GenFuture<T> {
    type Output = T::Return;
    fn poll(self: PinMut<Self>, cx: &mut task::Context) -> Poll<Self::Output> {
        set_task_cx(cx, || match unsafe { PinMut::get_mut_unchecked(self).0.resume() } {
            GeneratorState::Yielded(()) => Poll::Pending,
            GeneratorState::Complete(x) => Poll::Ready(x),
        })
    }
 }
 thread_local! {
    static TLS_CX: Cell<Option<NonNull<task::Context<'static>>>> = Cell::new(None);
 }
 struct SetOnDrop(Option<NonNull<task::Context<'static>>>);
 impl Drop for SetOnDrop {
    fn drop(&mut self) {
        TLS_CX.with(|tls_cx| {
            tls_cx.set(self.0.take());
        });
    }
 }
 #[unstable(feature = "gen_future", issue = "50547")]
 /// Sets the thread-local task context used by async/await futures.
 pub fn set_task_cx<F, R>(cx: &mut task::Context, f: F) -> R
 where
    F: FnOnce() -> R
 {
    let old_cx = TLS_CX.with(|tls_cx| {
        tls_cx.replace(NonNull::new(
            cx
                as *mut task::Context
                as *mut ()
                as *mut task::Context<'static>
        ))
    });
    let _reset_cx = SetOnDrop(old_cx);
    f()
 }
 #[unstable(feature = "gen_future", issue = "50547")]
 /// Retrieves the thread-local task context used by async/await futures.
 ///
 /// This function acquires exclusive access to the task context.
 ///
 /// Panics if no task has been set or if the task context has already been
 /// retrived by a surrounding call to get_task_cx.
 pub fn get_task_cx<F, R>(f: F) -> R
 where
    F: FnOnce(&mut task::Context) -> R
 {
    let cx_ptr = TLS_CX.with(|tls_cx| {
        // Clear the entry so that nested `with_get_cx` calls
        // will fail or set their own value.
        tls_cx.replace(None)
    });
    let _reset_cx = SetOnDrop(cx_ptr);
    let mut cx_ptr = cx_ptr.expect(
        "TLS task::Context not set. This is a rustc bug. \
        Please file an issue on https://github.com/rust-lang/rust.");
    unsafe { f(cx_ptr.as_mut()) }
 }
 #[unstable(feature = "gen_future", issue = "50547")]
 /// Polls a future in the current thread-local task context.
 pub fn poll_in_task_cx<F>(f: PinMut<F>) -> Poll<F::Output>
 where
    F: Future
 {
    get_task_cx(|cx| f.poll(cx))
 }
--- a/ctr-std/src/io/buffered.rs
+++ b/ctr-std/src/io/buffered.rs
--- a/ctr-std/src/io/cursor.rs
+++ b/ctr-std/src/io/cursor.rs
@ -1,682 +0,0 @@
 // Copyright 2015 The Rust Project Developers. See the COPYRIGHT
 // file at the top-level directory of this distribution and at
 // http://rust-lang.org/COPYRIGHT.
 //
 // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
 // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 use io::prelude::*;
 use core::convert::TryInto;
 use cmp;
 use io::{self, Initializer, SeekFrom, Error, ErrorKind};
 /// A `Cursor` wraps an in-memory buffer and provides it with a
 /// [`Seek`] implementation.
 ///
 /// `Cursor`s are used with in-memory buffers, anything implementing
 /// `AsRef<[u8]>`, to allow them to implement [`Read`] and/or [`Write`],
 /// allowing these buffers to be used anywhere you might use a reader or writer
 /// that does actual I/O.
 ///
 /// The standard library implements some I/O traits on various types which
 /// are commonly used as a buffer, like `Cursor<`[`Vec`]`<u8>>` and
 /// `Cursor<`[`&[u8]`][bytes]`>`.
 ///
 /// # Examples
 ///
 /// We may want to write bytes to a [`File`] in our production
 /// code, but use an in-memory buffer in our tests. We can do this with
 /// `Cursor`:
 ///
 /// [`Seek`]: trait.Seek.html
 /// [`Read`]: ../../std/io/trait.Read.html
 /// [`Write`]: ../../std/io/trait.Write.html
 /// [`Vec`]: ../../std/vec/struct.Vec.html
 /// [bytes]: ../../std/primitive.slice.html
 /// [`File`]: ../fs/struct.File.html
 ///
 /// ```no_run
 /// use std::io::prelude::*;
 /// use std::io::{self, SeekFrom};
 /// use std::fs::File;
 ///
 /// // a library function we've written
 /// fn write_ten_bytes_at_end<W: Write + Seek>(writer: &mut W) -> io::Result<()> {
 ///     writer.seek(SeekFrom::End(-10))?;
 ///
 ///     for i in 0..10 {
 ///         writer.write(&[i])?;
 ///     }
 ///
 ///     // all went well
 ///     Ok(())
 /// }
 ///
 /// # fn foo() -> io::Result<()> {
 /// // Here's some code that uses this library function.
 /// //
 /// // We might want to use a BufReader here for efficiency, but let's
 /// // keep this example focused.
 /// let mut file = File::create("foo.txt")?;
 ///
 /// write_ten_bytes_at_end(&mut file)?;
 /// # Ok(())
 /// # }
 ///
 /// // now let's write a test
 /// #[test]
 /// fn test_writes_bytes() {
 ///     // setting up a real File is much slower than an in-memory buffer,
 ///     // let's use a cursor instead
 ///     use std::io::Cursor;
 ///     let mut buff = Cursor::new(vec![0; 15]);
 ///
 ///     write_ten_bytes_at_end(&mut buff).unwrap();
 ///
 ///     assert_eq!(&buff.get_ref()[5..15], &[0, 1, 2, 3, 4, 5, 6, 7, 8, 9]);
 /// }
 /// ```
 #[stable(feature = "rust1", since = "1.0.0")]
 #[derive(Clone, Debug)]
 pub struct Cursor<T> {
    inner: T,
    pos: u64,
 }
 impl<T> Cursor<T> {
    /// Creates a new cursor wrapping the provided underlying in-memory buffer.
    ///
    /// Cursor initial position is `0` even if underlying buffer (e.g. `Vec`)
    /// is not empty. So writing to cursor starts with overwriting `Vec`
    /// content, not with appending to it.
    ///
    /// # Examples
    ///
    /// ```
    /// use std::io::Cursor;
    ///
    /// let buff = Cursor::new(Vec::new());
    /// # fn force_inference(_: &Cursor<Vec<u8>>) {}
    /// # force_inference(&buff);
    /// ```
    #[stable(feature = "rust1", since = "1.0.0")]
    pub fn new(inner: T) -> Cursor<T> {
        Cursor { pos: 0, inner: inner }
    }
    /// Consumes this cursor, returning the underlying value.
    ///
    /// # Examples
    ///
    /// ```
    /// use std::io::Cursor;
    ///
    /// let buff = Cursor::new(Vec::new());
    /// # fn force_inference(_: &Cursor<Vec<u8>>) {}
    /// # force_inference(&buff);
    ///
    /// let vec = buff.into_inner();
    /// ```
    #[stable(feature = "rust1", since = "1.0.0")]
    pub fn into_inner(self) -> T { self.inner }
    /// Gets a reference to the underlying value in this cursor.
    ///
    /// # Examples
    ///
    /// ```
    /// use std::io::Cursor;
    ///
    /// let buff = Cursor::new(Vec::new());
    /// # fn force_inference(_: &Cursor<Vec<u8>>) {}
    /// # force_inference(&buff);
    ///
    /// let reference = buff.get_ref();
    /// ```
    #[stable(feature = "rust1", since = "1.0.0")]
    pub fn get_ref(&self) -> &T { &self.inner }
    /// Gets a mutable reference to the underlying value in this cursor.
    ///
    /// Care should be taken to avoid modifying the internal I/O state of the
    /// underlying value as it may corrupt this cursor's position.
    ///
    /// # Examples
    ///
    /// ```
    /// use std::io::Cursor;
    ///
    /// let mut buff = Cursor::new(Vec::new());
    /// # fn force_inference(_: &Cursor<Vec<u8>>) {}
    /// # force_inference(&buff);
    ///
    /// let reference = buff.get_mut();
    /// ```
    #[stable(feature = "rust1", since = "1.0.0")]
    pub fn get_mut(&mut self) -> &mut T { &mut self.inner }
    /// Returns the current position of this cursor.
    ///
    /// # Examples
    ///
    /// ```
    /// use std::io::Cursor;
    /// use std::io::prelude::*;
    /// use std::io::SeekFrom;
    ///
    /// let mut buff = Cursor::new(vec![1, 2, 3, 4, 5]);
    ///
    /// assert_eq!(buff.position(), 0);
    ///
    /// buff.seek(SeekFrom::Current(2)).unwrap();
    /// assert_eq!(buff.position(), 2);
    ///
    /// buff.seek(SeekFrom::Current(-1)).unwrap();
    /// assert_eq!(buff.position(), 1);
    /// ```
    #[stable(feature = "rust1", since = "1.0.0")]
    pub fn position(&self) -> u64 { self.pos }
    /// Sets the position of this cursor.
    ///
    /// # Examples
    ///
    /// ```
    /// use std::io::Cursor;
    ///
    /// let mut buff = Cursor::new(vec![1, 2, 3, 4, 5]);
    ///
    /// assert_eq!(buff.position(), 0);
    ///
    /// buff.set_position(2);
    /// assert_eq!(buff.position(), 2);
    ///
    /// buff.set_position(4);
    /// assert_eq!(buff.position(), 4);
    /// ```
    #[stable(feature = "rust1", since = "1.0.0")]
    pub fn set_position(&mut self, pos: u64) { self.pos = pos; }
 }
 #[stable(feature = "rust1", since = "1.0.0")]
 impl<T> io::Seek for Cursor<T> where T: AsRef<[u8]> {
    fn seek(&mut self, style: SeekFrom) -> io::Result<u64> {
        let (base_pos, offset) = match style {
            SeekFrom::Start(n) => { self.pos = n; return Ok(n); }
            SeekFrom::End(n) => (self.inner.as_ref().len() as u64, n),
            SeekFrom::Current(n) => (self.pos, n),
        };
        let new_pos = if offset >= 0 {
            base_pos.checked_add(offset as u64)
        } else {
            base_pos.checked_sub((offset.wrapping_neg()) as u64)
        };
        match new_pos {
            Some(n) => {self.pos = n; Ok(self.pos)}
            None => Err(Error::new(ErrorKind::InvalidInput,
                           "invalid seek to a negative or overflowing position"))
        }
    }
 }
 #[stable(feature = "rust1", since = "1.0.0")]
 impl<T> Read for Cursor<T> where T: AsRef<[u8]> {
    fn read(&mut self, buf: &mut [u8]) -> io::Result<usize> {
        let n = Read::read(&mut self.fill_buf()?, buf)?;
        self.pos += n as u64;
        Ok(n)
    }
    fn read_exact(&mut self, buf: &mut [u8]) -> io::Result<()> {
        let n = buf.len();
        Read::read_exact(&mut self.fill_buf()?, buf)?;
        self.pos += n as u64;
        Ok(())
    }
    #[inline]
    unsafe fn initializer(&self) -> Initializer {
        Initializer::nop()
    }
 }
 #[stable(feature = "rust1", since = "1.0.0")]
 impl<T> BufRead for Cursor<T> where T: AsRef<[u8]> {
    fn fill_buf(&mut self) -> io::Result<&[u8]> {
        let amt = cmp::min(self.pos, self.inner.as_ref().len() as u64);
        Ok(&self.inner.as_ref()[(amt as usize)..])
    }
    fn consume(&mut self, amt: usize) { self.pos += amt as u64; }
 }
 // Non-resizing write implementation
 fn slice_write(pos_mut: &mut u64, slice: &mut [u8], buf: &[u8]) -> io::Result<usize> {
    let pos = cmp::min(*pos_mut, slice.len() as u64);
    let amt = (&mut slice[(pos as usize)..]).write(buf)?;
    *pos_mut += amt as u64;
    Ok(amt)
 }
 // Resizing write implementation
 fn vec_write(pos_mut: &mut u64, vec: &mut Vec<u8>, buf: &[u8]) -> io::Result<usize> {
    let pos: usize = (*pos_mut).try_into().map_err(|_| {
        Error::new(ErrorKind::InvalidInput,
                    "cursor position exceeds maximum possible vector length")
    })?;
    // Make sure the internal buffer is as least as big as where we
    // currently are
    let len = vec.len();
    if len < pos {
        // use `resize` so that the zero filling is as efficient as possible
        vec.resize(pos, 0);
    }
    // Figure out what bytes will be used to overwrite what's currently
    // there (left), and what will be appended on the end (right)
    {
        let space = vec.len() - pos;
        let (left, right) = buf.split_at(cmp::min(space, buf.len()));
        vec[pos..pos + left.len()].copy_from_slice(left);
        vec.extend_from_slice(right);
    }
    // Bump us forward
    *pos_mut = (pos + buf.len()) as u64;
    Ok(buf.len())
 }
 #[stable(feature = "rust1", since = "1.0.0")]
 impl<'a> Write for Cursor<&'a mut [u8]> {
    #[inline]
    fn write(&mut self, buf: &[u8]) -> io::Result<usize> {
        slice_write(&mut self.pos, self.inner, buf)
    }
    fn flush(&mut self) -> io::Result<()> { Ok(()) }
 }
 #[stable(feature = "cursor_mut_vec", since = "1.25.0")]
 impl<'a> Write for Cursor<&'a mut Vec<u8>> {
    fn write(&mut self, buf: &[u8]) -> io::Result<usize> {
        vec_write(&mut self.pos, self.inner, buf)
    }
    fn flush(&mut self) -> io::Result<()> { Ok(()) }
 }
 #[stable(feature = "rust1", since = "1.0.0")]
 impl Write for Cursor<Vec<u8>> {
    fn write(&mut self, buf: &[u8]) -> io::Result<usize> {
        vec_write(&mut self.pos, &mut self.inner, buf)
    }
    fn flush(&mut self) -> io::Result<()> { Ok(()) }
 }
 #[stable(feature = "cursor_box_slice", since = "1.5.0")]
 impl Write for Cursor<Box<[u8]>> {
    #[inline]
    fn write(&mut self, buf: &[u8]) -> io::Result<usize> {
        slice_write(&mut self.pos, &mut self.inner, buf)
    }
    fn flush(&mut self) -> io::Result<()> { Ok(()) }
 }
 #[cfg(test)]
 mod tests {
    use io::prelude::*;
    use io::{Cursor, SeekFrom};
    #[test]
    fn test_vec_writer() {
        let mut writer = Vec::new();
        assert_eq!(writer.write(&[0]).unwrap(), 1);
        assert_eq!(writer.write(&[1, 2, 3]).unwrap(), 3);
        assert_eq!(writer.write(&[4, 5, 6, 7]).unwrap(), 4);
        let b: &[_] = &[0, 1, 2, 3, 4, 5, 6, 7];
        assert_eq!(writer, b);
    }
    #[test]
    fn test_mem_writer() {
        let mut writer = Cursor::new(Vec::new());
        assert_eq!(writer.write(&[0]).unwrap(), 1);
        assert_eq!(writer.write(&[1, 2, 3]).unwrap(), 3);
        assert_eq!(writer.write(&[4, 5, 6, 7]).unwrap(), 4);
        let b: &[_] = &[0, 1, 2, 3, 4, 5, 6, 7];
        assert_eq!(&writer.get_ref()[..], b);
    }
    #[test]
    fn test_mem_mut_writer() {
        let mut vec = Vec::new();
        let mut writer = Cursor::new(&mut vec);
        assert_eq!(writer.write(&[0]).unwrap(), 1);
        assert_eq!(writer.write(&[1, 2, 3]).unwrap(), 3);
        assert_eq!(writer.write(&[4, 5, 6, 7]).unwrap(), 4);
        let b: &[_] = &[0, 1, 2, 3, 4, 5, 6, 7];
        assert_eq!(&writer.get_ref()[..], b);
    }
    #[test]
    fn test_box_slice_writer() {
        let mut writer = Cursor::new(vec![0u8; 9].into_boxed_slice());
        assert_eq!(writer.position(), 0);
        assert_eq!(writer.write(&[0]).unwrap(), 1);
        assert_eq!(writer.position(), 1);
        assert_eq!(writer.write(&[1, 2, 3]).unwrap(), 3);
        assert_eq!(writer.write(&[4, 5, 6, 7]).unwrap(), 4);
        assert_eq!(writer.position(), 8);
        assert_eq!(writer.write(&[]).unwrap(), 0);
        assert_eq!(writer.position(), 8);
        assert_eq!(writer.write(&[8, 9]).unwrap(), 1);
        assert_eq!(writer.write(&[10]).unwrap(), 0);
        let b: &[_] = &[0, 1, 2, 3, 4, 5, 6, 7, 8];
        assert_eq!(&**writer.get_ref(), b);
    }
    #[test]
    fn test_buf_writer() {
        let mut buf = [0 as u8; 9];
        {
            let mut writer = Cursor::new(&mut buf[..]);
            assert_eq!(writer.position(), 0);
            assert_eq!(writer.write(&[0]).unwrap(), 1);
            assert_eq!(writer.position(), 1);
            assert_eq!(writer.write(&[1, 2, 3]).unwrap(), 3);
            assert_eq!(writer.write(&[4, 5, 6, 7]).unwrap(), 4);
            assert_eq!(writer.position(), 8);
            assert_eq!(writer.write(&[]).unwrap(), 0);
            assert_eq!(writer.position(), 8);
            assert_eq!(writer.write(&[8, 9]).unwrap(), 1);
            assert_eq!(writer.write(&[10]).unwrap(), 0);
        }
        let b: &[_] = &[0, 1, 2, 3, 4, 5, 6, 7, 8];
        assert_eq!(buf, b);
    }
    #[test]
    fn test_buf_writer_seek() {
        let mut buf = [0 as u8; 8];
        {
            let mut writer = Cursor::new(&mut buf[..]);
            assert_eq!(writer.position(), 0);
            assert_eq!(writer.write(&[1]).unwrap(), 1);
            assert_eq!(writer.position(), 1);
            assert_eq!(writer.seek(SeekFrom::Start(2)).unwrap(), 2);
            assert_eq!(writer.position(), 2);
            assert_eq!(writer.write(&[2]).unwrap(), 1);
            assert_eq!(writer.position(), 3);
            assert_eq!(writer.seek(SeekFrom::Current(-2)).unwrap(), 1);
            assert_eq!(writer.position(), 1);
            assert_eq!(writer.write(&[3]).unwrap(), 1);
            assert_eq!(writer.position(), 2);
            assert_eq!(writer.seek(SeekFrom::End(-1)).unwrap(), 7);
            assert_eq!(writer.position(), 7);
            assert_eq!(writer.write(&[4]).unwrap(), 1);
            assert_eq!(writer.position(), 8);
        }
        let b: &[_] = &[1, 3, 2, 0, 0, 0, 0, 4];
        assert_eq!(buf, b);
    }
    #[test]
    fn test_buf_writer_error() {
        let mut buf = [0 as u8; 2];
        let mut writer = Cursor::new(&mut buf[..]);
        assert_eq!(writer.write(&[0]).unwrap(), 1);
        assert_eq!(writer.write(&[0, 0]).unwrap(), 1);
        assert_eq!(writer.write(&[0, 0]).unwrap(), 0);
    }
    #[test]
    fn test_mem_reader() {
        let mut reader = Cursor::new(vec![0, 1, 2, 3, 4, 5, 6, 7]);
        let mut buf = [];
        assert_eq!(reader.read(&mut buf).unwrap(), 0);
        assert_eq!(reader.position(), 0);
        let mut buf = [0];
        assert_eq!(reader.read(&mut buf).unwrap(), 1);
        assert_eq!(reader.position(), 1);
        let b: &[_] = &[0];
        assert_eq!(buf, b);
        let mut buf = [0; 4];
        assert_eq!(reader.read(&mut buf).unwrap(), 4);
        assert_eq!(reader.position(), 5);
        let b: &[_] = &[1, 2, 3, 4];
        assert_eq!(buf, b);
        assert_eq!(reader.read(&mut buf).unwrap(), 3);
        let b: &[_] = &[5, 6, 7];
        assert_eq!(&buf[..3], b);
        assert_eq!(reader.read(&mut buf).unwrap(), 0);
    }
    #[test]
    fn test_boxed_slice_reader() {
        let mut reader = Cursor::new(vec![0, 1, 2, 3, 4, 5, 6, 7].into_boxed_slice());
        let mut buf = [];
        assert_eq!(reader.read(&mut buf).unwrap(), 0);
        assert_eq!(reader.position(), 0);
        let mut buf = [0];
        assert_eq!(reader.read(&mut buf).unwrap(), 1);
        assert_eq!(reader.position(), 1);
        let b: &[_] = &[0];
        assert_eq!(buf, b);
        let mut buf = [0; 4];
        assert_eq!(reader.read(&mut buf).unwrap(), 4);
        assert_eq!(reader.position(), 5);
        let b: &[_] = &[1, 2, 3, 4];
        assert_eq!(buf, b);
        assert_eq!(reader.read(&mut buf).unwrap(), 3);
        let b: &[_] = &[5, 6, 7];
        assert_eq!(&buf[..3], b);
        assert_eq!(reader.read(&mut buf).unwrap(), 0);
    }
    #[test]
    fn read_to_end() {
        let mut reader = Cursor::new(vec![0, 1, 2, 3, 4, 5, 6, 7]);
        let mut v = Vec::new();
        reader.read_to_end(&mut v).unwrap();
        assert_eq!(v, [0, 1, 2, 3, 4, 5, 6, 7]);
    }
    #[test]
    fn test_slice_reader() {
        let in_buf = vec![0, 1, 2, 3, 4, 5, 6, 7];
        let reader = &mut &in_buf[..];
        let mut buf = [];
        assert_eq!(reader.read(&mut buf).unwrap(), 0);
        let mut buf = [0];
        assert_eq!(reader.read(&mut buf).unwrap(), 1);
        assert_eq!(reader.len(), 7);
        let b: &[_] = &[0];
        assert_eq!(&buf[..], b);
        let mut buf = [0; 4];
        assert_eq!(reader.read(&mut buf).unwrap(), 4);
        assert_eq!(reader.len(), 3);
        let b: &[_] = &[1, 2, 3, 4];
        assert_eq!(&buf[..], b);
        assert_eq!(reader.read(&mut buf).unwrap(), 3);
        let b: &[_] = &[5, 6, 7];
        assert_eq!(&buf[..3], b);
        assert_eq!(reader.read(&mut buf).unwrap(), 0);
    }
    #[test]
    fn test_read_exact() {
        let in_buf = vec![0, 1, 2, 3, 4, 5, 6, 7];
        let reader = &mut &in_buf[..];
        let mut buf = [];
        assert!(reader.read_exact(&mut buf).is_ok());
        let mut buf = [8];
        assert!(reader.read_exact(&mut buf).is_ok());
        assert_eq!(buf[0], 0);
        assert_eq!(reader.len(), 7);
        let mut buf = [0, 0, 0, 0, 0, 0, 0];
        assert!(reader.read_exact(&mut buf).is_ok());
        assert_eq!(buf, [1, 2, 3, 4, 5, 6, 7]);
        assert_eq!(reader.len(), 0);
        let mut buf = [0];
        assert!(reader.read_exact(&mut buf).is_err());
    }
    #[test]
    fn test_buf_reader() {
        let in_buf = vec![0, 1, 2, 3, 4, 5, 6, 7];
        let mut reader = Cursor::new(&in_buf[..]);
        let mut buf = [];
        assert_eq!(reader.read(&mut buf).unwrap(), 0);
        assert_eq!(reader.position(), 0);
        let mut buf = [0];
        assert_eq!(reader.read(&mut buf).unwrap(), 1);
        assert_eq!(reader.position(), 1);
        let b: &[_] = &[0];
        assert_eq!(buf, b);
        let mut buf = [0; 4];
        assert_eq!(reader.read(&mut buf).unwrap(), 4);
        assert_eq!(reader.position(), 5);
        let b: &[_] = &[1, 2, 3, 4];
        assert_eq!(buf, b);
        assert_eq!(reader.read(&mut buf).unwrap(), 3);
        let b: &[_] = &[5, 6, 7];
        assert_eq!(&buf[..3], b);
        assert_eq!(reader.read(&mut buf).unwrap(), 0);
    }
    #[test]
    fn seek_past_end() {
        let buf = [0xff];
        let mut r = Cursor::new(&buf[..]);
        assert_eq!(r.seek(SeekFrom::Start(10)).unwrap(), 10);
        assert_eq!(r.read(&mut [0]).unwrap(), 0);
        let mut r = Cursor::new(vec![10]);
        assert_eq!(r.seek(SeekFrom::Start(10)).unwrap(), 10);
        assert_eq!(r.read(&mut [0]).unwrap(), 0);
        let mut buf = [0];
        let mut r = Cursor::new(&mut buf[..]);
        assert_eq!(r.seek(SeekFrom::Start(10)).unwrap(), 10);
        assert_eq!(r.write(&[3]).unwrap(), 0);
        let mut r = Cursor::new(vec![10].into_boxed_slice());
        assert_eq!(r.seek(SeekFrom::Start(10)).unwrap(), 10);
        assert_eq!(r.write(&[3]).unwrap(), 0);
    }
    #[test]
    fn seek_past_i64() {
        let buf = [0xff];
        let mut r = Cursor::new(&buf[..]);
        assert_eq!(r.seek(SeekFrom::Start(6)).unwrap(), 6);
        assert_eq!(r.seek(SeekFrom::Current(0x7ffffffffffffff0)).unwrap(), 0x7ffffffffffffff6);
        assert_eq!(r.seek(SeekFrom::Current(0x10)).unwrap(), 0x8000000000000006);
        assert_eq!(r.seek(SeekFrom::Current(0)).unwrap(), 0x8000000000000006);
        assert!(r.seek(SeekFrom::Current(0x7ffffffffffffffd)).is_err());
        assert_eq!(r.seek(SeekFrom::Current(-0x8000000000000000)).unwrap(), 6);
        let mut r = Cursor::new(vec![10]);
        assert_eq!(r.seek(SeekFrom::Start(6)).unwrap(), 6);
        assert_eq!(r.seek(SeekFrom::Current(0x7ffffffffffffff0)).unwrap(), 0x7ffffffffffffff6);
        assert_eq!(r.seek(SeekFrom::Current(0x10)).unwrap(), 0x8000000000000006);
        assert_eq!(r.seek(SeekFrom::Current(0)).unwrap(), 0x8000000000000006);
        assert!(r.seek(SeekFrom::Current(0x7ffffffffffffffd)).is_err());
        assert_eq!(r.seek(SeekFrom::Current(-0x8000000000000000)).unwrap(), 6);
        let mut buf = [0];
        let mut r = Cursor::new(&mut buf[..]);
        assert_eq!(r.seek(SeekFrom::Start(6)).unwrap(), 6);
        assert_eq!(r.seek(SeekFrom::Current(0x7ffffffffffffff0)).unwrap(), 0x7ffffffffffffff6);
        assert_eq!(r.seek(SeekFrom::Current(0x10)).unwrap(), 0x8000000000000006);
        assert_eq!(r.seek(SeekFrom::Current(0)).unwrap(), 0x8000000000000006);
        assert!(r.seek(SeekFrom::Current(0x7ffffffffffffffd)).is_err());
        assert_eq!(r.seek(SeekFrom::Current(-0x8000000000000000)).unwrap(), 6);
        let mut r = Cursor::new(vec![10].into_boxed_slice());
        assert_eq!(r.seek(SeekFrom::Start(6)).unwrap(), 6);
        assert_eq!(r.seek(SeekFrom::Current(0x7ffffffffffffff0)).unwrap(), 0x7ffffffffffffff6);
        assert_eq!(r.seek(SeekFrom::Current(0x10)).unwrap(), 0x8000000000000006);
        assert_eq!(r.seek(SeekFrom::Current(0)).unwrap(), 0x8000000000000006);
        assert!(r.seek(SeekFrom::Current(0x7ffffffffffffffd)).is_err());
        assert_eq!(r.seek(SeekFrom::Current(-0x8000000000000000)).unwrap(), 6);
    }
    #[test]
    fn seek_before_0() {
        let buf = [0xff];
        let mut r = Cursor::new(&buf[..]);
        assert!(r.seek(SeekFrom::End(-2)).is_err());
        let mut r = Cursor::new(vec![10]);
        assert!(r.seek(SeekFrom::End(-2)).is_err());
        let mut buf = [0];
        let mut r = Cursor::new(&mut buf[..]);
        assert!(r.seek(SeekFrom::End(-2)).is_err());
        let mut r = Cursor::new(vec![10].into_boxed_slice());
        assert!(r.seek(SeekFrom::End(-2)).is_err());
    }
    #[test]
    fn test_seekable_mem_writer() {
        let mut writer = Cursor::new(Vec::<u8>::new());
        assert_eq!(writer.position(), 0);
        assert_eq!(writer.write(&[0]).unwrap(), 1);
        assert_eq!(writer.position(), 1);
        assert_eq!(writer.write(&[1, 2, 3]).unwrap(), 3);
        assert_eq!(writer.write(&[4, 5, 6, 7]).unwrap(), 4);
        assert_eq!(writer.position(), 8);
        let b: &[_] = &[0, 1, 2, 3, 4, 5, 6, 7];
        assert_eq!(&writer.get_ref()[..], b);
        assert_eq!(writer.seek(SeekFrom::Start(0)).unwrap(), 0);
        assert_eq!(writer.position(), 0);
        assert_eq!(writer.write(&[3, 4]).unwrap(), 2);
        let b: &[_] = &[3, 4, 2, 3, 4, 5, 6, 7];
        assert_eq!(&writer.get_ref()[..], b);
        assert_eq!(writer.seek(SeekFrom::Current(1)).unwrap(), 3);
        assert_eq!(writer.write(&[0, 1]).unwrap(), 2);
        let b: &[_] = &[3, 4, 2, 0, 1, 5, 6, 7];
        assert_eq!(&writer.get_ref()[..], b);
        assert_eq!(writer.seek(SeekFrom::End(-1)).unwrap(), 7);
        assert_eq!(writer.write(&[1, 2]).unwrap(), 2);
        let b: &[_] = &[3, 4, 2, 0, 1, 5, 6, 1, 2];
        assert_eq!(&writer.get_ref()[..], b);
        assert_eq!(writer.seek(SeekFrom::End(1)).unwrap(), 10);
        assert_eq!(writer.write(&[1]).unwrap(), 1);
        let b: &[_] = &[3, 4, 2, 0, 1, 5, 6, 1, 2, 0, 1];
        assert_eq!(&writer.get_ref()[..], b);
    }
    #[test]
    fn vec_seek_past_end() {
        let mut r = Cursor::new(Vec::new());
        assert_eq!(r.seek(SeekFrom::Start(10)).unwrap(), 10);
        assert_eq!(r.write(&[3]).unwrap(), 1);
    }
    #[test]
    fn vec_seek_before_0() {
        let mut r = Cursor::new(Vec::new());
        assert!(r.seek(SeekFrom::End(-2)).is_err());
    }
    #[test]
    #[cfg(target_pointer_width = "32")]
    fn vec_seek_and_write_past_usize_max() {
        let mut c = Cursor::new(Vec::new());
        c.set_position(<usize>::max_value() as u64 + 1);
        assert!(c.write_all(&[1, 2, 3]).is_err());
    }
 }
--- a/ctr-std/src/io/error.rs
+++ b/ctr-std/src/io/error.rs
@ -1,620 +0,0 @@
 // Copyright 2015 The Rust Project Developers. See the COPYRIGHT
 // file at the top-level directory of this distribution and at
 // http://rust-lang.org/COPYRIGHT.
 //
 // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
 // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 use error;
 use fmt;
 use result;
 use sys;
 use convert::From;
 /// A specialized [`Result`](../result/enum.Result.html) type for I/O
 /// operations.
 ///
 /// This type is broadly used across [`std::io`] for any operation which may
 /// produce an error.
 ///
 /// This typedef is generally used to avoid writing out [`io::Error`] directly and
 /// is otherwise a direct mapping to [`Result`].
 ///
 /// While usual Rust style is to import types directly, aliases of [`Result`]
 /// often are not, to make it easier to distinguish between them. [`Result`] is
 /// generally assumed to be [`std::result::Result`][`Result`], and so users of this alias
 /// will generally use `io::Result` instead of shadowing the prelude's import
 /// of [`std::result::Result`][`Result`].
 ///
 /// [`std::io`]: ../io/index.html
 /// [`io::Error`]: ../io/struct.Error.html
 /// [`Result`]: ../result/enum.Result.html
 ///
 /// # Examples
 ///
 /// A convenience function that bubbles an `io::Result` to its caller:
 ///
 /// ```
 /// use std::io;
 ///
 /// fn get_string() -> io::Result<String> {
 ///     let mut buffer = String::new();
 ///
 ///     io::stdin().read_line(&mut buffer)?;
 ///
 ///     Ok(buffer)
 /// }
 /// ```
 #[stable(feature = "rust1", since = "1.0.0")]
 pub type Result<T> = result::Result<T, Error>;
 /// The error type for I/O operations of the [`Read`], [`Write`], [`Seek`], and
 /// associated traits.
 ///
 /// Errors mostly originate from the underlying OS, but custom instances of
 /// `Error` can be created with crafted error messages and a particular value of
 /// [`ErrorKind`].
 ///
 /// [`Read`]: ../io/trait.Read.html
 /// [`Write`]: ../io/trait.Write.html
 /// [`Seek`]: ../io/trait.Seek.html
 /// [`ErrorKind`]: enum.ErrorKind.html
 #[stable(feature = "rust1", since = "1.0.0")]
 pub struct Error {
    repr: Repr,
 }
 #[stable(feature = "rust1", since = "1.0.0")]
 impl fmt::Debug for Error {
    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
        fmt::Debug::fmt(&self.repr, f)
    }
 }
 enum Repr {
    Os(i32),
    Simple(ErrorKind),
    Custom(Box<Custom>),
 }
 #[derive(Debug)]
 struct Custom {
    kind: ErrorKind,
    error: Box<dyn error::Error+Send+Sync>,
 }
 /// A list specifying general categories of I/O error.
 ///
 /// This list is intended to grow over time and it is not recommended to
 /// exhaustively match against it.
 ///
 /// It is used with the [`io::Error`] type.
 ///
 /// [`io::Error`]: struct.Error.html
 #[derive(Clone, Copy, Debug, Eq, Hash, Ord, PartialEq, PartialOrd)]
 #[stable(feature = "rust1", since = "1.0.0")]
 #[allow(deprecated)]
 #[non_exhaustive]
 pub enum ErrorKind {
    /// An entity was not found, often a file.
    #[stable(feature = "rust1", since = "1.0.0")]
    NotFound,
    /// The operation lacked the necessary privileges to complete.
    #[stable(feature = "rust1", since = "1.0.0")]
    PermissionDenied,
    /// The connection was refused by the remote server.
    #[stable(feature = "rust1", since = "1.0.0")]
    ConnectionRefused,
    /// The connection was reset by the remote server.
    #[stable(feature = "rust1", since = "1.0.0")]
    ConnectionReset,
    /// The connection was aborted (terminated) by the remote server.
    #[stable(feature = "rust1", since = "1.0.0")]
    ConnectionAborted,
    /// The network operation failed because it was not connected yet.
    #[stable(feature = "rust1", since = "1.0.0")]
    NotConnected,
    /// A socket address could not be bound because the address is already in
    /// use elsewhere.
    #[stable(feature = "rust1", since = "1.0.0")]
    AddrInUse,
    /// A nonexistent interface was requested or the requested address was not
    /// local.
    #[stable(feature = "rust1", since = "1.0.0")]
    AddrNotAvailable,
    /// The operation failed because a pipe was closed.
    #[stable(feature = "rust1", since = "1.0.0")]
    BrokenPipe,
    /// An entity already exists, often a file.
    #[stable(feature = "rust1", since = "1.0.0")]
    AlreadyExists,
    /// The operation needs to block to complete, but the blocking operation was
    /// requested to not occur.
    #[stable(feature = "rust1", since = "1.0.0")]
    WouldBlock,
    /// A parameter was incorrect.
    #[stable(feature = "rust1", since = "1.0.0")]
    InvalidInput,
    /// Data not valid for the operation were encountered.
    ///
    /// Unlike [`InvalidInput`], this typically means that the operation
    /// parameters were valid, however the error was caused by malformed
    /// input data.
    ///
    /// For example, a function that reads a file into a string will error with
    /// `InvalidData` if the file's contents are not valid UTF-8.
    ///
    /// [`InvalidInput`]: #variant.InvalidInput
    #[stable(feature = "io_invalid_data", since = "1.2.0")]
    InvalidData,
    /// The I/O operation's timeout expired, causing it to be canceled.
    #[stable(feature = "rust1", since = "1.0.0")]
    TimedOut,
    /// An error returned when an operation could not be completed because a
    /// call to [`write`] returned [`Ok(0)`].
    ///
    /// This typically means that an operation could only succeed if it wrote a
    /// particular number of bytes but only a smaller number of bytes could be
    /// written.
    ///
    /// [`write`]: ../../std/io/trait.Write.html#tymethod.write
    /// [`Ok(0)`]: ../../std/io/type.Result.html
    #[stable(feature = "rust1", since = "1.0.0")]
    WriteZero,
    /// This operation was interrupted.
    ///
    /// Interrupted operations can typically be retried.
    #[stable(feature = "rust1", since = "1.0.0")]
    Interrupted,
    /// Any I/O error not part of this list.
    #[stable(feature = "rust1", since = "1.0.0")]
    Other,
    /// An error returned when an operation could not be completed because an
    /// "end of file" was reached prematurely.
    ///
    /// This typically means that an operation could only succeed if it read a
    /// particular number of bytes but only a smaller number of bytes could be
    /// read.
    #[stable(feature = "read_exact", since = "1.6.0")]
    UnexpectedEof,
 }
 impl ErrorKind {
    fn as_str(&self) -> &'static str {
        match *self {
            ErrorKind::NotFound => "entity not found",
            ErrorKind::PermissionDenied => "permission denied",
            ErrorKind::ConnectionRefused => "connection refused",
            ErrorKind::ConnectionReset => "connection reset",
            ErrorKind::ConnectionAborted => "connection aborted",
            ErrorKind::NotConnected => "not connected",
            ErrorKind::AddrInUse => "address in use",
            ErrorKind::AddrNotAvailable => "address not available",
            ErrorKind::BrokenPipe => "broken pipe",
            ErrorKind::AlreadyExists => "entity already exists",
            ErrorKind::WouldBlock => "operation would block",
            ErrorKind::InvalidInput => "invalid input parameter",
            ErrorKind::InvalidData => "invalid data",
            ErrorKind::TimedOut => "timed out",
            ErrorKind::WriteZero => "write zero",
            ErrorKind::Interrupted => "operation interrupted",
            ErrorKind::Other => "other os error",
            ErrorKind::UnexpectedEof => "unexpected end of file",
        }
    }
 }
 /// Intended for use for errors not exposed to the user, where allocating onto
 /// the heap (for normal construction via Error::new) is too costly.
 #[stable(feature = "io_error_from_errorkind", since = "1.14.0")]
 impl From<ErrorKind> for Error {
    #[inline]
    fn from(kind: ErrorKind) -> Error {
        Error {
            repr: Repr::Simple(kind)
        }
    }
 }
 impl Error {
    /// Creates a new I/O error from a known kind of error as well as an
    /// arbitrary error payload.
    ///
    /// This function is used to generically create I/O errors which do not
    /// originate from the OS itself. The `error` argument is an arbitrary
    /// payload which will be contained in this `Error`.
    ///
    /// # Examples
    ///
    /// ```
    /// use std::io::{Error, ErrorKind};
    ///
    /// // errors can be created from strings
    /// let custom_error = Error::new(ErrorKind::Other, "oh no!");
    ///
    /// // errors can also be created from other errors
    /// let custom_error2 = Error::new(ErrorKind::Interrupted, custom_error);
    /// ```
    #[stable(feature = "rust1", since = "1.0.0")]
    pub fn new<E>(kind: ErrorKind, error: E) -> Error
        where E: Into<Box<dyn error::Error+Send+Sync>>
    {
        Self::_new(kind, error.into())
    }
    fn _new(kind: ErrorKind, error: Box<dyn error::Error+Send+Sync>) -> Error {
        Error {
            repr: Repr::Custom(Box::new(Custom {
                kind,
                error,
            }))
        }
    }
    /// Returns an error representing the last OS error which occurred.
    ///
    /// This function reads the value of `errno` for the target platform (e.g.
    /// `GetLastError` on Windows) and will return a corresponding instance of
    /// `Error` for the error code.
    ///
    /// # Examples
    ///
    /// ```
    /// use std::io::Error;
    ///
    /// println!("last OS error: {:?}", Error::last_os_error());
    /// ```
    #[stable(feature = "rust1", since = "1.0.0")]
    pub fn last_os_error() -> Error {
        Error::from_raw_os_error(sys::os::errno() as i32)
    }
    /// Creates a new instance of an `Error` from a particular OS error code.
    ///
    /// # Examples
    ///
    /// On Linux:
    ///
    /// ```
    /// # if cfg!(target_os = "linux") {
    /// use std::io;
    ///
    /// let error = io::Error::from_raw_os_error(22);
    /// assert_eq!(error.kind(), io::ErrorKind::InvalidInput);
    /// # }
    /// ```
    ///
    /// On Windows:
    ///
    /// ```
    /// # if cfg!(windows) {
    /// use std::io;
    ///
    /// let error = io::Error::from_raw_os_error(10022);
    /// assert_eq!(error.kind(), io::ErrorKind::InvalidInput);
    /// # }
    /// ```
    #[stable(feature = "rust1", since = "1.0.0")]
    pub fn from_raw_os_error(code: i32) -> Error {
        Error { repr: Repr::Os(code) }
    }
    /// Returns the OS error that this error represents (if any).
    ///
    /// If this `Error` was constructed via `last_os_error` or
    /// `from_raw_os_error`, then this function will return `Some`, otherwise
    /// it will return `None`.
    ///
    /// # Examples
    ///
    /// ```
    /// use std::io::{Error, ErrorKind};
    ///
    /// fn print_os_error(err: &Error) {
    ///     if let Some(raw_os_err) = err.raw_os_error() {
    ///         println!("raw OS error: {:?}", raw_os_err);
    ///     } else {
    ///         println!("Not an OS error");
    ///     }
    /// }
    ///
    /// fn main() {
    ///     // Will print "raw OS error: ...".
    ///     print_os_error(&Error::last_os_error());
    ///     // Will print "Not an OS error".
    ///     print_os_error(&Error::new(ErrorKind::Other, "oh no!"));
    /// }
    /// ```
    #[stable(feature = "rust1", since = "1.0.0")]
    pub fn raw_os_error(&self) -> Option<i32> {
        match self.repr {
            Repr::Os(i) => Some(i),
            Repr::Custom(..) => None,
            Repr::Simple(..) => None,
        }
    }
    /// Returns a reference to the inner error wrapped by this error (if any).
    ///
    /// If this `Error` was constructed via `new` then this function will
    /// return `Some`, otherwise it will return `None`.
    ///
    /// # Examples
    ///
    /// ```
    /// use std::io::{Error, ErrorKind};
    ///
    /// fn print_error(err: &Error) {
    ///     if let Some(inner_err) = err.get_ref() {
    ///         println!("Inner error: {:?}", inner_err);
    ///     } else {
    ///         println!("No inner error");
    ///     }
    /// }
    ///
    /// fn main() {
    ///     // Will print "No inner error".
    ///     print_error(&Error::last_os_error());
    ///     // Will print "Inner error: ...".
    ///     print_error(&Error::new(ErrorKind::Other, "oh no!"));
    /// }
    /// ```
    #[stable(feature = "io_error_inner", since = "1.3.0")]
    pub fn get_ref(&self) -> Option<&(dyn error::Error+Send+Sync+'static)> {
        match self.repr {
            Repr::Os(..) => None,
            Repr::Simple(..) => None,
            Repr::Custom(ref c) => Some(&*c.error),
        }
    }
    /// Returns a mutable reference to the inner error wrapped by this error
    /// (if any).
    ///
    /// If this `Error` was constructed via `new` then this function will
    /// return `Some`, otherwise it will return `None`.
    ///
    /// # Examples
    ///
    /// ```
    /// use std::io::{Error, ErrorKind};
    /// use std::{error, fmt};
    /// use std::fmt::Display;
    ///
    /// #[derive(Debug)]
    /// struct MyError {
    ///     v: String,
    /// }
    ///
    /// impl MyError {
    ///     fn new() -> MyError {
    ///         MyError {
    ///             v: "oh no!".to_string()
    ///         }
    ///     }
    ///
    ///     fn change_message(&mut self, new_message: &str) {
    ///         self.v = new_message.to_string();
    ///     }
    /// }
    ///
    /// impl error::Error for MyError {
    ///     fn description(&self) -> &str { &self.v }
    /// }
    ///
    /// impl Display for MyError {
    ///     fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
    ///         write!(f, "MyError: {}", &self.v)
    ///     }
    /// }
    ///
    /// fn change_error(mut err: Error) -> Error {
    ///     if let Some(inner_err) = err.get_mut() {
    ///         inner_err.downcast_mut::<MyError>().unwrap().change_message("I've been changed!");
    ///     }
    ///     err
    /// }
    ///
    /// fn print_error(err: &Error) {
    ///     if let Some(inner_err) = err.get_ref() {
    ///         println!("Inner error: {}", inner_err);
    ///     } else {
    ///         println!("No inner error");
    ///     }
    /// }
    ///
    /// fn main() {
    ///     // Will print "No inner error".
    ///     print_error(&change_error(Error::last_os_error()));
    ///     // Will print "Inner error: ...".
    ///     print_error(&change_error(Error::new(ErrorKind::Other, MyError::new())));
    /// }
    /// ```
    #[stable(feature = "io_error_inner", since = "1.3.0")]
    pub fn get_mut(&mut self) -> Option<&mut (dyn error::Error+Send+Sync+'static)> {
        match self.repr {
            Repr::Os(..) => None,
            Repr::Simple(..) => None,
            Repr::Custom(ref mut c) => Some(&mut *c.error),
        }
    }
    /// Consumes the `Error`, returning its inner error (if any).
    ///
    /// If this `Error` was constructed via `new` then this function will
    /// return `Some`, otherwise it will return `None`.
    ///
    /// # Examples
    ///
    /// ```
    /// use std::io::{Error, ErrorKind};
    ///
    /// fn print_error(err: Error) {
    ///     if let Some(inner_err) = err.into_inner() {
    ///         println!("Inner error: {}", inner_err);
    ///     } else {
    ///         println!("No inner error");
    ///     }
    /// }
    ///
    /// fn main() {
    ///     // Will print "No inner error".
    ///     print_error(Error::last_os_error());
    ///     // Will print "Inner error: ...".
    ///     print_error(Error::new(ErrorKind::Other, "oh no!"));
    /// }
    /// ```
    #[stable(feature = "io_error_inner", since = "1.3.0")]
    pub fn into_inner(self) -> Option<Box<dyn error::Error+Send+Sync>> {
        match self.repr {
            Repr::Os(..) => None,
            Repr::Simple(..) => None,
            Repr::Custom(c) => Some(c.error)
        }
    }
    /// Returns the corresponding `ErrorKind` for this error.
    ///
    /// # Examples
    ///
    /// ```
    /// use std::io::{Error, ErrorKind};
    ///
    /// fn print_error(err: Error) {
    ///     println!("{:?}", err.kind());
    /// }
    ///
    /// fn main() {
    ///     // Will print "No inner error".
    ///     print_error(Error::last_os_error());
    ///     // Will print "Inner error: ...".
    ///     print_error(Error::new(ErrorKind::AddrInUse, "oh no!"));
    /// }
    /// ```
    #[stable(feature = "rust1", since = "1.0.0")]
    pub fn kind(&self) -> ErrorKind {
        match self.repr {
            Repr::Os(code) => sys::decode_error_kind(code),
            Repr::Custom(ref c) => c.kind,
            Repr::Simple(kind) => kind,
        }
    }
 }
 impl fmt::Debug for Repr {
    fn fmt(&self, fmt: &mut fmt::Formatter) -> fmt::Result {
        match *self {
            Repr::Os(code) =>
                fmt.debug_struct("Os")
                    .field("code", &code)
                    .field("kind", &sys::decode_error_kind(code))
                    .field("message", &sys::os::error_string(code)).finish(),
            Repr::Custom(ref c) => fmt::Debug::fmt(&c, fmt),
            Repr::Simple(kind) => fmt.debug_tuple("Kind").field(&kind).finish(),
        }
    }
 }
 #[stable(feature = "rust1", since = "1.0.0")]
 impl fmt::Display for Error {
    fn fmt(&self, fmt: &mut fmt::Formatter) -> fmt::Result {
        match self.repr {
            Repr::Os(code) => {
                let detail = sys::os::error_string(code);
                write!(fmt, "{} (os error {})", detail, code)
            }
            Repr::Custom(ref c) => c.error.fmt(fmt),
            Repr::Simple(kind) => write!(fmt, "{}", kind.as_str()),
        }
    }
 }
 #[stable(feature = "rust1", since = "1.0.0")]
 impl error::Error for Error {
    fn description(&self) -> &str {
        match self.repr {
            Repr::Os(..) | Repr::Simple(..) => self.kind().as_str(),
            Repr::Custom(ref c) => c.error.description(),
        }
    }
    fn cause(&self) -> Option<&dyn error::Error> {
        match self.repr {
            Repr::Os(..) => None,
            Repr::Simple(..) => None,
            Repr::Custom(ref c) => c.error.cause(),
        }
    }
 }
 fn _assert_error_is_sync_send() {
    fn _is_sync_send<T: Sync+Send>() {}
    _is_sync_send::<Error>();
 }
 #[cfg(test)]
 mod test {
    use super::{Error, ErrorKind, Repr, Custom};
    use error;
    use fmt;
    use sys::os::error_string;
    use sys::decode_error_kind;
    #[test]
    fn test_debug_error() {
        let code = 6;
        let msg = error_string(code);
        let kind = decode_error_kind(code);
        let err = Error {
            repr: Repr::Custom(box Custom {
                kind: ErrorKind::InvalidInput,
                error: box Error {
                    repr: super::Repr::Os(code)
                },
            })
        };
        let expected = format!(
            "Custom {{ \
                kind: InvalidInput, \
                error: Os {{ \
                    code: {:?}, \
                    kind: {:?}, \
                    message: {:?} \
                }} \
            }}",
            code, kind, msg
        );
        assert_eq!(format!("{:?}", err), expected);
    }
    #[test]
    fn test_downcasting() {
        #[derive(Debug)]
        struct TestError;
        impl fmt::Display for TestError {
            fn fmt(&self, _: &mut fmt::Formatter) -> fmt::Result {
                Ok(())
            }
        }
        impl error::Error for TestError {
            fn description(&self) -> &str {
                "asdf"
            }
        }
        // we have to call all of these UFCS style right now since method
        // resolution won't implicitly drop the Send+Sync bounds
        let mut err = Error::new(ErrorKind::Other, TestError);
        assert!(err.get_ref().unwrap().is::<TestError>());
        assert_eq!("asdf", err.get_ref().unwrap().description());
        assert!(err.get_mut().unwrap().is::<TestError>());
        let extracted = err.into_inner().unwrap();
        extracted.downcast::<TestError>().unwrap();
    }
 }
--- a/ctr-std/src/io/impls.rs
+++ b/ctr-std/src/io/impls.rs
@ -1,337 +0,0 @@
 // Copyright 2015 The Rust Project Developers. See the COPYRIGHT
 // file at the top-level directory of this distribution and at
 // http://rust-lang.org/COPYRIGHT.
 //
 // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
 // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 use cmp;
 use io::{self, SeekFrom, Read, Initializer, Write, Seek, BufRead, Error, ErrorKind};
 use fmt;
 use mem;
 // =============================================================================
 // Forwarding implementations
 #[stable(feature = "rust1", since = "1.0.0")]
 impl<'a, R: Read + ?Sized> Read for &'a mut R {
    #[inline]
    fn read(&mut self, buf: &mut [u8]) -> io::Result<usize> {
        (**self).read(buf)
    }
    #[inline]
    unsafe fn initializer(&self) -> Initializer {
        (**self).initializer()
    }
    #[inline]
    fn read_to_end(&mut self, buf: &mut Vec<u8>) -> io::Result<usize> {
        (**self).read_to_end(buf)
    }
    #[inline]
    fn read_to_string(&mut self, buf: &mut String) -> io::Result<usize> {
        (**self).read_to_string(buf)
    }
    #[inline]
    fn read_exact(&mut self, buf: &mut [u8]) -> io::Result<()> {
        (**self).read_exact(buf)
    }
 }
 #[stable(feature = "rust1", since = "1.0.0")]
 impl<'a, W: Write + ?Sized> Write for &'a mut W {
    #[inline]
    fn write(&mut self, buf: &[u8]) -> io::Result<usize> { (**self).write(buf) }
    #[inline]
    fn flush(&mut self) -> io::Result<()> { (**self).flush() }
    #[inline]
    fn write_all(&mut self, buf: &[u8]) -> io::Result<()> {
        (**self).write_all(buf)
    }
    #[inline]
    fn write_fmt(&mut self, fmt: fmt::Arguments) -> io::Result<()> {
        (**self).write_fmt(fmt)
    }
 }
 #[stable(feature = "rust1", since = "1.0.0")]
 impl<'a, S: Seek + ?Sized> Seek for &'a mut S {
    #[inline]
    fn seek(&mut self, pos: SeekFrom) -> io::Result<u64> { (**self).seek(pos) }
 }
 #[stable(feature = "rust1", since = "1.0.0")]
 impl<'a, B: BufRead + ?Sized> BufRead for &'a mut B {
    #[inline]
    fn fill_buf(&mut self) -> io::Result<&[u8]> { (**self).fill_buf() }
    #[inline]
    fn consume(&mut self, amt: usize) { (**self).consume(amt) }
    #[inline]
    fn read_until(&mut self, byte: u8, buf: &mut Vec<u8>) -> io::Result<usize> {
        (**self).read_until(byte, buf)
    }
    #[inline]
    fn read_line(&mut self, buf: &mut String) -> io::Result<usize> {
        (**self).read_line(buf)
    }
 }
 #[stable(feature = "rust1", since = "1.0.0")]
 impl<R: Read + ?Sized> Read for Box<R> {
    #[inline]
    fn read(&mut self, buf: &mut [u8]) -> io::Result<usize> {
        (**self).read(buf)
    }
    #[inline]
    unsafe fn initializer(&self) -> Initializer {
        (**self).initializer()
    }
    #[inline]
    fn read_to_end(&mut self, buf: &mut Vec<u8>) -> io::Result<usize> {
        (**self).read_to_end(buf)
    }
    #[inline]
    fn read_to_string(&mut self, buf: &mut String) -> io::Result<usize> {
        (**self).read_to_string(buf)
    }
    #[inline]
    fn read_exact(&mut self, buf: &mut [u8]) -> io::Result<()> {
        (**self).read_exact(buf)
    }
 }
 #[stable(feature = "rust1", since = "1.0.0")]
 impl<W: Write + ?Sized> Write for Box<W> {
    #[inline]
    fn write(&mut self, buf: &[u8]) -> io::Result<usize> { (**self).write(buf) }
    #[inline]
    fn flush(&mut self) -> io::Result<()> { (**self).flush() }
    #[inline]
    fn write_all(&mut self, buf: &[u8]) -> io::Result<()> {
        (**self).write_all(buf)
    }
    #[inline]
    fn write_fmt(&mut self, fmt: fmt::Arguments) -> io::Result<()> {
        (**self).write_fmt(fmt)
    }
 }
 #[stable(feature = "rust1", since = "1.0.0")]
 impl<S: Seek + ?Sized> Seek for Box<S> {
    #[inline]
    fn seek(&mut self, pos: SeekFrom) -> io::Result<u64> { (**self).seek(pos) }
 }
 #[stable(feature = "rust1", since = "1.0.0")]
 impl<B: BufRead + ?Sized> BufRead for Box<B> {
    #[inline]
    fn fill_buf(&mut self) -> io::Result<&[u8]> { (**self).fill_buf() }
    #[inline]
    fn consume(&mut self, amt: usize) { (**self).consume(amt) }
    #[inline]
    fn read_until(&mut self, byte: u8, buf: &mut Vec<u8>) -> io::Result<usize> {
        (**self).read_until(byte, buf)
    }
    #[inline]
    fn read_line(&mut self, buf: &mut String) -> io::Result<usize> {
        (**self).read_line(buf)
    }
 }
 // =============================================================================
 // In-memory buffer implementations
 /// Read is implemented for `&[u8]` by copying from the slice.
 ///
 /// Note that reading updates the slice to point to the yet unread part.
 /// The slice will be empty when EOF is reached.
 #[stable(feature = "rust1", since = "1.0.0")]
 impl<'a> Read for &'a [u8] {
    #[inline]
    fn read(&mut self, buf: &mut [u8]) -> io::Result<usize> {
        let amt = cmp::min(buf.len(), self.len());
        let (a, b) = self.split_at(amt);
        // First check if the amount of bytes we want to read is small:
        // `copy_from_slice` will generally expand to a call to `memcpy`, and
        // for a single byte the overhead is significant.
        if amt == 1 {
            buf[0] = a[0];
        } else {
            buf[..amt].copy_from_slice(a);
        }
        *self = b;
        Ok(amt)
    }
    #[inline]
    unsafe fn initializer(&self) -> Initializer {
        Initializer::nop()
    }
    #[inline]
    fn read_exact(&mut self, buf: &mut [u8]) -> io::Result<()> {
        if buf.len() > self.len() {
            return Err(Error::new(ErrorKind::UnexpectedEof,
                                  "failed to fill whole buffer"));
        }
        let (a, b) = self.split_at(buf.len());
        // First check if the amount of bytes we want to read is small:
        // `copy_from_slice` will generally expand to a call to `memcpy`, and
        // for a single byte the overhead is significant.
        if buf.len() == 1 {
            buf[0] = a[0];
        } else {
            buf.copy_from_slice(a);
        }
        *self = b;
        Ok(())
    }
    #[inline]
    fn read_to_end(&mut self, buf: &mut Vec<u8>) -> io::Result<usize> {
        buf.extend_from_slice(*self);
        let len = self.len();
        *self = &self[len..];
        Ok(len)
    }
 }
 #[stable(feature = "rust1", since = "1.0.0")]
 impl<'a> BufRead for &'a [u8] {
    #[inline]
    fn fill_buf(&mut self) -> io::Result<&[u8]> { Ok(*self) }
    #[inline]
    fn consume(&mut self, amt: usize) { *self = &self[amt..]; }
 }
 /// Write is implemented for `&mut [u8]` by copying into the slice, overwriting
 /// its data.
 ///
 /// Note that writing updates the slice to point to the yet unwritten part.
 /// The slice will be empty when it has been completely overwritten.
 #[stable(feature = "rust1", since = "1.0.0")]
 impl<'a> Write for &'a mut [u8] {
    #[inline]
    fn write(&mut self, data: &[u8]) -> io::Result<usize> {
        let amt = cmp::min(data.len(), self.len());
        let (a, b) = mem::replace(self, &mut []).split_at_mut(amt);
        a.copy_from_slice(&data[..amt]);
        *self = b;
        Ok(amt)
    }
    #[inline]
    fn write_all(&mut self, data: &[u8]) -> io::Result<()> {
        if self.write(data)? == data.len() {
            Ok(())
        } else {
            Err(Error::new(ErrorKind::WriteZero, "failed to write whole buffer"))
        }
    }
    #[inline]
    fn flush(&mut self) -> io::Result<()> { Ok(()) }
 }
 /// Write is implemented for `Vec<u8>` by appending to the vector.
 /// The vector will grow as needed.
 #[stable(feature = "rust1", since = "1.0.0")]
 impl Write for Vec<u8> {
    #[inline]
    fn write(&mut self, buf: &[u8]) -> io::Result<usize> {
        self.extend_from_slice(buf);
        Ok(buf.len())
    }
    #[inline]
    fn write_all(&mut self, buf: &[u8]) -> io::Result<()> {
        self.extend_from_slice(buf);
        Ok(())
    }
    #[inline]
    fn flush(&mut self) -> io::Result<()> { Ok(()) }
 }
 #[cfg(test)]
 mod tests {
    use io::prelude::*;
    use test;
    #[bench]
    fn bench_read_slice(b: &mut test::Bencher) {
        let buf = [5; 1024];
        let mut dst = [0; 128];
        b.iter(|| {
            let mut rd = &buf[..];
            for _ in 0..8 {
                let _ = rd.read(&mut dst);
                test::black_box(&dst);
            }
        })
    }
    #[bench]
    fn bench_write_slice(b: &mut test::Bencher) {
        let mut buf = [0; 1024];
        let src = [5; 128];
        b.iter(|| {
            let mut wr = &mut buf[..];
            for _ in 0..8 {
                let _ = wr.write_all(&src);
                test::black_box(&wr);
            }
        })
    }
    #[bench]
    fn bench_read_vec(b: &mut test::Bencher) {
        let buf = vec![5; 1024];
        let mut dst = [0; 128];
        b.iter(|| {
            let mut rd = &buf[..];
            for _ in 0..8 {
                let _ = rd.read(&mut dst);
                test::black_box(&dst);
            }
        })
    }
    #[bench]
    fn bench_write_vec(b: &mut test::Bencher) {
        let mut buf = Vec::with_capacity(1024);
        let src = [5; 128];
        b.iter(|| {
            let mut wr = &mut buf[..];
            for _ in 0..8 {
                let _ = wr.write_all(&src);
                test::black_box(&wr);
            }
        })
    }
 }
--- a/ctr-std/src/io/lazy.rs
+++ b/ctr-std/src/io/lazy.rs
@ -1,76 +0,0 @@
 // Copyright 2015 The Rust Project Developers. See the COPYRIGHT
 // file at the top-level directory of this distribution and at
 // http://rust-lang.org/COPYRIGHT.
 //
 // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
 // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 use cell::Cell;
 use ptr;
 use sync::Arc;
 use sys_common;
 use sys_common::mutex::Mutex;
 pub struct Lazy<T> {
    // We never call `lock.init()`, so it is UB to attempt to acquire this mutex reentrantly!
    lock: Mutex,
    ptr: Cell<*mut Arc<T>>,
    init: fn() -> Arc<T>,
 }
 #[inline]
 const fn done<T>() -> *mut Arc<T> { 1_usize as *mut _ }
 unsafe impl<T> Sync for Lazy<T> {}
 impl<T: Send + Sync + 'static> Lazy<T> {
    /// Safety: `init` must not call `get` on the variable that is being
    /// initialized.
    pub const unsafe fn new(init: fn() -> Arc<T>) -> Lazy<T> {
        Lazy {
            lock: Mutex::new(),
            ptr: Cell::new(ptr::null_mut()),
            init,
        }
    }
    pub fn get(&'static self) -> Option<Arc<T>> {
        unsafe {
            let _guard = self.lock.lock();
            let ptr = self.ptr.get();
            if ptr.is_null() {
                Some(self.init())
            } else if ptr == done() {
                None
            } else {
                Some((*ptr).clone())
            }
        }
    }
    // Must only be called with `lock` held
    unsafe fn init(&'static self) -> Arc<T> {
        // If we successfully register an at exit handler, then we cache the
        // `Arc` allocation in our own internal box (it will get deallocated by
        // the at exit handler). Otherwise we just return the freshly allocated
        // `Arc`.
        let registered = sys_common::at_exit(move || {
            let ptr = {
                let _guard = self.lock.lock();
                self.ptr.replace(done())
            };
            drop(Box::from_raw(ptr))
        });
        // This could reentrantly call `init` again, which is a problem
        // because our `lock` allows reentrancy!
        // That's why `new` is unsafe and requires the caller to ensure no reentrancy happens.
        let ret = (self.init)();
        if registered.is_ok() {
            self.ptr.set(Box::into_raw(Box::new(ret.clone())));
        }
        ret
    }
 }
--- a/ctr-std/src/io/mod.rs
+++ b/ctr-std/src/io/mod.rs
--- a/ctr-std/src/io/prelude.rs
+++ b/ctr-std/src/io/prelude.rs
@ -1,24 +0,0 @@
 // Copyright 2015 The Rust Project Developers. See the COPYRIGHT
 // file at the top-level directory of this distribution and at
 // http://rust-lang.org/COPYRIGHT.
 //
 // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
 // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 //! The I/O Prelude
 //!
 //! The purpose of this module is to alleviate imports of many common I/O traits
 //! by adding a glob import to the top of I/O heavy modules:
 //!
 //! ```
 //! # #![allow(unused_imports)]
 //! use std::io::prelude::*;
 //! ```
 #![stable(feature = "rust1", since = "1.0.0")]
 #[stable(feature = "rust1", since = "1.0.0")]
 pub use super::{Read, Write, BufRead, Seek};
--- a/ctr-std/src/io/stdio.rs
+++ b/ctr-std/src/io/stdio.rs
@ -1,764 +0,0 @@
 // Copyright 2015 The Rust Project Developers. See the COPYRIGHT
 // file at the top-level directory of this distribution and at
 // http://rust-lang.org/COPYRIGHT.
 //
 // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
 // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 use io::prelude::*;
 use cell::RefCell;
 use fmt;
 use io::lazy::Lazy;
 use io::{self, Initializer, BufReader, LineWriter};
 use sync::{Arc, Mutex, MutexGuard};
 use sys::stdio;
 use sys_common::remutex::{ReentrantMutex, ReentrantMutexGuard};
 use thread::LocalKey;
 /// Stdout used by print! and println! macros
 thread_local! {
    static LOCAL_STDOUT: RefCell<Option<Box<dyn Write + Send>>> = {
        RefCell::new(None)
    }
 }
 /// A handle to a raw instance of the standard input stream of this process.
 ///
 /// This handle is not synchronized or buffered in any fashion. Constructed via
 /// the `std::io::stdio::stdin_raw` function.
 struct StdinRaw(stdio::Stdin);
 /// A handle to a raw instance of the standard output stream of this process.
 ///
 /// This handle is not synchronized or buffered in any fashion. Constructed via
 /// the `std::io::stdio::stdout_raw` function.
 struct StdoutRaw(stdio::Stdout);
 /// A handle to a raw instance of the standard output stream of this process.
 ///
 /// This handle is not synchronized or buffered in any fashion. Constructed via
 /// the `std::io::stdio::stderr_raw` function.
 struct StderrRaw(stdio::Stderr);
 /// Constructs a new raw handle to the standard input of this process.
 ///
 /// The returned handle does not interact with any other handles created nor
 /// handles returned by `std::io::stdin`. Data buffered by the `std::io::stdin`
 /// handles is **not** available to raw handles returned from this function.
 ///
 /// The returned handle has no external synchronization or buffering.
 fn stdin_raw() -> io::Result<StdinRaw> { stdio::Stdin::new().map(StdinRaw) }
 /// Constructs a new raw handle to the standard output stream of this process.
 ///
 /// The returned handle does not interact with any other handles created nor
 /// handles returned by `std::io::stdout`. Note that data is buffered by the
 /// `std::io::stdout` handles so writes which happen via this raw handle may
 /// appear before previous writes.
 ///
 /// The returned handle has no external synchronization or buffering layered on
 /// top.
 fn stdout_raw() -> io::Result<StdoutRaw> { stdio::Stdout::new().map(StdoutRaw) }
 /// Constructs a new raw handle to the standard error stream of this process.
 ///
 /// The returned handle does not interact with any other handles created nor
 /// handles returned by `std::io::stderr`.
 ///
 /// The returned handle has no external synchronization or buffering layered on
 /// top.
 fn stderr_raw() -> io::Result<StderrRaw> { stdio::Stderr::new().map(StderrRaw) }
 impl Read for StdinRaw {
    fn read(&mut self, buf: &mut [u8]) -> io::Result<usize> { self.0.read(buf) }
    #[inline]
    unsafe fn initializer(&self) -> Initializer {
        Initializer::nop()
    }
 }
 impl Write for StdoutRaw {
    fn write(&mut self, buf: &[u8]) -> io::Result<usize> { self.0.write(buf) }
    fn flush(&mut self) -> io::Result<()> { self.0.flush() }
 }
 impl Write for StderrRaw {
    fn write(&mut self, buf: &[u8]) -> io::Result<usize> { self.0.write(buf) }
    fn flush(&mut self) -> io::Result<()> { self.0.flush() }
 }
 enum Maybe<T> {
    Real(T),
    Fake,
 }
 impl<W: io::Write> io::Write for Maybe<W> {
    fn write(&mut self, buf: &[u8]) -> io::Result<usize> {
        match *self {
            Maybe::Real(ref mut w) => handle_ebadf(w.write(buf), buf.len()),
            Maybe::Fake => Ok(buf.len())
        }
    }
    fn flush(&mut self) -> io::Result<()> {
        match *self {
            Maybe::Real(ref mut w) => handle_ebadf(w.flush(), ()),
            Maybe::Fake => Ok(())
        }
    }
 }
 impl<R: io::Read> io::Read for Maybe<R> {
    fn read(&mut self, buf: &mut [u8]) -> io::Result<usize> {
        match *self {
            Maybe::Real(ref mut r) => handle_ebadf(r.read(buf), 0),
            Maybe::Fake => Ok(0)
        }
    }
 }
 fn handle_ebadf<T>(r: io::Result<T>, default: T) -> io::Result<T> {
    match r {
        Err(ref e) if stdio::is_ebadf(e) => Ok(default),
        r => r
    }
 }
 /// A handle to the standard input stream of a process.
 ///
 /// Each handle is a shared reference to a global buffer of input data to this
 /// process. A handle can be `lock`'d to gain full access to [`BufRead`] methods
 /// (e.g. `.lines()`). Reads to this handle are otherwise locked with respect
 /// to other reads.
 ///
 /// This handle implements the `Read` trait, but beware that concurrent reads
 /// of `Stdin` must be executed with care.
 ///
 /// Created by the [`io::stdin`] method.
 ///
 /// [`io::stdin`]: fn.stdin.html
 /// [`BufRead`]: trait.BufRead.html
 #[stable(feature = "rust1", since = "1.0.0")]
 pub struct Stdin {
    inner: Arc<Mutex<BufReader<Maybe<StdinRaw>>>>,
 }
 /// A locked reference to the `Stdin` handle.
 ///
 /// This handle implements both the [`Read`] and [`BufRead`] traits, and
 /// is constructed via the [`Stdin::lock`] method.
 ///
 /// [`Read`]: trait.Read.html
 /// [`BufRead`]: trait.BufRead.html
 /// [`Stdin::lock`]: struct.Stdin.html#method.lock
 #[stable(feature = "rust1", since = "1.0.0")]
 pub struct StdinLock<'a> {
    inner: MutexGuard<'a, BufReader<Maybe<StdinRaw>>>,
 }
 /// Constructs a new handle to the standard input of the current process.
 ///
 /// Each handle returned is a reference to a shared global buffer whose access
 /// is synchronized via a mutex. If you need more explicit control over
 /// locking, see the [`lock() method`][lock].
 ///
 /// [lock]: struct.Stdin.html#method.lock
 ///
 /// # Examples
 ///
 /// Using implicit synchronization:
 ///
 /// ```no_run
 /// use std::io::{self, Read};
 ///
 /// fn main() -> io::Result<()> {
 ///     let mut buffer = String::new();
 ///     io::stdin().read_to_string(&mut buffer)?;
 ///     Ok(())
 /// }
 /// ```
 ///
 /// Using explicit synchronization:
 ///
 /// ```no_run
 /// use std::io::{self, Read};
 ///
 /// fn main() -> io::Result<()> {
 ///     let mut buffer = String::new();
 ///     let stdin = io::stdin();
 ///     let mut handle = stdin.lock();
 ///
 ///     handle.read_to_string(&mut buffer)?;
 ///     Ok(())
 /// }
 /// ```
 #[stable(feature = "rust1", since = "1.0.0")]
 pub fn stdin() -> Stdin {
    static INSTANCE: Lazy<Mutex<BufReader<Maybe<StdinRaw>>>> = unsafe { Lazy::new(stdin_init) };
    return Stdin {
        inner: INSTANCE.get().expect("cannot access stdin during shutdown"),
    };
    fn stdin_init() -> Arc<Mutex<BufReader<Maybe<StdinRaw>>>> {
        // This must not reentrantly access `INSTANCE`
        let stdin = match stdin_raw() {
            Ok(stdin) => Maybe::Real(stdin),
            _ => Maybe::Fake
        };
        Arc::new(Mutex::new(BufReader::with_capacity(stdio::STDIN_BUF_SIZE, stdin)))
    }
 }
 impl Stdin {
    /// Locks this handle to the standard input stream, returning a readable
    /// guard.
    ///
    /// The lock is released when the returned lock goes out of scope. The
    /// returned guard also implements the [`Read`] and [`BufRead`] traits for
    /// accessing the underlying data.
    ///
    /// [`Read`]: trait.Read.html
    /// [`BufRead`]: trait.BufRead.html
    ///
    /// # Examples
    ///
    /// ```no_run
    /// use std::io::{self, Read};
    ///
    /// fn main() -> io::Result<()> {
    ///     let mut buffer = String::new();
    ///     let stdin = io::stdin();
    ///     let mut handle = stdin.lock();
    ///
    ///     handle.read_to_string(&mut buffer)?;
    ///     Ok(())
    /// }
    /// ```
    #[stable(feature = "rust1", since = "1.0.0")]
    pub fn lock(&self) -> StdinLock {
        StdinLock { inner: self.inner.lock().unwrap_or_else(|e| e.into_inner()) }
    }
    /// Locks this handle and reads a line of input into the specified buffer.
    ///
    /// For detailed semantics of this method, see the documentation on
    /// [`BufRead::read_line`].
    ///
    /// [`BufRead::read_line`]: trait.BufRead.html#method.read_line
    ///
    /// # Examples
    ///
    /// ```no_run
    /// use std::io;
    ///
    /// let mut input = String::new();
    /// match io::stdin().read_line(&mut input) {
    ///     Ok(n) => {
    ///         println!("{} bytes read", n);
    ///         println!("{}", input);
    ///     }
    ///     Err(error) => println!("error: {}", error),
    /// }
    /// ```
    ///
    /// You can run the example one of two ways:
    ///
    /// - Pipe some text to it, e.g. `printf foo | path/to/executable`
    /// - Give it text interactively by running the executable directly,
    ///   in which case it will wait for the Enter key to be pressed before
    ///   continuing
    #[stable(feature = "rust1", since = "1.0.0")]
    pub fn read_line(&self, buf: &mut String) -> io::Result<usize> {
        self.lock().read_line(buf)
    }
 }
 #[stable(feature = "std_debug", since = "1.16.0")]
 impl fmt::Debug for Stdin {
    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
        f.pad("Stdin { .. }")
    }
 }
 #[stable(feature = "rust1", since = "1.0.0")]
 impl Read for Stdin {
    fn read(&mut self, buf: &mut [u8]) -> io::Result<usize> {
        self.lock().read(buf)
    }
    #[inline]
    unsafe fn initializer(&self) -> Initializer {
        Initializer::nop()
    }
    fn read_to_end(&mut self, buf: &mut Vec<u8>) -> io::Result<usize> {
        self.lock().read_to_end(buf)
    }
    fn read_to_string(&mut self, buf: &mut String) -> io::Result<usize> {
        self.lock().read_to_string(buf)
    }
    fn read_exact(&mut self, buf: &mut [u8]) -> io::Result<()> {
        self.lock().read_exact(buf)
    }
 }
 #[stable(feature = "rust1", since = "1.0.0")]
 impl<'a> Read for StdinLock<'a> {
    fn read(&mut self, buf: &mut [u8]) -> io::Result<usize> {
        self.inner.read(buf)
    }
    #[inline]
    unsafe fn initializer(&self) -> Initializer {
        Initializer::nop()
    }
 }
 #[stable(feature = "rust1", since = "1.0.0")]
 impl<'a> BufRead for StdinLock<'a> {
    fn fill_buf(&mut self) -> io::Result<&[u8]> { self.inner.fill_buf() }
    fn consume(&mut self, n: usize) { self.inner.consume(n) }
 }
 #[stable(feature = "std_debug", since = "1.16.0")]
 impl<'a> fmt::Debug for StdinLock<'a> {
    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
        f.pad("StdinLock { .. }")
    }
 }
 /// A handle to the global standard output stream of the current process.
 ///
 /// Each handle shares a global buffer of data to be written to the standard
 /// output stream. Access is also synchronized via a lock and explicit control
 /// over locking is available via the [`lock`] method.
 ///
 /// Created by the [`io::stdout`] method.
 ///
 /// [`lock`]: #method.lock
 /// [`io::stdout`]: fn.stdout.html
 #[stable(feature = "rust1", since = "1.0.0")]
 pub struct Stdout {
    // FIXME: this should be LineWriter or BufWriter depending on the state of
    //        stdout (tty or not). Note that if this is not line buffered it
    //        should also flush-on-panic or some form of flush-on-abort.
    inner: Arc<ReentrantMutex<RefCell<LineWriter<Maybe<StdoutRaw>>>>>,
 }
 /// A locked reference to the `Stdout` handle.
 ///
 /// This handle implements the [`Write`] trait, and is constructed via
 /// the [`Stdout::lock`] method.
 ///
 /// [`Write`]: trait.Write.html
 /// [`Stdout::lock`]: struct.Stdout.html#method.lock
 #[stable(feature = "rust1", since = "1.0.0")]
 pub struct StdoutLock<'a> {
    inner: ReentrantMutexGuard<'a, RefCell<LineWriter<Maybe<StdoutRaw>>>>,
 }
 /// Constructs a new handle to the standard output of the current process.
 ///
 /// Each handle returned is a reference to a shared global buffer whose access
 /// is synchronized via a mutex. If you need more explicit control over
 /// locking, see the [Stdout::lock] method.
 ///
 /// [Stdout::lock]: struct.Stdout.html#method.lock
 ///
 /// # Examples
 ///
 /// Using implicit synchronization:
 ///
 /// ```no_run
 /// use std::io::{self, Write};
 ///
 /// fn main() -> io::Result<()> {
 ///     io::stdout().write(b"hello world")?;
 ///
 ///     Ok(())
 /// }
 /// ```
 ///
 /// Using explicit synchronization:
 ///
 /// ```no_run
 /// use std::io::{self, Write};
 ///
 /// fn main() -> io::Result<()> {
 ///     let stdout = io::stdout();
 ///     let mut handle = stdout.lock();
 ///
 ///     handle.write(b"hello world")?;
 ///
 ///     Ok(())
 /// }
 /// ```
 #[stable(feature = "rust1", since = "1.0.0")]
 pub fn stdout() -> Stdout {
    static INSTANCE: Lazy<ReentrantMutex<RefCell<LineWriter<Maybe<StdoutRaw>>>>>
        = unsafe { Lazy::new(stdout_init) };
    return Stdout {
        inner: INSTANCE.get().expect("cannot access stdout during shutdown"),
    };
    fn stdout_init() -> Arc<ReentrantMutex<RefCell<LineWriter<Maybe<StdoutRaw>>>>> {
        // This must not reentrantly access `INSTANCE`
        let stdout = match stdout_raw() {
            Ok(stdout) => Maybe::Real(stdout),
            _ => Maybe::Fake,
        };
        Arc::new(ReentrantMutex::new(RefCell::new(LineWriter::new(stdout))))
    }
 }
 impl Stdout {
    /// Locks this handle to the standard output stream, returning a writable
    /// guard.
    ///
    /// The lock is released when the returned lock goes out of scope. The
    /// returned guard also implements the `Write` trait for writing data.
    ///
    /// # Examples
    ///
    /// ```no_run
    /// use std::io::{self, Write};
    ///
    /// fn main() -> io::Result<()> {
    ///     let stdout = io::stdout();
    ///     let mut handle = stdout.lock();
    ///
    ///     handle.write(b"hello world")?;
    ///
    ///     Ok(())
    /// }
    /// ```
    #[stable(feature = "rust1", since = "1.0.0")]
    pub fn lock(&self) -> StdoutLock {
        StdoutLock { inner: self.inner.lock().unwrap_or_else(|e| e.into_inner()) }
    }
 }
 #[stable(feature = "std_debug", since = "1.16.0")]
 impl fmt::Debug for Stdout {
    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
        f.pad("Stdout { .. }")
    }
 }
 #[stable(feature = "rust1", since = "1.0.0")]
 impl Write for Stdout {
    fn write(&mut self, buf: &[u8]) -> io::Result<usize> {
        self.lock().write(buf)
    }
    fn flush(&mut self) -> io::Result<()> {
        self.lock().flush()
    }
    fn write_all(&mut self, buf: &[u8]) -> io::Result<()> {
        self.lock().write_all(buf)
    }
    fn write_fmt(&mut self, args: fmt::Arguments) -> io::Result<()> {
        self.lock().write_fmt(args)
    }
 }
 #[stable(feature = "rust1", since = "1.0.0")]
 impl<'a> Write for StdoutLock<'a> {
    fn write(&mut self, buf: &[u8]) -> io::Result<usize> {
        self.inner.borrow_mut().write(buf)
    }
    fn flush(&mut self) -> io::Result<()> {
        self.inner.borrow_mut().flush()
    }
 }
 #[stable(feature = "std_debug", since = "1.16.0")]
 impl<'a> fmt::Debug for StdoutLock<'a> {
    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
        f.pad("StdoutLock { .. }")
    }
 }
 /// A handle to the standard error stream of a process.
 ///
 /// For more information, see the [`io::stderr`] method.
 ///
 /// [`io::stderr`]: fn.stderr.html
 #[stable(feature = "rust1", since = "1.0.0")]
 pub struct Stderr {
    inner: Arc<ReentrantMutex<RefCell<Maybe<StderrRaw>>>>,
 }
 /// A locked reference to the `Stderr` handle.
 ///
 /// This handle implements the `Write` trait and is constructed via
 /// the [`Stderr::lock`] method.
 ///
 /// [`Stderr::lock`]: struct.Stderr.html#method.lock
 #[stable(feature = "rust1", since = "1.0.0")]
 pub struct StderrLock<'a> {
    inner: ReentrantMutexGuard<'a, RefCell<Maybe<StderrRaw>>>,
 }
 /// Constructs a new handle to the standard error of the current process.
 ///
 /// This handle is not buffered.
 ///
 /// # Examples
 ///
 /// Using implicit synchronization:
 ///
 /// ```no_run
 /// use std::io::{self, Write};
 ///
 /// fn main() -> io::Result<()> {
 ///     io::stderr().write(b"hello world")?;
 ///
 ///     Ok(())
 /// }
 /// ```
 ///
 /// Using explicit synchronization:
 ///
 /// ```no_run
 /// use std::io::{self, Write};
 ///
 /// fn main() -> io::Result<()> {
 ///     let stderr = io::stderr();
 ///     let mut handle = stderr.lock();
 ///
 ///     handle.write(b"hello world")?;
 ///
 ///     Ok(())
 /// }
 /// ```
 #[stable(feature = "rust1", since = "1.0.0")]
 pub fn stderr() -> Stderr {
    static INSTANCE: Lazy<ReentrantMutex<RefCell<Maybe<StderrRaw>>>> =
        unsafe { Lazy::new(stderr_init) };
    return Stderr {
        inner: INSTANCE.get().expect("cannot access stderr during shutdown"),
    };
    fn stderr_init() -> Arc<ReentrantMutex<RefCell<Maybe<StderrRaw>>>> {
        // This must not reentrantly access `INSTANCE`
        let stderr = match stderr_raw() {
            Ok(stderr) => Maybe::Real(stderr),
            _ => Maybe::Fake,
        };
        Arc::new(ReentrantMutex::new(RefCell::new(stderr)))
    }
 }
 impl Stderr {
    /// Locks this handle to the standard error stream, returning a writable
    /// guard.
    ///
    /// The lock is released when the returned lock goes out of scope. The
    /// returned guard also implements the `Write` trait for writing data.
    ///
    /// # Examples
    ///
    /// ```
    /// use std::io::{self, Write};
    ///
    /// fn foo() -> io::Result<()> {
    ///     let stderr = io::stderr();
    ///     let mut handle = stderr.lock();
    ///
    ///     handle.write(b"hello world")?;
    ///
    ///     Ok(())
    /// }
    /// ```
    #[stable(feature = "rust1", since = "1.0.0")]
    pub fn lock(&self) -> StderrLock {
        StderrLock { inner: self.inner.lock().unwrap_or_else(|e| e.into_inner()) }
    }
 }
 #[stable(feature = "std_debug", since = "1.16.0")]
 impl fmt::Debug for Stderr {
    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
        f.pad("Stderr { .. }")
    }
 }
 #[stable(feature = "rust1", since = "1.0.0")]
 impl Write for Stderr {
    fn write(&mut self, buf: &[u8]) -> io::Result<usize> {
        self.lock().write(buf)
    }
    fn flush(&mut self) -> io::Result<()> {
        self.lock().flush()
    }
    fn write_all(&mut self, buf: &[u8]) -> io::Result<()> {
        self.lock().write_all(buf)
    }
    fn write_fmt(&mut self, args: fmt::Arguments) -> io::Result<()> {
        self.lock().write_fmt(args)
    }
 }
 #[stable(feature = "rust1", since = "1.0.0")]
 impl<'a> Write for StderrLock<'a> {
    fn write(&mut self, buf: &[u8]) -> io::Result<usize> {
        self.inner.borrow_mut().write(buf)
    }
    fn flush(&mut self) -> io::Result<()> {
        self.inner.borrow_mut().flush()
    }
 }
 #[stable(feature = "std_debug", since = "1.16.0")]
 impl<'a> fmt::Debug for StderrLock<'a> {
    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
        f.pad("StderrLock { .. }")
    }
 }
 /// Resets the thread-local stderr handle to the specified writer
 ///
 /// This will replace the current thread's stderr handle, returning the old
 /// handle. All future calls to `panic!` and friends will emit their output to
 /// this specified handle.
 ///
 /// Note that this does not need to be called for all new threads; the default
 /// output handle is to the process's stderr stream.
 #[unstable(feature = "set_stdio",
           reason = "this function may disappear completely or be replaced \
                     with a more general mechanism",
           issue = "0")]
 #[doc(hidden)]
 pub fn set_panic(sink: Option<Box<dyn Write + Send>>) -> Option<Box<dyn Write + Send>> {
    use panicking::LOCAL_STDERR;
    use mem;
    LOCAL_STDERR.with(move |slot| {
        mem::replace(&mut *slot.borrow_mut(), sink)
    }).and_then(|mut s| {
        let _ = s.flush();
        Some(s)
    })
 }
 /// Resets the thread-local stdout handle to the specified writer
 ///
 /// This will replace the current thread's stdout handle, returning the old
 /// handle. All future calls to `print!` and friends will emit their output to
 /// this specified handle.
 ///
 /// Note that this does not need to be called for all new threads; the default
 /// output handle is to the process's stdout stream.
 #[unstable(feature = "set_stdio",
           reason = "this function may disappear completely or be replaced \
                     with a more general mechanism",
           issue = "0")]
 #[doc(hidden)]
 pub fn set_print(sink: Option<Box<dyn Write + Send>>) -> Option<Box<dyn Write + Send>> {
    use mem;
    LOCAL_STDOUT.with(move |slot| {
        mem::replace(&mut *slot.borrow_mut(), sink)
    }).and_then(|mut s| {
        let _ = s.flush();
        Some(s)
    })
 }
 /// Write `args` to output stream `local_s` if possible, `global_s`
 /// otherwise. `label` identifies the stream in a panic message.
 ///
 /// This function is used to print error messages, so it takes extra
 /// care to avoid causing a panic when `local_stream` is unusable.
 /// For instance, if the TLS key for the local stream is
 /// already destroyed, or if the local stream is locked by another
 /// thread, it will just fall back to the global stream.
 ///
 /// However, if the actual I/O causes an error, this function does panic.
 fn print_to<T>(
    args: fmt::Arguments,
    local_s: &'static LocalKey<RefCell<Option<Box<dyn Write+Send>>>>,
    global_s: fn() -> T,
    label: &str,
 )
 where
    T: Write,
 {
    let result = local_s.try_with(|s| {
        if let Ok(mut borrowed) = s.try_borrow_mut() {
            if let Some(w) = borrowed.as_mut() {
                return w.write_fmt(args);
            }
        }
        global_s().write_fmt(args)
    }).unwrap_or_else(|_| {
        global_s().write_fmt(args)
    });
    if let Err(e) = result {
        panic!("failed printing to {}: {}", label, e);
    }
 }
 #[unstable(feature = "print_internals",
           reason = "implementation detail which may disappear or be replaced at any time",
           issue = "0")]
 #[doc(hidden)]
 pub fn _print(args: fmt::Arguments) {
    print_to(args, &LOCAL_STDOUT, stdout, "stdout");
 }
 #[unstable(feature = "print_internals",
           reason = "implementation detail which may disappear or be replaced at any time",
           issue = "0")]
 #[doc(hidden)]
 pub fn _eprint(args: fmt::Arguments) {
    use panicking::LOCAL_STDERR;
    print_to(args, &LOCAL_STDERR, stderr, "stderr");
 }
 #[cfg(test)]
 mod tests {
    use panic::{UnwindSafe, RefUnwindSafe};
    use thread;
    use super::*;
    #[test]
    fn stdout_unwind_safe() {
        assert_unwind_safe::<Stdout>();
    }
    #[test]
    fn stdoutlock_unwind_safe() {
        assert_unwind_safe::<StdoutLock>();
        assert_unwind_safe::<StdoutLock<'static>>();
    }
    #[test]
    fn stderr_unwind_safe() {
        assert_unwind_safe::<Stderr>();
    }
    #[test]
    fn stderrlock_unwind_safe() {
        assert_unwind_safe::<StderrLock>();
        assert_unwind_safe::<StderrLock<'static>>();
    }
    fn assert_unwind_safe<T: UnwindSafe + RefUnwindSafe>() {}
    #[test]
    #[cfg_attr(target_os = "emscripten", ignore)]
    fn panic_doesnt_poison() {
        thread::spawn(|| {
            let _a = stdin();
            let _a = _a.lock();
            let _a = stdout();
            let _a = _a.lock();
            let _a = stderr();
            let _a = _a.lock();
            panic!();
        }).join().unwrap_err();
        let _a = stdin();
        let _a = _a.lock();
        let _a = stdout();
        let _a = _a.lock();
        let _a = stderr();
        let _a = _a.lock();
    }
 }
--- a/ctr-std/src/io/util.rs
+++ b/ctr-std/src/io/util.rs
@ -1,261 +0,0 @@
 // Copyright 2014 The Rust Project Developers. See the COPYRIGHT
 // file at the top-level directory of this distribution and at
 // http://rust-lang.org/COPYRIGHT.
 //
 // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
 // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 #![allow(missing_copy_implementations)]
 use fmt;
 use io::{self, Read, Initializer, Write, ErrorKind, BufRead};
 use mem;
 /// Copies the entire contents of a reader into a writer.
 ///
 /// This function will continuously read data from `reader` and then
 /// write it into `writer` in a streaming fashion until `reader`
 /// returns EOF.
 ///
 /// On success, the total number of bytes that were copied from
 /// `reader` to `writer` is returned.
 ///
 /// # Errors
 ///
 /// This function will return an error immediately if any call to `read` or
 /// `write` returns an error. All instances of `ErrorKind::Interrupted` are
 /// handled by this function and the underlying operation is retried.
 ///
 /// # Examples
 ///
 /// ```
 /// use std::io;
 ///
 /// fn main() -> io::Result<()> {
 ///     let mut reader: &[u8] = b"hello";
 ///     let mut writer: Vec<u8> = vec![];
 ///
 ///     io::copy(&mut reader, &mut writer)?;
 ///
 ///     assert_eq!(&b"hello"[..], &writer[..]);
 ///     Ok(())
 /// }
 /// ```
 #[stable(feature = "rust1", since = "1.0.0")]
 pub fn copy<R: ?Sized, W: ?Sized>(reader: &mut R, writer: &mut W) -> io::Result<u64>
    where R: Read, W: Write
 {
    let mut buf = unsafe {
        let mut buf: [u8; super::DEFAULT_BUF_SIZE] = mem::uninitialized();
        reader.initializer().initialize(&mut buf);
        buf
    };
    let mut written = 0;
    loop {
        let len = match reader.read(&mut buf) {
            Ok(0) => return Ok(written),
            Ok(len) => len,
            Err(ref e) if e.kind() == ErrorKind::Interrupted => continue,
            Err(e) => return Err(e),
        };
        writer.write_all(&buf[..len])?;
        written += len as u64;
    }
 }
 /// A reader which is always at EOF.
 ///
 /// This struct is generally created by calling [`empty`]. Please see
 /// the documentation of [`empty()`][`empty`] for more details.
 ///
 /// [`empty`]: fn.empty.html
 #[stable(feature = "rust1", since = "1.0.0")]
 pub struct Empty { _priv: () }
 /// Constructs a new handle to an empty reader.
 ///
 /// All reads from the returned reader will return [`Ok`]`(0)`.
 ///
 /// [`Ok`]: ../result/enum.Result.html#variant.Ok
 ///
 /// # Examples
 ///
 /// A slightly sad example of not reading anything into a buffer:
 ///
 /// ```
 /// use std::io::{self, Read};
 ///
 /// let mut buffer = String::new();
 /// io::empty().read_to_string(&mut buffer).unwrap();
 /// assert!(buffer.is_empty());
 /// ```
 #[stable(feature = "rust1", since = "1.0.0")]
 pub fn empty() -> Empty { Empty { _priv: () } }
 #[stable(feature = "rust1", since = "1.0.0")]
 impl Read for Empty {
    #[inline]
    fn read(&mut self, _buf: &mut [u8]) -> io::Result<usize> { Ok(0) }
    #[inline]
    unsafe fn initializer(&self) -> Initializer {
        Initializer::nop()
    }
 }
 #[stable(feature = "rust1", since = "1.0.0")]
 impl BufRead for Empty {
    #[inline]
    fn fill_buf(&mut self) -> io::Result<&[u8]> { Ok(&[]) }
    #[inline]
    fn consume(&mut self, _n: usize) {}
 }
 #[stable(feature = "std_debug", since = "1.16.0")]
 impl fmt::Debug for Empty {
    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
        f.pad("Empty { .. }")
    }
 }
 /// A reader which yields one byte over and over and over and over and over and...
 ///
 /// This struct is generally created by calling [`repeat`][repeat]. Please
 /// see the documentation of `repeat()` for more details.
 ///
 /// [repeat]: fn.repeat.html
 #[stable(feature = "rust1", since = "1.0.0")]
 pub struct Repeat { byte: u8 }
 /// Creates an instance of a reader that infinitely repeats one byte.
 ///
 /// All reads from this reader will succeed by filling the specified buffer with
 /// the given byte.
 ///
 /// # Examples
 ///
 /// ```
 /// use std::io::{self, Read};
 ///
 /// let mut buffer = [0; 3];
 /// io::repeat(0b101).read_exact(&mut buffer).unwrap();
 /// assert_eq!(buffer, [0b101, 0b101, 0b101]);
 /// ```
 #[stable(feature = "rust1", since = "1.0.0")]
 pub fn repeat(byte: u8) -> Repeat { Repeat { byte: byte } }
 #[stable(feature = "rust1", since = "1.0.0")]
 impl Read for Repeat {
    #[inline]
    fn read(&mut self, buf: &mut [u8]) -> io::Result<usize> {
        for slot in &mut *buf {
            *slot = self.byte;
        }
        Ok(buf.len())
    }
    #[inline]
    unsafe fn initializer(&self) -> Initializer {
        Initializer::nop()
    }
 }
 #[stable(feature = "std_debug", since = "1.16.0")]
 impl fmt::Debug for Repeat {
    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
        f.pad("Repeat { .. }")
    }
 }
 /// A writer which will move data into the void.
 ///
 /// This struct is generally created by calling [`sink`][sink]. Please
 /// see the documentation of `sink()` for more details.
 ///
 /// [sink]: fn.sink.html
 #[stable(feature = "rust1", since = "1.0.0")]
 pub struct Sink { _priv: () }
 /// Creates an instance of a writer which will successfully consume all data.
 ///
 /// All calls to `write` on the returned instance will return `Ok(buf.len())`
 /// and the contents of the buffer will not be inspected.
 ///
 /// # Examples
 ///
 /// ```rust
 /// use std::io::{self, Write};
 ///
 /// let buffer = vec![1, 2, 3, 5, 8];
 /// let num_bytes = io::sink().write(&buffer).unwrap();
 /// assert_eq!(num_bytes, 5);
 /// ```
 #[stable(feature = "rust1", since = "1.0.0")]
 pub fn sink() -> Sink { Sink { _priv: () } }
 #[stable(feature = "rust1", since = "1.0.0")]
 impl Write for Sink {
    #[inline]
    fn write(&mut self, buf: &[u8]) -> io::Result<usize> { Ok(buf.len()) }
    #[inline]
    fn flush(&mut self) -> io::Result<()> { Ok(()) }
 }
 #[stable(feature = "std_debug", since = "1.16.0")]
 impl fmt::Debug for Sink {
    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
        f.pad("Sink { .. }")
    }
 }
 #[cfg(test)]
 mod tests {
    use io::prelude::*;
    use io::{copy, sink, empty, repeat};
    #[test]
    fn copy_copies() {
        let mut r = repeat(0).take(4);
        let mut w = sink();
        assert_eq!(copy(&mut r, &mut w).unwrap(), 4);
        let mut r = repeat(0).take(1 << 17);
        assert_eq!(copy(&mut r as &mut dyn Read, &mut w as &mut dyn Write).unwrap(), 1 << 17);
    }
    #[test]
    fn sink_sinks() {
        let mut s = sink();
        assert_eq!(s.write(&[]).unwrap(), 0);
        assert_eq!(s.write(&[0]).unwrap(), 1);
        assert_eq!(s.write(&[0; 1024]).unwrap(), 1024);
        assert_eq!(s.by_ref().write(&[0; 1024]).unwrap(), 1024);
    }
    #[test]
    fn empty_reads() {
        let mut e = empty();
        assert_eq!(e.read(&mut []).unwrap(), 0);
        assert_eq!(e.read(&mut [0]).unwrap(), 0);
        assert_eq!(e.read(&mut [0; 1024]).unwrap(), 0);
        assert_eq!(e.by_ref().read(&mut [0; 1024]).unwrap(), 0);
    }
    #[test]
    fn repeat_repeats() {
        let mut r = repeat(4);
        let mut b = [0; 1024];
        assert_eq!(r.read(&mut b).unwrap(), 1024);
        assert!(b.iter().all(|b| *b == 4));
    }
    #[test]
    fn take_some_bytes() {
        assert_eq!(repeat(4).take(100).bytes().count(), 100);
        assert_eq!(repeat(4).take(100).bytes().next().unwrap().unwrap(), 4);
        assert_eq!(repeat(1).take(10).chain(repeat(2).take(10)).bytes().count(), 20);
    }
 }
--- a/ctr-std/src/keyword_docs.rs
+++ b/ctr-std/src/keyword_docs.rs
@ -1,58 +0,0 @@
 // Copyright 2018 The Rust Project Developers. See the COPYRIGHT
 // file at the top-level directory of this distribution and at
 // http://rust-lang.org/COPYRIGHT.
 //
 // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
 // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 #[doc(keyword = "fn")]
 //
 /// The `fn` keyword.
 ///
 /// The `fn` keyword is used to declare a function.
 ///
 /// Example:
 ///
 /// ```rust
 /// fn some_function() {
 ///     // code goes in here
 /// }
 /// ```
 ///
 /// For more information about functions, take a look at the [Rust Book][book].
 ///
 /// [book]: https://doc.rust-lang.org/book/second-edition/ch03-03-how-functions-work.html
 mod fn_keyword { }
 #[doc(keyword = "let")]
 //
 /// The `let` keyword.
 ///
 /// The `let` keyword is used to declare a variable.
 ///
 /// Example:
 ///
 /// ```rust
 /// # #![allow(unused_assignments)]
 /// let x = 3; // We create a variable named `x` with the value `3`.
 /// ```
 ///
 /// By default, all variables are **not** mutable. If you want a mutable variable,
 /// you'll have to use the `mut` keyword.
 ///
 /// Example:
 ///
 /// ```rust
 /// # #![allow(unused_assignments)]
 /// let mut x = 3; // We create a mutable variable named `x` with the value `3`.
 ///
 /// x += 4; // `x` is now equal to `7`.
 /// ```
 ///
 /// For more information about the `let` keyword, take a look at the [Rust Book][book].
 ///
 /// [book]: https://doc.rust-lang.org/book/second-edition/ch03-01-variables-and-mutability.html
 mod let_keyword { }
--- a/ctr-std/src/lib.rs
+++ b/ctr-std/src/lib.rs
@ -1,514 +0,0 @@
 // Copyright 2012-2014 The Rust Project Developers. See the COPYRIGHT
 // file at the top-level directory of this distribution and at
 // http://rust-lang.org/COPYRIGHT.
 //
 // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
 // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 //! # The Rust Standard Library
 //!
 //! The Rust Standard Library is the foundation of portable Rust software, a
 //! set of minimal and battle-tested shared abstractions for the [broader Rust
 //! ecosystem][crates.io]. It offers core types, like [`Vec<T>`] and
 //! [`Option<T>`], library-defined [operations on language
 //! primitives](#primitives), [standard macros](#macros), [I/O] and
 //! [multithreading], among [many other things][other].
 //!
 //! `std` is available to all Rust crates by default, just as if each one
 //! contained an `extern crate std;` import at the [crate root]. Therefore the
 //! standard library can be accessed in [`use`] statements through the path
 //! `std`, as in [`use std::env`], or in expressions through the absolute path
 //! `::std`, as in [`::std::env::args`].
 //!
 //! # How to read this documentation
 //!
 //! If you already know the name of what you are looking for, the fastest way to
 //! find it is to use the <a href="#" onclick="focusSearchBar();">search
 //! bar</a> at the top of the page.
 //!
 //! Otherwise, you may want to jump to one of these useful sections:
 //!
 //! * [`std::*` modules](#modules)
 //! * [Primitive types](#primitives)
 //! * [Standard macros](#macros)
 //! * [The Rust Prelude](prelude/index.html)
 //!
 //! If this is your first time, the documentation for the standard library is
 //! written to be casually perused. Clicking on interesting things should
 //! generally lead you to interesting places. Still, there are important bits
 //! you don't want to miss, so read on for a tour of the standard library and
 //! its documentation!
 //!
 //! Once you are familiar with the contents of the standard library you may
 //! begin to find the verbosity of the prose distracting. At this stage in your
 //! development you may want to press the `[-]` button near the top of the
 //! page to collapse it into a more skimmable view.
 //!
 //! While you are looking at that `[-]` button also notice the `[src]`
 //! button. Rust's API documentation comes with the source code and you are
 //! encouraged to read it. The standard library source is generally high
 //! quality and a peek behind the curtains is often enlightening.
 //!
 //! # What is in the standard library documentation?
 //!
 //! First of all, The Rust Standard Library is divided into a number of focused
 //! modules, [all listed further down this page](#modules). These modules are
 //! the bedrock upon which all of Rust is forged, and they have mighty names
 //! like [`std::slice`] and [`std::cmp`]. Modules' documentation typically
 //! includes an overview of the module along with examples, and are a smart
 //! place to start familiarizing yourself with the library.
 //!
 //! Second, implicit methods on [primitive types] are documented here. This can
 //! be a source of confusion for two reasons:
 //!
 //! 1. While primitives are implemented by the compiler, the standard library
 //!    implements methods directly on the primitive types (and it is the only
 //!    library that does so), which are [documented in the section on
 //!    primitives](#primitives).
 //! 2. The standard library exports many modules *with the same name as
 //!    primitive types*. These define additional items related to the primitive
 //!    type, but not the all-important methods.
 //!
 //! So for example there is a [page for the primitive type
 //! `i32`](primitive.i32.html) that lists all the methods that can be called on
 //! 32-bit integers (very useful), and there is a [page for the module
 //! `std::i32`](i32/index.html) that documents the constant values [`MIN`] and
 //! [`MAX`](i32/constant.MAX.html) (rarely useful).
 //!
 //! Note the documentation for the primitives [`str`] and [`[T]`][slice] (also
 //! called 'slice'). Many method calls on [`String`] and [`Vec<T>`] are actually
 //! calls to methods on [`str`] and [`[T]`][slice] respectively, via [deref
 //! coercions][deref-coercions].
 //!
 //! Third, the standard library defines [The Rust Prelude], a small collection
 //! of items - mostly traits - that are imported into every module of every
 //! crate. The traits in the prelude are pervasive, making the prelude
 //! documentation a good entry point to learning about the library.
 //!
 //! And finally, the standard library exports a number of standard macros, and
 //! [lists them on this page](#macros) (technically, not all of the standard
 //! macros are defined by the standard library - some are defined by the
 //! compiler - but they are documented here the same). Like the prelude, the
 //! standard macros are imported by default into all crates.
 //!
 //! # Contributing changes to the documentation
 //!
 //! Check out the rust contribution guidelines [here](
 //! https://github.com/rust-lang/rust/blob/master/CONTRIBUTING.md).
 //! The source for this documentation can be found on [Github](https://github.com/rust-lang).
 //! To contribute changes, make sure you read the guidelines first, then submit
 //! pull-requests for your suggested changes.
 //!
 //! Contributions are appreciated! If you see a part of the docs that can be
 //! improved, submit a PR, or chat with us first on irc.mozilla.org #rust-docs.
 //!
 //! # A Tour of The Rust Standard Library
 //!
 //! The rest of this crate documentation is dedicated to pointing out notable
 //! features of The Rust Standard Library.
 //!
 //! ## Containers and collections
 //!
 //! The [`option`] and [`result`] modules define optional and error-handling
 //! types, [`Option<T>`] and [`Result<T, E>`]. The [`iter`] module defines
 //! Rust's iterator trait, [`Iterator`], which works with the [`for`] loop to
 //! access collections.
 //!
 //! The standard library exposes three common ways to deal with contiguous
 //! regions of memory:
 //!
 //! * [`Vec<T>`] - A heap-allocated *vector* that is resizable at runtime.
 //! * [`[T; n]`][array] - An inline *array* with a fixed size at compile time.
 //! * [`[T]`][slice] - A dynamically sized *slice* into any other kind of contiguous
 //!   storage, whether heap-allocated or not.
 //!
 //! Slices can only be handled through some kind of *pointer*, and as such come
 //! in many flavors such as:
 //!
 //! * `&[T]` - *shared slice*
 //! * `&mut [T]` - *mutable slice*
 //! * [`Box<[T]>`][owned slice] - *owned slice*
 //!
 //! [`str`], a UTF-8 string slice, is a primitive type, and the standard library
 //! defines many methods for it. Rust [`str`]s are typically accessed as
 //! immutable references: `&str`. Use the owned [`String`] for building and
 //! mutating strings.
 //!
 //! For converting to strings use the [`format!`] macro, and for converting from
 //! strings use the [`FromStr`] trait.
 //!
 //! Data may be shared by placing it in a reference-counted box or the [`Rc`]
 //! type, and if further contained in a [`Cell`] or [`RefCell`], may be mutated
 //! as well as shared. Likewise, in a concurrent setting it is common to pair an
 //! atomically-reference-counted box, [`Arc`], with a [`Mutex`] to get the same
 //! effect.
 //!
 //! The [`collections`] module defines maps, sets, linked lists and other
 //! typical collection types, including the common [`HashMap<K, V>`].
 //!
 //! ## Platform abstractions and I/O
 //!
 //! Besides basic data types, the standard library is largely concerned with
 //! abstracting over differences in common platforms, most notably Windows and
 //! Unix derivatives.
 //!
 //! Common types of I/O, including [files], [TCP], [UDP], are defined in the
 //! [`io`], [`fs`], and [`net`] modules.
 //!
 //! The [`thread`] module contains Rust's threading abstractions. [`sync`]
 //! contains further primitive shared memory types, including [`atomic`] and
 //! [`mpsc`], which contains the channel types for message passing.
 //!
 //! [I/O]: io/index.html
 //! [`MIN`]: i32/constant.MIN.html
 //! [TCP]: net/struct.TcpStream.html
 //! [The Rust Prelude]: prelude/index.html
 //! [UDP]: net/struct.UdpSocket.html
 //! [`::std::env::args`]: env/fn.args.html
 //! [`Arc`]: sync/struct.Arc.html
 //! [owned slice]: boxed/index.html
 //! [`Cell`]: cell/struct.Cell.html
 //! [`FromStr`]: str/trait.FromStr.html
 //! [`HashMap<K, V>`]: collections/struct.HashMap.html
 //! [`Iterator`]: iter/trait.Iterator.html
 //! [`Mutex`]: sync/struct.Mutex.html
 //! [`Option<T>`]: option/enum.Option.html
 //! [`Rc`]: rc/index.html
 //! [`RefCell`]: cell/struct.RefCell.html
 //! [`Result<T, E>`]: result/enum.Result.html
 //! [`String`]: string/struct.String.html
 //! [`Vec<T>`]: vec/index.html
 //! [array]: primitive.array.html
 //! [slice]: primitive.slice.html
 //! [`atomic`]: sync/atomic/index.html
 //! [`collections`]: collections/index.html
 //! [`for`]: ../book/first-edition/loops.html#for
 //! [`format!`]: macro.format.html
 //! [`fs`]: fs/index.html
 //! [`io`]: io/index.html
 //! [`iter`]: iter/index.html
 //! [`mpsc`]: sync/mpsc/index.html
 //! [`net`]: net/index.html
 //! [`option`]: option/index.html
 //! [`result`]: result/index.html
 //! [`std::cmp`]: cmp/index.html
 //! [`std::slice`]: slice/index.html
 //! [`str`]: primitive.str.html
 //! [`sync`]: sync/index.html
 //! [`thread`]: thread/index.html
 //! [`use std::env`]: env/index.html
 //! [`use`]: ../book/first-edition/crates-and-modules.html#importing-modules-with-use
 //! [crate root]: ../book/first-edition/crates-and-modules.html#basic-terminology-crates-and-modules
 //! [crates.io]: https://crates.io
 //! [deref-coercions]: ../book/second-edition/ch15-02-deref.html#implicit-deref-coercions-with-functions-and-methods
 //! [files]: fs/struct.File.html
 //! [multithreading]: thread/index.html
 //! [other]: #what-is-in-the-standard-library-documentation
 //! [primitive types]: ../book/first-edition/primitive-types.html
 #![stable(feature = "rust1", since = "1.0.0")]
 #![doc(html_logo_url = "https://www.rust-lang.org/logos/rust-logo-128x128-blk-v2.png",
       html_favicon_url = "https://doc.rust-lang.org/favicon.ico",
       html_root_url = "https://doc.rust-lang.org/nightly/",
       html_playground_url = "https://play.rust-lang.org/",
       issue_tracker_base_url = "https://github.com/rust-lang/rust/issues/",
       test(no_crate_inject, attr(deny(warnings))),
       test(attr(allow(dead_code, deprecated, unused_variables, unused_mut))))]
 // Don't link to std. We are std.
 #![no_std]
 #![deny(missing_docs)]
 #![deny(missing_debug_implementations)]
 // Tell the compiler to link to either panic_abort or panic_unwind
 #![needs_panic_runtime]
 // std may use features in a platform-specific way
 #![allow(unused_features)]
 // std is implemented with unstable features, many of which are internal
 // compiler details that will never be stable
 #![cfg_attr(test, feature(test, update_panic_count))]
 #![feature(alloc)]
 #![feature(alloc_error_handler)]
 #![feature(allocator_api)]
 #![feature(allocator_internals)]
 #![feature(allow_internal_unsafe)]
 #![feature(allow_internal_unstable)]
 #![feature(align_offset)]
 #![feature(arbitrary_self_types)]
 #![feature(array_error_internals)]
 #![feature(asm)]
 #![feature(attr_literals)]
 #![feature(box_syntax)]
 #![feature(cfg_target_has_atomic)]
 #![feature(cfg_target_thread_local)]
 #![feature(cfg_target_vendor)]
 #![feature(char_error_internals)]
 #![feature(compiler_builtins_lib)]
 #![feature(const_fn)]
 #![feature(const_int_ops)]
 #![feature(const_ip)]
 #![feature(core_intrinsics)]
 #![feature(dropck_eyepatch)]
 #![feature(exact_size_is_empty)]
 #![feature(external_doc)]
 #![feature(fixed_size_array)]
 #![feature(fn_traits)]
 #![feature(fnbox)]
 #![feature(futures_api)]
 #![feature(generator_trait)]
 #![feature(hashmap_internals)]
 #![feature(int_error_internals)]
 #![feature(integer_atomics)]
 #![feature(lang_items)]
 #![feature(libc)]
 #![feature(link_args)]
 #![feature(linkage)]
 #![feature(macro_vis_matcher)]
 #![feature(needs_panic_runtime)]
 #![feature(never_type)]
 #![cfg_attr(not(stage0), feature(nll))]
 #![feature(exhaustive_patterns)]
 #![feature(on_unimplemented)]
 #![feature(optin_builtin_traits)]
 #![feature(panic_internals)]
 #![feature(panic_unwind)]
 #![feature(pin)]
 #![feature(prelude_import)]
 #![feature(ptr_internals)]
 #![feature(raw)]
 #![feature(rustc_attrs)]
 #![feature(rustc_const_unstable)]
 #![feature(std_internals)]
 #![feature(stdsimd)]
 #![feature(shrink_to)]
 #![feature(slice_concat_ext)]
 #![feature(slice_internals)]
 #![feature(slice_patterns)]
 #![feature(staged_api)]
 #![feature(stmt_expr_attributes)]
 #![feature(str_internals)]
 #![feature(rustc_private)]
 #![feature(thread_local)]
 #![feature(toowned_clone_into)]
 #![feature(try_from)]
 #![feature(try_reserve)]
 #![feature(unboxed_closures)]
 #![feature(untagged_unions)]
 #![feature(unwind_attributes)]
 #![cfg_attr(stage0, feature(use_extern_macros))]
 #![feature(doc_cfg)]
 #![feature(doc_masked)]
 #![feature(doc_spotlight)]
 #![cfg_attr(windows, feature(used))]
 #![feature(doc_alias)]
 #![feature(doc_keyword)]
 #![feature(panic_info_message)]
 #![feature(panic_implementation)]
 #![feature(non_exhaustive)]
 #![default_lib_allocator]
 // Always use alloc_system during stage0 since we don't know if the alloc_*
 // crate the stage0 compiler will pick by default is enabled (e.g.
 // if the user has disabled jemalloc in `./configure`).
 // `force_alloc_system` is *only* intended as a workaround for local rebuilds
 // with a rustc without jemalloc.
 // FIXME(#44236) shouldn't need MSVC logic
 #[cfg(all(not(target_env = "msvc"),
          any(all(stage0, not(test)), feature = "force_alloc_system")))]
 #[global_allocator]
 static ALLOC: alloc_system::System = alloc_system::System;
 // Explicitly import the prelude. The compiler uses this same unstable attribute
 // to import the prelude implicitly when building crates that depend on std.
 #[prelude_import]
 #[allow(unused)]
 use prelude::v1::*;
 // Access to Bencher, etc.
 #[cfg(test)] extern crate test;
 #[cfg(test)] extern crate rand;
 // Re-export a few macros from core
 #[stable(feature = "rust1", since = "1.0.0")]
 pub use core::{assert_eq, assert_ne, debug_assert, debug_assert_eq, debug_assert_ne};
 #[stable(feature = "rust1", since = "1.0.0")]
 pub use core::{unreachable, unimplemented, write, writeln, try};
 #[allow(unused_imports)] // macros from `alloc` are not used on all platforms
 #[macro_use]
 extern crate alloc as alloc_crate;
 extern crate alloc_system;
 #[doc(masked)]
 extern crate libc;
 // 3DS-specific dependency
 extern crate ctru_sys as libctru;
 // We always need an unwinder currently for backtraces
 #[doc(masked)]
 #[allow(unused_extern_crates)]
 extern crate unwind;
 // During testing, this crate is not actually the "real" std library, but rather
 // it links to the real std library, which was compiled from this same source
 // code. So any lang items std defines are conditionally excluded (or else they
 // would generate duplicate lang item errors), and any globals it defines are
 // _not_ the globals used by "real" std. So this import, defined only during
 // testing gives test-std access to real-std lang items and globals. See #2912
 #[cfg(test)] extern crate std as realstd;
 // The standard macros that are not built-in to the compiler.
 #[macro_use]
 mod macros;
 // The Rust prelude
 pub mod prelude;
 // Public module declarations and re-exports
 #[stable(feature = "rust1", since = "1.0.0")]
 pub use core::any;
 #[stable(feature = "rust1", since = "1.0.0")]
 pub use core::cell;
 #[stable(feature = "rust1", since = "1.0.0")]
 pub use core::clone;
 #[stable(feature = "rust1", since = "1.0.0")]
 pub use core::cmp;
 #[stable(feature = "rust1", since = "1.0.0")]
 pub use core::convert;
 #[stable(feature = "rust1", since = "1.0.0")]
 pub use core::default;
 #[stable(feature = "rust1", since = "1.0.0")]
 pub use core::hash;
 #[stable(feature = "rust1", since = "1.0.0")]
 pub use core::intrinsics;
 #[stable(feature = "rust1", since = "1.0.0")]
 pub use core::iter;
 #[stable(feature = "rust1", since = "1.0.0")]
 pub use core::marker;
 #[stable(feature = "rust1", since = "1.0.0")]
 pub use core::mem;
 #[stable(feature = "rust1", since = "1.0.0")]
 pub use core::ops;
 #[stable(feature = "rust1", since = "1.0.0")]
 pub use core::ptr;
 #[stable(feature = "rust1", since = "1.0.0")]
 pub use core::raw;
 #[stable(feature = "rust1", since = "1.0.0")]
 pub use core::result;
 #[stable(feature = "rust1", since = "1.0.0")]
 pub use core::option;
 #[stable(feature = "rust1", since = "1.0.0")]
 pub use core::isize;
 #[stable(feature = "rust1", since = "1.0.0")]
 pub use core::i8;
 #[stable(feature = "rust1", since = "1.0.0")]
 pub use core::i16;
 #[stable(feature = "rust1", since = "1.0.0")]
 pub use core::i32;
 #[stable(feature = "rust1", since = "1.0.0")]
 pub use core::i64;
 #[stable(feature = "i128", since = "1.26.0")]
 pub use core::i128;
 #[stable(feature = "rust1", since = "1.0.0")]
 pub use core::usize;
 #[stable(feature = "rust1", since = "1.0.0")]
 pub use core::u8;
 #[stable(feature = "rust1", since = "1.0.0")]
 pub use core::u16;
 #[stable(feature = "rust1", since = "1.0.0")]
 pub use core::u32;
 #[stable(feature = "rust1", since = "1.0.0")]
 pub use core::u64;
 #[stable(feature = "rust1", since = "1.0.0")]
 pub use alloc_crate::boxed;
 #[stable(feature = "rust1", since = "1.0.0")]
 pub use alloc_crate::rc;
 #[stable(feature = "rust1", since = "1.0.0")]
 pub use alloc_crate::borrow;
 #[stable(feature = "rust1", since = "1.0.0")]
 pub use alloc_crate::fmt;
 #[stable(feature = "rust1", since = "1.0.0")]
 pub use alloc_crate::format;
 #[stable(feature = "rust1", since = "1.0.0")]
 pub use alloc_crate::slice;
 #[stable(feature = "rust1", since = "1.0.0")]
 pub use alloc_crate::str;
 #[stable(feature = "rust1", since = "1.0.0")]
 pub use alloc_crate::string;
 #[stable(feature = "rust1", since = "1.0.0")]
 pub use alloc_crate::vec;
 #[stable(feature = "rust1", since = "1.0.0")]
 pub use core::char;
 #[stable(feature = "i128", since = "1.26.0")]
 pub use core::u128;
 #[stable(feature = "core_hint", since = "1.27.0")]
 pub use core::hint;
 pub mod f32;
 pub mod f64;
 #[macro_use]
 pub mod thread;
 pub mod ascii;
 pub mod collections;
 pub mod env;
 pub mod error;
 pub mod ffi;
 pub mod fs;
 pub mod io;
 pub mod net;
 pub mod num;
 pub mod os;
 pub mod panic;
 pub mod path;
 pub mod process;
 pub mod sync;
 pub mod time;
 #[unstable(feature = "futures_api",
           reason = "futures in libcore are unstable",
           issue = "50547")]
 pub mod task {
    //! Types and Traits for working with asynchronous tasks.
    #[doc(inline)]
    pub use core::task::*;
    #[doc(inline)]
    pub use alloc_crate::task::*;
 }
 #[unstable(feature = "futures_api",
           reason = "futures in libcore are unstable",
           issue = "50547")]
 pub mod future;
 // Platform-abstraction modules
 #[macro_use]
 mod sys_common;
 mod sys;
 pub mod alloc;
 // Private support modules
 mod panicking;
 mod memchr;
 // The runtime entry point and a few unstable public functions used by the
 // compiler
 pub mod rt;
 // Include a number of private modules that exist solely to provide
 // the rustdoc documentation for primitive types. Using `include!`
 // because rustdoc only looks for these modules at the crate level.
 include!("primitive_docs.rs");
 // Include a number of private modules that exist solely to provide
 // the rustdoc documentation for the existing keywords. Using `include!`
 // because rustdoc only looks for these modules at the crate level.
 include!("keyword_docs.rs");
--- a/ctr-std/src/macros.rs
+++ b/ctr-std/src/macros.rs
@ -1,871 +0,0 @@
 // Copyright 2014 The Rust Project Developers. See the COPYRIGHT
 // file at the top-level directory of this distribution and at
 // http://rust-lang.org/COPYRIGHT.
 //
 // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
 // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 //! Standard library macros
 //!
 //! This modules contains a set of macros which are exported from the standard
 //! library. Each macro is available for use when linking against the standard
 //! library.
 /// The entry point for panic of Rust threads.
 ///
 /// This allows a program to to terminate immediately and provide feedback
 /// to the caller of the program. `panic!` should be used when a program reaches
 /// an unrecoverable problem.
 ///
 /// This macro is the perfect way to assert conditions in example code and in
 /// tests.  `panic!` is closely tied with the `unwrap` method of both [`Option`]
 /// and [`Result`][runwrap] enums.  Both implementations call `panic!` when they are set
 /// to None or Err variants.
 ///
 /// This macro is used to inject panic into a Rust thread, causing the thread to
 /// panic entirely. Each thread's panic can be reaped as the `Box<Any>` type,
 /// and the single-argument form of the `panic!` macro will be the value which
 /// is transmitted.
 ///
 /// [`Result`] enum is often a better solution for recovering from errors than
 /// using the `panic!` macro.  This macro should be used to avoid proceeding using
 /// incorrect values, such as from external sources.  Detailed information about
 /// error handling is found in the [book].
 ///
 /// The multi-argument form of this macro panics with a string and has the
 /// [`format!`] syntax for building a string.
 ///
 /// See also the macro [`compile_error!`], for raising errors during compilation.
 ///
 /// [runwrap]: ../std/result/enum.Result.html#method.unwrap
 /// [`Option`]: ../std/option/enum.Option.html#method.unwrap
 /// [`Result`]: ../std/result/enum.Result.html
 /// [`format!`]: ../std/macro.format.html
 /// [`compile_error!`]: ../std/macro.compile_error.html
 /// [book]: ../book/second-edition/ch09-01-unrecoverable-errors-with-panic.html
 ///
 /// # Current implementation
 ///
 /// If the main thread panics it will terminate all your threads and end your
 /// program with code `101`.
 ///
 /// # Examples
 ///
 /// ```should_panic
 /// # #![allow(unreachable_code)]
 /// panic!();
 /// panic!("this is a terrible mistake!");
 /// panic!(4); // panic with the value of 4 to be collected elsewhere
 /// panic!("this is a {} {message}", "fancy", message = "message");
 /// ```
 #[macro_export]
 #[stable(feature = "rust1", since = "1.0.0")]
 #[allow_internal_unstable]
 macro_rules! panic {
    () => ({
        panic!("explicit panic")
    });
    ($msg:expr) => ({
        $crate::rt::begin_panic($msg, &(file!(), line!(), __rust_unstable_column!()))
    });
    ($msg:expr,) => ({
        panic!($msg)
    });
    ($fmt:expr, $($arg:tt)+) => ({
        $crate::rt::begin_panic_fmt(&format_args!($fmt, $($arg)+),
                                    &(file!(), line!(), __rust_unstable_column!()))
    });
 }
 /// Macro for printing to the standard output.
 ///
 /// Equivalent to the [`println!`] macro except that a newline is not printed at
 /// the end of the message.
 ///
 /// Note that stdout is frequently line-buffered by default so it may be
 /// necessary to use [`io::stdout().flush()`][flush] to ensure the output is emitted
 /// immediately.
 ///
 /// Use `print!` only for the primary output of your program.  Use
 /// [`eprint!`] instead to print error and progress messages.
 ///
 /// [`println!`]: ../std/macro.println.html
 /// [flush]: ../std/io/trait.Write.html#tymethod.flush
 /// [`eprint!`]: ../std/macro.eprint.html
 ///
 /// # Panics
 ///
 /// Panics if writing to `io::stdout()` fails.
 ///
 /// # Examples
 ///
 /// ```
 /// use std::io::{self, Write};
 ///
 /// print!("this ");
 /// print!("will ");
 /// print!("be ");
 /// print!("on ");
 /// print!("the ");
 /// print!("same ");
 /// print!("line ");
 ///
 /// io::stdout().flush().unwrap();
 ///
 /// print!("this string has a newline, why not choose println! instead?\n");
 ///
 /// io::stdout().flush().unwrap();
 /// ```
 #[macro_export]
 #[stable(feature = "rust1", since = "1.0.0")]
 #[allow_internal_unstable]
 macro_rules! print {
    ($($arg:tt)*) => ($crate::io::_print(format_args!($($arg)*)));
 }
 /// Macro for printing to the standard output, with a newline.
 ///
 /// On all platforms, the newline is the LINE FEED character (`\n`/`U+000A`) alone
 /// (no additional CARRIAGE RETURN (`\r`/`U+000D`).
 ///
 /// Use the [`format!`] syntax to write data to the standard output.
 /// See [`std::fmt`] for more information.
 ///
 /// Use `println!` only for the primary output of your program.  Use
 /// [`eprintln!`] instead to print error and progress messages.
 ///
 /// [`format!`]: ../std/macro.format.html
 /// [`std::fmt`]: ../std/fmt/index.html
 /// [`eprintln!`]: ../std/macro.eprint.html
 /// # Panics
 ///
 /// Panics if writing to `io::stdout` fails.
 ///
 /// # Examples
 ///
 /// ```
 /// println!(); // prints just a newline
 /// println!("hello there!");
 /// println!("format {} arguments", "some");
 /// ```
 #[macro_export]
 #[stable(feature = "rust1", since = "1.0.0")]
 #[allow_internal_unstable]
 macro_rules! println {
    () => (print!("\n"));
    ($($arg:tt)*) => ({
        $crate::io::_print(format_args_nl!($($arg)*));
    })
 }
 /// Macro for printing to the standard error.
 ///
 /// Equivalent to the [`print!`] macro, except that output goes to
 /// [`io::stderr`] instead of `io::stdout`.  See [`print!`] for
 /// example usage.
 ///
 /// Use `eprint!` only for error and progress messages.  Use `print!`
 /// instead for the primary output of your program.
 ///
 /// [`io::stderr`]: ../std/io/struct.Stderr.html
 /// [`print!`]: ../std/macro.print.html
 ///
 /// # Panics
 ///
 /// Panics if writing to `io::stderr` fails.
 ///
 /// # Examples
 ///
 /// ```
 /// eprint!("Error: Could not complete task");
 /// ```
 #[macro_export]
 #[stable(feature = "eprint", since = "1.19.0")]
 #[allow_internal_unstable]
 macro_rules! eprint {
    ($($arg:tt)*) => ($crate::io::_eprint(format_args!($($arg)*)));
 }
 /// Macro for printing to the standard error, with a newline.
 ///
 /// Equivalent to the [`println!`] macro, except that output goes to
 /// [`io::stderr`] instead of `io::stdout`.  See [`println!`] for
 /// example usage.
 ///
 /// Use `eprintln!` only for error and progress messages.  Use `println!`
 /// instead for the primary output of your program.
 ///
 /// [`io::stderr`]: ../std/io/struct.Stderr.html
 /// [`println!`]: ../std/macro.println.html
 ///
 /// # Panics
 ///
 /// Panics if writing to `io::stderr` fails.
 ///
 /// # Examples
 ///
 /// ```
 /// eprintln!("Error: Could not complete task");
 /// ```
 #[macro_export]
 #[stable(feature = "eprint", since = "1.19.0")]
 #[allow_internal_unstable]
 macro_rules! eprintln {
    () => (eprint!("\n"));
    ($($arg:tt)*) => ({
        $crate::io::_eprint(format_args_nl!($($arg)*));
    })
 }
 #[macro_export]
 #[unstable(feature = "await_macro", issue = "50547")]
 #[allow_internal_unstable]
 #[allow_internal_unsafe]
 macro_rules! await {
    ($e:expr) => { {
        let mut pinned = $e;
        loop {
            if let $crate::task::Poll::Ready(x) =
                $crate::future::poll_in_task_cx(unsafe {
                    $crate::mem::PinMut::new_unchecked(&mut pinned)
                })
            {
                break x;
            }
            // FIXME(cramertj) prior to stabilizing await, we have to ensure that this
            // can't be used to create a generator on stable via `|| await!()`.
            yield
        }
    } }
 }
 /// A macro to select an event from a number of receivers.
 ///
 /// This macro is used to wait for the first event to occur on a number of
 /// receivers. It places no restrictions on the types of receivers given to
 /// this macro, this can be viewed as a heterogeneous select.
 ///
 /// # Examples
 ///
 /// ```
 /// #![feature(mpsc_select)]
 ///
 /// use std::thread;
 /// use std::sync::mpsc;
 ///
 /// // two placeholder functions for now
 /// fn long_running_thread() {}
 /// fn calculate_the_answer() -> u32 { 42 }
 ///
 /// let (tx1, rx1) = mpsc::channel();
 /// let (tx2, rx2) = mpsc::channel();
 ///
 /// thread::spawn(move|| { long_running_thread(); tx1.send(()).unwrap(); });
 /// thread::spawn(move|| { tx2.send(calculate_the_answer()).unwrap(); });
 ///
 /// select! {
 ///     _ = rx1.recv() => println!("the long running thread finished first"),
 ///     answer = rx2.recv() => {
 ///         println!("the answer was: {}", answer.unwrap());
 ///     }
 /// }
 /// # drop(rx1.recv());
 /// # drop(rx2.recv());
 /// ```
 ///
 /// For more information about select, see the `std::sync::mpsc::Select` structure.
 #[macro_export]
 #[unstable(feature = "mpsc_select", issue = "27800")]
 macro_rules! select {
    (
        $($name:pat = $rx:ident.$meth:ident() => $code:expr),+
    ) => ({
        use $crate::sync::mpsc::Select;
        let sel = Select::new();
        $( let mut $rx = sel.handle(&$rx); )+
        unsafe {
            $( $rx.add(); )+
        }
        let ret = sel.wait();
        $( if ret == $rx.id() { let $name = $rx.$meth(); $code } else )+
        { unreachable!() }
    })
 }
 #[cfg(test)]
 macro_rules! assert_approx_eq {
    ($a:expr, $b:expr) => ({
        let (a, b) = (&$a, &$b);
        assert!((*a - *b).abs() < 1.0e-6,
                "{} is not approximately equal to {}", *a, *b);
    })
 }
 /// Built-in macros to the compiler itself.
 ///
 /// These macros do not have any corresponding definition with a `macro_rules!`
 /// macro, but are documented here. Their implementations can be found hardcoded
 /// into libsyntax itself.
 #[cfg(dox)]
 mod builtin {
    /// Unconditionally causes compilation to fail with the given error message when encountered.
    ///
    /// This macro should be used when a crate uses a conditional compilation strategy to provide
    /// better error messages for erroneous conditions. It's the compiler-level form of [`panic!`],
    /// which emits an error at *runtime*, rather than during compilation.
    ///
    /// # Examples
    ///
    /// Two such examples are macros and `#[cfg]` environments.
    ///
    /// Emit better compiler error if a macro is passed invalid values. Without the final branch,
    /// the compiler would still emit an error, but the error's message would not mention the two
    /// valid values.
    ///
    /// ```compile_fail
    /// macro_rules! give_me_foo_or_bar {
    ///     (foo) => {};
    ///     (bar) => {};
    ///     ($x:ident) => {
    ///         compile_error!("This macro only accepts `foo` or `bar`");
    ///     }
    /// }
    ///
    /// give_me_foo_or_bar!(neither);
    /// // ^ will fail at compile time with message "This macro only accepts `foo` or `bar`"
    /// ```
    ///
    /// Emit compiler error if one of a number of features isn't available.
    ///
    /// ```compile_fail
    /// #[cfg(not(any(feature = "foo", feature = "bar")))]
    /// compile_error!("Either feature \"foo\" or \"bar\" must be enabled for this crate.")
    /// ```
    ///
    /// [`panic!`]: ../std/macro.panic.html
    #[stable(feature = "compile_error_macro", since = "1.20.0")]
    #[rustc_doc_only_macro]
    macro_rules! compile_error {
        ($msg:expr) => ({ /* compiler built-in */ });
        ($msg:expr,) => ({ /* compiler built-in */ });
    }
    /// The core macro for formatted string creation & output.
    ///
    /// This macro functions by taking a formatting string literal containing
    /// `{}` for each additional argument passed.  `format_args!` prepares the
    /// additional parameters to ensure the output can be interpreted as a string
    /// and canonicalizes the arguments into a single type.  Any value that implements
    /// the [`Display`] trait can be passed to `format_args!`, as can any
    /// [`Debug`] implementation be passed to a `{:?}` within the formatting string.
    ///
    /// This macro produces a value of type [`fmt::Arguments`]. This value can be
    /// passed to the macros within [`std::fmt`] for performing useful redirection.
    /// All other formatting macros ([`format!`], [`write!`], [`println!`], etc) are
    /// proxied through this one.  `format_args!`, unlike its derived macros, avoids
    /// heap allocations.
    ///
    /// You can use the [`fmt::Arguments`] value that `format_args!` returns
    /// in `Debug` and `Display` contexts as seen below. The example also shows
    /// that `Debug` and `Display` format to the same thing: the interpolated
    /// format string in `format_args!`.
    ///
    /// ```rust
    /// let debug = format!("{:?}", format_args!("{} foo {:?}", 1, 2));
    /// let display = format!("{}", format_args!("{} foo {:?}", 1, 2));
    /// assert_eq!("1 foo 2", display);
    /// assert_eq!(display, debug);
    /// ```
    ///
    /// For more information, see the documentation in [`std::fmt`].
    ///
    /// [`Display`]: ../std/fmt/trait.Display.html
    /// [`Debug`]: ../std/fmt/trait.Debug.html
    /// [`fmt::Arguments`]: ../std/fmt/struct.Arguments.html
    /// [`std::fmt`]: ../std/fmt/index.html
    /// [`format!`]: ../std/macro.format.html
    /// [`write!`]: ../std/macro.write.html
    /// [`println!`]: ../std/macro.println.html
    ///
    /// # Examples
    ///
    /// ```
    /// use std::fmt;
    ///
    /// let s = fmt::format(format_args!("hello {}", "world"));
    /// assert_eq!(s, format!("hello {}", "world"));
    /// ```
    #[stable(feature = "rust1", since = "1.0.0")]
    #[rustc_doc_only_macro]
    macro_rules! format_args {
        ($fmt:expr) => ({ /* compiler built-in */ });
        ($fmt:expr, $($args:tt)*) => ({ /* compiler built-in */ });
    }
    /// Inspect an environment variable at compile time.
    ///
    /// This macro will expand to the value of the named environment variable at
    /// compile time, yielding an expression of type `&'static str`.
    ///
    /// If the environment variable is not defined, then a compilation error
    /// will be emitted. To not emit a compile error, use the [`option_env!`]
    /// macro instead.
    ///
    /// [`option_env!`]: ../std/macro.option_env.html
    ///
    /// # Examples
    ///
    /// ```
    /// let path: &'static str = env!("PATH");
    /// println!("the $PATH variable at the time of compiling was: {}", path);
    /// ```
    ///
    /// You can customize the error message by passing a string as the second
    /// parameter:
    ///
    /// ```compile_fail
    /// let doc: &'static str = env!("documentation", "what's that?!");
    /// ```
    ///
    /// If the `documentation` environment variable is not defined, you'll get
    /// the following error:
    ///
    /// ```text
    /// error: what's that?!
    /// ```
    #[stable(feature = "rust1", since = "1.0.0")]
    #[rustc_doc_only_macro]
    macro_rules! env {
        ($name:expr) => ({ /* compiler built-in */ });
        ($name:expr,) => ({ /* compiler built-in */ });
    }
    /// Optionally inspect an environment variable at compile time.
    ///
    /// If the named environment variable is present at compile time, this will
    /// expand into an expression of type `Option<&'static str>` whose value is
    /// `Some` of the value of the environment variable. If the environment
    /// variable is not present, then this will expand to `None`.  See
    /// [`Option<T>`][option] for more information on this type.
    ///
    /// A compile time error is never emitted when using this macro regardless
    /// of whether the environment variable is present or not.
    ///
    /// [option]: ../std/option/enum.Option.html
    ///
    /// # Examples
    ///
    /// ```
    /// let key: Option<&'static str> = option_env!("SECRET_KEY");
    /// println!("the secret key might be: {:?}", key);
    /// ```
    #[stable(feature = "rust1", since = "1.0.0")]
    #[rustc_doc_only_macro]
    macro_rules! option_env {
        ($name:expr) => ({ /* compiler built-in */ });
        ($name:expr,) => ({ /* compiler built-in */ });
    }
    /// Concatenate identifiers into one identifier.
    ///
    /// This macro takes any number of comma-separated identifiers, and
    /// concatenates them all into one, yielding an expression which is a new
    /// identifier. Note that hygiene makes it such that this macro cannot
    /// capture local variables. Also, as a general rule, macros are only
    /// allowed in item, statement or expression position. That means while
    /// you may use this macro for referring to existing variables, functions or
    /// modules etc, you cannot define a new one with it.
    ///
    /// # Examples
    ///
    /// ```
    /// #![feature(concat_idents)]
    ///
    /// # fn main() {
    /// fn foobar() -> u32 { 23 }
    ///
    /// let f = concat_idents!(foo, bar);
    /// println!("{}", f());
    ///
    /// // fn concat_idents!(new, fun, name) { } // not usable in this way!
    /// # }
    /// ```
    #[unstable(feature = "concat_idents_macro", issue = "29599")]
    #[rustc_doc_only_macro]
    macro_rules! concat_idents {
        ($($e:ident),+) => ({ /* compiler built-in */ });
        ($($e:ident,)+) => ({ /* compiler built-in */ });
    }
    /// Concatenates literals into a static string slice.
    ///
    /// This macro takes any number of comma-separated literals, yielding an
    /// expression of type `&'static str` which represents all of the literals
    /// concatenated left-to-right.
    ///
    /// Integer and floating point literals are stringified in order to be
    /// concatenated.
    ///
    /// # Examples
    ///
    /// ```
    /// let s = concat!("test", 10, 'b', true);
    /// assert_eq!(s, "test10btrue");
    /// ```
    #[stable(feature = "rust1", since = "1.0.0")]
    #[rustc_doc_only_macro]
    macro_rules! concat {
        ($($e:expr),*) => ({ /* compiler built-in */ });
        ($($e:expr,)*) => ({ /* compiler built-in */ });
    }
    /// A macro which expands to the line number on which it was invoked.
    ///
    /// With [`column!`] and [`file!`], these macros provide debugging information for
    /// developers about the location within the source.
    ///
    /// The expanded expression has type `u32` and is 1-based, so the first line
    /// in each file evaluates to 1, the second to 2, etc. This is consistent
    /// with error messages by common compilers or popular editors.
    /// The returned line is *not necessarily* the line of the `line!` invocation itself,
    /// but rather the first macro invocation leading up to the invocation
    /// of the `line!` macro.
    ///
    /// [`column!`]: macro.column.html
    /// [`file!`]: macro.file.html
    ///
    /// # Examples
    ///
    /// ```
    /// let current_line = line!();
    /// println!("defined on line: {}", current_line);
    /// ```
    #[stable(feature = "rust1", since = "1.0.0")]
    #[rustc_doc_only_macro]
    macro_rules! line { () => ({ /* compiler built-in */ }) }
    /// A macro which expands to the column number on which it was invoked.
    ///
    /// With [`line!`] and [`file!`], these macros provide debugging information for
    /// developers about the location within the source.
    ///
    /// The expanded expression has type `u32` and is 1-based, so the first column
    /// in each line evaluates to 1, the second to 2, etc. This is consistent
    /// with error messages by common compilers or popular editors.
    /// The returned column is *not necessarily* the line of the `column!` invocation itself,
    /// but rather the first macro invocation leading up to the invocation
    /// of the `column!` macro.
    ///
    /// [`line!`]: macro.line.html
    /// [`file!`]: macro.file.html
    ///
    /// # Examples
    ///
    /// ```
    /// let current_col = column!();
    /// println!("defined on column: {}", current_col);
    /// ```
    #[stable(feature = "rust1", since = "1.0.0")]
    #[rustc_doc_only_macro]
    macro_rules! column { () => ({ /* compiler built-in */ }) }
    /// A macro which expands to the file name from which it was invoked.
    ///
    /// With [`line!`] and [`column!`], these macros provide debugging information for
    /// developers about the location within the source.
    ///
    ///
    /// The expanded expression has type `&'static str`, and the returned file
    /// is not the invocation of the `file!` macro itself, but rather the
    /// first macro invocation leading up to the invocation of the `file!`
    /// macro.
    ///
    /// [`line!`]: macro.line.html
    /// [`column!`]: macro.column.html
    ///
    /// # Examples
    ///
    /// ```
    /// let this_file = file!();
    /// println!("defined in file: {}", this_file);
    /// ```
    #[stable(feature = "rust1", since = "1.0.0")]
    #[rustc_doc_only_macro]
    macro_rules! file { () => ({ /* compiler built-in */ }) }
    /// A macro which stringifies its arguments.
    ///
    /// This macro will yield an expression of type `&'static str` which is the
    /// stringification of all the tokens passed to the macro. No restrictions
    /// are placed on the syntax of the macro invocation itself.
    ///
    /// Note that the expanded results of the input tokens may change in the
    /// future. You should be careful if you rely on the output.
    ///
    /// # Examples
    ///
    /// ```
    /// let one_plus_one = stringify!(1 + 1);
    /// assert_eq!(one_plus_one, "1 + 1");
    /// ```
    #[stable(feature = "rust1", since = "1.0.0")]
    #[rustc_doc_only_macro]
    macro_rules! stringify { ($($t:tt)*) => ({ /* compiler built-in */ }) }
    /// Includes a utf8-encoded file as a string.
    ///
    /// The file is located relative to the current file. (similarly to how
    /// modules are found)
    ///
    /// This macro will yield an expression of type `&'static str` which is the
    /// contents of the file.
    ///
    /// # Examples
    ///
    /// Assume there are two files in the same directory with the following
    /// contents:
    ///
    /// File 'spanish.in':
    ///
    /// ```text
    /// adiós
    /// ```
    ///
    /// File 'main.rs':
    ///
    /// ```ignore (cannot-doctest-external-file-dependency)
    /// fn main() {
    ///     let my_str = include_str!("spanish.in");
    ///     assert_eq!(my_str, "adiós\n");
    ///     print!("{}", my_str);
    /// }
    /// ```
    ///
    /// Compiling 'main.rs' and running the resulting binary will print "adiós".
    #[stable(feature = "rust1", since = "1.0.0")]
    #[rustc_doc_only_macro]
    macro_rules! include_str {
        ($file:expr) => ({ /* compiler built-in */ });
        ($file:expr,) => ({ /* compiler built-in */ });
    }
    /// Includes a file as a reference to a byte array.
    ///
    /// The file is located relative to the current file. (similarly to how
    /// modules are found)
    ///
    /// This macro will yield an expression of type `&'static [u8; N]` which is
    /// the contents of the file.
    ///
    /// # Examples
    ///
    /// Assume there are two files in the same directory with the following
    /// contents:
    ///
    /// File 'spanish.in':
    ///
    /// ```text
    /// adiós
    /// ```
    ///
    /// File 'main.rs':
    ///
    /// ```ignore (cannot-doctest-external-file-dependency)
    /// fn main() {
    ///     let bytes = include_bytes!("spanish.in");
    ///     assert_eq!(bytes, b"adi\xc3\xb3s\n");
    ///     print!("{}", String::from_utf8_lossy(bytes));
    /// }
    /// ```
    ///
    /// Compiling 'main.rs' and running the resulting binary will print "adiós".
    #[stable(feature = "rust1", since = "1.0.0")]
    #[rustc_doc_only_macro]
    macro_rules! include_bytes {
        ($file:expr) => ({ /* compiler built-in */ });
        ($file:expr,) => ({ /* compiler built-in */ });
    }
    /// Expands to a string that represents the current module path.
    ///
    /// The current module path can be thought of as the hierarchy of modules
    /// leading back up to the crate root. The first component of the path
    /// returned is the name of the crate currently being compiled.
    ///
    /// # Examples
    ///
    /// ```
    /// mod test {
    ///     pub fn foo() {
    ///         assert!(module_path!().ends_with("test"));
    ///     }
    /// }
    ///
    /// test::foo();
    /// ```
    #[stable(feature = "rust1", since = "1.0.0")]
    #[rustc_doc_only_macro]
    macro_rules! module_path { () => ({ /* compiler built-in */ }) }
    /// Boolean evaluation of configuration flags, at compile-time.
    ///
    /// In addition to the `#[cfg]` attribute, this macro is provided to allow
    /// boolean expression evaluation of configuration flags. This frequently
    /// leads to less duplicated code.
    ///
    /// The syntax given to this macro is the same syntax as [the `cfg`
    /// attribute](../book/first-edition/conditional-compilation.html).
    ///
    /// # Examples
    ///
    /// ```
    /// let my_directory = if cfg!(windows) {
    ///     "windows-specific-directory"
    /// } else {
    ///     "unix-directory"
    /// };
    /// ```
    #[stable(feature = "rust1", since = "1.0.0")]
    #[rustc_doc_only_macro]
    macro_rules! cfg { ($($cfg:tt)*) => ({ /* compiler built-in */ }) }
    /// Parse a file as an expression or an item according to the context.
    ///
    /// The file is located relative to the current file (similarly to how
    /// modules are found).
    ///
    /// Using this macro is often a bad idea, because if the file is
    /// parsed as an expression, it is going to be placed in the
    /// surrounding code unhygienically. This could result in variables
    /// or functions being different from what the file expected if
    /// there are variables or functions that have the same name in
    /// the current file.
    ///
    /// # Examples
    ///
    /// Assume there are two files in the same directory with the following
    /// contents:
    ///
    /// File 'monkeys.in':
    ///
    /// ```ignore (only-for-syntax-highlight)
    /// ['🙈', '🙊', '🙉']
    ///     .iter()
    ///     .cycle()
    ///     .take(6)
    ///     .collect::<String>()
    /// ```
    ///
    /// File 'main.rs':
    ///
    /// ```ignore (cannot-doctest-external-file-dependency)
    /// fn main() {
    ///     let my_string = include!("monkeys.in");
    ///     assert_eq!("🙈🙊🙉🙈🙊🙉", my_string);
    ///     println!("{}", my_string);
    /// }
    /// ```
    ///
    /// Compiling 'main.rs' and running the resulting binary will print
    /// "🙈🙊🙉🙈🙊🙉".
    #[stable(feature = "rust1", since = "1.0.0")]
    #[rustc_doc_only_macro]
    macro_rules! include {
        ($file:expr) => ({ /* compiler built-in */ });
        ($file:expr,) => ({ /* compiler built-in */ });
    }
    /// Ensure that a boolean expression is `true` at runtime.
    ///
    /// This will invoke the [`panic!`] macro if the provided expression cannot be
    /// evaluated to `true` at runtime.
    ///
    /// # Uses
    ///
    /// Assertions are always checked in both debug and release builds, and cannot
    /// be disabled. See [`debug_assert!`] for assertions that are not enabled in
    /// release builds by default.
    ///
    /// Unsafe code relies on `assert!` to enforce run-time invariants that, if
    /// violated could lead to unsafety.
    ///
    /// Other use-cases of `assert!` include [testing] and enforcing run-time
    /// invariants in safe code (whose violation cannot result in unsafety).
    ///
    /// # Custom Messages
    ///
    /// This macro has a second form, where a custom panic message can
    /// be provided with or without arguments for formatting.  See [`std::fmt`]
    /// for syntax for this form.
    ///
    /// [`panic!`]: macro.panic.html
    /// [`debug_assert!`]: macro.debug_assert.html
    /// [testing]: ../book/second-edition/ch11-01-writing-tests.html#checking-results-with-the-assert-macro
    /// [`std::fmt`]: ../std/fmt/index.html
    ///
    /// # Examples
    ///
    /// ```
    /// // the panic message for these assertions is the stringified value of the
    /// // expression given.
    /// assert!(true);
    ///
    /// fn some_computation() -> bool { true } // a very simple function
    ///
    /// assert!(some_computation());
    ///
    /// // assert with a custom message
    /// let x = true;
    /// assert!(x, "x wasn't true!");
    ///
    /// let a = 3; let b = 27;
    /// assert!(a + b == 30, "a = {}, b = {}", a, b);
    /// ```
    #[stable(feature = "rust1", since = "1.0.0")]
    #[rustc_doc_only_macro]
    macro_rules! assert {
        ($cond:expr) => ({ /* compiler built-in */ });
        ($cond:expr,) => ({ /* compiler built-in */ });
        ($cond:expr, $($arg:tt)+) => ({ /* compiler built-in */ });
    }
 }
 /// A macro for defining `#[cfg]` if-else statements.
 ///
 /// This is similar to the `if/elif` C preprocessor macro by allowing definition
 /// of a cascade of `#[cfg]` cases, emitting the implementation which matches
 /// first.
 ///
 /// This allows you to conveniently provide a long list `#[cfg]`'d blocks of code
 /// without having to rewrite each clause multiple times.
 macro_rules! cfg_if {
    ($(
        if #[cfg($($meta:meta),*)] { $($it:item)* }
    ) else * else {
        $($it2:item)*
    }) => {
        __cfg_if_items! {
            () ;
            $( ( ($($meta),*) ($($it)*) ), )*
            ( () ($($it2)*) ),
        }
    }
 }
 macro_rules! __cfg_if_items {
    (($($not:meta,)*) ; ) => {};
    (($($not:meta,)*) ; ( ($($m:meta),*) ($($it:item)*) ), $($rest:tt)*) => {
        __cfg_if_apply! { cfg(all(not(any($($not),*)), $($m,)*)), $($it)* }
        __cfg_if_items! { ($($not,)* $($m,)*) ; $($rest)* }
    }
 }
 macro_rules! __cfg_if_apply {
    ($m:meta, $($it:item)*) => {
        $(#[$m] $it)*
    }
 }
--- a/ctr-std/src/memchr.rs
+++ b/ctr-std/src/memchr.rs
@ -1,143 +0,0 @@
 // Copyright 2015 The Rust Project Developers. See the COPYRIGHT
 // file at the top-level directory of this distribution and at
 // http://rust-lang.org/COPYRIGHT.
 //
 // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
 // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 //
 // Original implementation taken from rust-memchr
 // Copyright 2015 Andrew Gallant, bluss and Nicolas Koch
 /// A safe interface to `memchr`.
 ///
 /// Returns the index corresponding to the first occurrence of `needle` in
 /// `haystack`, or `None` if one is not found.
 ///
 /// memchr reduces to super-optimized machine code at around an order of
 /// magnitude faster than `haystack.iter().position(|&b| b == needle)`.
 /// (See benchmarks.)
 ///
 /// # Examples
 ///
 /// This shows how to find the first position of a byte in a byte string.
 ///
 /// ```ignore (cannot-doctest-private-modules)
 /// use memchr::memchr;
 ///
 /// let haystack = b"the quick brown fox";
 /// assert_eq!(memchr(b'k', haystack), Some(8));
 /// ```
 #[inline]
 pub fn memchr(needle: u8, haystack: &[u8]) -> Option<usize> {
    ::sys::memchr::memchr(needle, haystack)
 }
 /// A safe interface to `memrchr`.
 ///
 /// Returns the index corresponding to the last occurrence of `needle` in
 /// `haystack`, or `None` if one is not found.
 ///
 /// # Examples
 ///
 /// This shows how to find the last position of a byte in a byte string.
 ///
 /// ```ignore (cannot-doctest-private-modules)
 /// use memchr::memrchr;
 ///
 /// let haystack = b"the quick brown fox";
 /// assert_eq!(memrchr(b'o', haystack), Some(17));
 /// ```
 #[inline]
 pub fn memrchr(needle: u8, haystack: &[u8]) -> Option<usize> {
    ::sys::memchr::memrchr(needle, haystack)
 }
 #[cfg(test)]
 mod tests {
    // test the implementations for the current plattform
    use super::{memchr, memrchr};
    #[test]
    fn matches_one() {
        assert_eq!(Some(0), memchr(b'a', b"a"));
    }
    #[test]
    fn matches_begin() {
        assert_eq!(Some(0), memchr(b'a', b"aaaa"));
    }
    #[test]
    fn matches_end() {
        assert_eq!(Some(4), memchr(b'z', b"aaaaz"));
    }
    #[test]
    fn matches_nul() {
        assert_eq!(Some(4), memchr(b'\x00', b"aaaa\x00"));
    }
    #[test]
    fn matches_past_nul() {
        assert_eq!(Some(5), memchr(b'z', b"aaaa\x00z"));
    }
    #[test]
    fn no_match_empty() {
        assert_eq!(None, memchr(b'a', b""));
    }
    #[test]
    fn no_match() {
        assert_eq!(None, memchr(b'a', b"xyz"));
    }
    #[test]
    fn matches_one_reversed() {
        assert_eq!(Some(0), memrchr(b'a', b"a"));
    }
    #[test]
    fn matches_begin_reversed() {
        assert_eq!(Some(3), memrchr(b'a', b"aaaa"));
    }
    #[test]
    fn matches_end_reversed() {
        assert_eq!(Some(0), memrchr(b'z', b"zaaaa"));
    }
    #[test]
    fn matches_nul_reversed() {
        assert_eq!(Some(4), memrchr(b'\x00', b"aaaa\x00"));
    }
    #[test]
    fn matches_past_nul_reversed() {
        assert_eq!(Some(0), memrchr(b'z', b"z\x00aaaa"));
    }
    #[test]
    fn no_match_empty_reversed() {
        assert_eq!(None, memrchr(b'a', b""));
    }
    #[test]
    fn no_match_reversed() {
        assert_eq!(None, memrchr(b'a', b"xyz"));
    }
    #[test]
    fn each_alignment() {
        let mut data = [1u8; 64];
        let needle = 2;
        let pos = 40;
        data[pos] = needle;
        for start in 0..16 {
            assert_eq!(Some(pos - start), memchr(needle, &data[start..]));
        }
    }
 }
--- a/ctr-std/src/net/addr.rs
+++ b/ctr-std/src/net/addr.rs
--- a/ctr-std/src/net/ip.rs
+++ b/ctr-std/src/net/ip.rs
--- a/ctr-std/src/net/mod.rs
+++ b/ctr-std/src/net/mod.rs
@ -1,128 +0,0 @@
 // Copyright 2015 The Rust Project Developers. See the COPYRIGHT
 // file at the top-level directory of this distribution and at
 // http://rust-lang.org/COPYRIGHT.
 //
 // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
 // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 //! Networking primitives for TCP/UDP communication.
 //!
 //! This module provides networking functionality for the Transmission Control and User
 //! Datagram Protocols, as well as types for IP and socket addresses.
 //!
 //! # Organization
 //!
 //! * [`TcpListener`] and [`TcpStream`] provide functionality for communication over TCP
 //! * [`UdpSocket`] provides functionality for communication over UDP
 //! * [`IpAddr`] represents IP addresses of either IPv4 or IPv6; [`Ipv4Addr`] and
 //!   [`Ipv6Addr`] are respectively IPv4 and IPv6 addresses
 //! * [`SocketAddr`] represents socket addresses of either IPv4 or IPv6; [`SocketAddrV4`]
 //!   and [`SocketAddrV6`] are respectively IPv4 and IPv6 socket addresses
 //! * [`ToSocketAddrs`] is a trait that used for generic address resolution when interacting
 //!   with networking objects like [`TcpListener`], [`TcpStream`] or [`UdpSocket`]
 //! * Other types are return or parameter types for various methods in this module
 //!
 //! [`IpAddr`]: ../../std/net/enum.IpAddr.html
 //! [`Ipv4Addr`]: ../../std/net/struct.Ipv4Addr.html
 //! [`Ipv6Addr`]: ../../std/net/struct.Ipv6Addr.html
 //! [`SocketAddr`]: ../../std/net/enum.SocketAddr.html
 //! [`SocketAddrV4`]: ../../std/net/struct.SocketAddrV4.html
 //! [`SocketAddrV6`]: ../../std/net/struct.SocketAddrV6.html
 //! [`TcpListener`]: ../../std/net/struct.TcpListener.html
 //! [`TcpStream`]: ../../std/net/struct.TcpStream.html
 //! [`ToSocketAddrs`]: ../../std/net/trait.ToSocketAddrs.html
 //! [`UdpSocket`]: ../../std/net/struct.UdpSocket.html
 #![stable(feature = "rust1", since = "1.0.0")]
 use io::{self, Error, ErrorKind};
 #[stable(feature = "rust1", since = "1.0.0")]
 pub use self::ip::{IpAddr, Ipv4Addr, Ipv6Addr, Ipv6MulticastScope};
 #[stable(feature = "rust1", since = "1.0.0")]
 pub use self::addr::{SocketAddr, SocketAddrV4, SocketAddrV6, ToSocketAddrs};
 #[stable(feature = "rust1", since = "1.0.0")]
 pub use self::tcp::{TcpStream, TcpListener, Incoming};
 #[stable(feature = "rust1", since = "1.0.0")]
 pub use self::udp::UdpSocket;
 #[stable(feature = "rust1", since = "1.0.0")]
 pub use self::parser::AddrParseError;
 mod ip;
 mod addr;
 mod tcp;
 mod udp;
 mod parser;
 #[cfg(test)]
 mod test;
 /// Possible values which can be passed to the [`shutdown`] method of
 /// [`TcpStream`].
 ///
 /// [`shutdown`]: struct.TcpStream.html#method.shutdown
 /// [`TcpStream`]: struct.TcpStream.html
 #[derive(Copy, Clone, PartialEq, Eq, Debug)]
 #[stable(feature = "rust1", since = "1.0.0")]
 pub enum Shutdown {
    /// The reading portion of the [`TcpStream`] should be shut down.
    ///
    /// All currently blocked and future [reads] will return [`Ok(0)`].
    ///
    /// [`TcpStream`]: ../../std/net/struct.TcpStream.html
    /// [reads]: ../../std/io/trait.Read.html
    /// [`Ok(0)`]: ../../std/result/enum.Result.html#variant.Ok
    #[stable(feature = "rust1", since = "1.0.0")]
    Read,
    /// The writing portion of the [`TcpStream`] should be shut down.
    ///
    /// All currently blocked and future [writes] will return an error.
    ///
    /// [`TcpStream`]: ../../std/net/struct.TcpStream.html
    /// [writes]: ../../std/io/trait.Write.html
    #[stable(feature = "rust1", since = "1.0.0")]
    Write,
    /// Both the reading and the writing portions of the [`TcpStream`] should be shut down.
    ///
    /// See [`Shutdown::Read`] and [`Shutdown::Write`] for more information.
    ///
    /// [`TcpStream`]: ../../std/net/struct.TcpStream.html
    /// [`Shutdown::Read`]: #variant.Read
    /// [`Shutdown::Write`]: #variant.Write
    #[stable(feature = "rust1", since = "1.0.0")]
    Both,
 }
 #[doc(hidden)]
 trait NetInt {
    fn from_be(i: Self) -> Self;
    fn to_be(&self) -> Self;
 }
 macro_rules! doit {
    ($($t:ident)*) => ($(impl NetInt for $t {
        fn from_be(i: Self) -> Self { <$t>::from_be(i) }
        fn to_be(&self) -> Self { <$t>::to_be(*self) }
    })*)
 }
 doit! { i8 i16 i32 i64 isize u8 u16 u32 u64 usize }
 fn hton<I: NetInt>(i: I) -> I { i.to_be() }
 fn ntoh<I: NetInt>(i: I) -> I { I::from_be(i) }
 fn each_addr<A: ToSocketAddrs, F, T>(addr: A, mut f: F) -> io::Result<T>
    where F: FnMut(&SocketAddr) -> io::Result<T>
 {
    let mut last_err = None;
    for addr in addr.to_socket_addrs()? {
        match f(&addr) {
            Ok(l) => return Ok(l),
            Err(e) => last_err = Some(e),
        }
    }
    Err(last_err.unwrap_or_else(|| {
        Error::new(ErrorKind::InvalidInput,
                   "could not resolve to any addresses")
    }))
 }
--- a/ctr-std/src/net/parser.rs
+++ b/ctr-std/src/net/parser.rs
@ -1,414 +0,0 @@
 // Copyright 2015 The Rust Project Developers. See the COPYRIGHT
 // file at the top-level directory of this distribution and at
 // http://rust-lang.org/COPYRIGHT.
 //
 // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
 // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 //! A private parser implementation of IPv4, IPv6, and socket addresses.
 //!
 //! This module is "publicly exported" through the `FromStr` implementations
 //! below.
 use error::Error;
 use fmt;
 use net::{IpAddr, Ipv4Addr, Ipv6Addr, SocketAddr, SocketAddrV4, SocketAddrV6};
 use str::FromStr;
 struct Parser<'a> {
    // parsing as ASCII, so can use byte array
    s: &'a [u8],
    pos: usize,
 }
 impl<'a> Parser<'a> {
    fn new(s: &'a str) -> Parser<'a> {
        Parser {
            s: s.as_bytes(),
            pos: 0,
        }
    }
    fn is_eof(&self) -> bool {
        self.pos == self.s.len()
    }
    // Commit only if parser returns Some
    fn read_atomically<T, F>(&mut self, cb: F) -> Option<T> where
        F: FnOnce(&mut Parser) -> Option<T>,
    {
        let pos = self.pos;
        let r = cb(self);
        if r.is_none() {
            self.pos = pos;
        }
        r
    }
    // Commit only if parser read till EOF
    fn read_till_eof<T, F>(&mut self, cb: F) -> Option<T> where
        F: FnOnce(&mut Parser) -> Option<T>,
    {
        self.read_atomically(move |p| {
            cb(p).filter(|_| p.is_eof())
        })
    }
    // Return result of first successful parser
    fn read_or<T>(&mut self, parsers: &mut [Box<dyn FnMut(&mut Parser) -> Option<T> + 'static>])
               -> Option<T> {
        for pf in parsers {
            if let Some(r) = self.read_atomically(|p: &mut Parser| pf(p)) {
                return Some(r);
            }
        }
        None
    }
    // Apply 3 parsers sequentially
    fn read_seq_3<A, B, C, PA, PB, PC>(&mut self,
                                       pa: PA,
                                       pb: PB,
                                       pc: PC)
                                       -> Option<(A, B, C)> where
        PA: FnOnce(&mut Parser) -> Option<A>,
        PB: FnOnce(&mut Parser) -> Option<B>,
        PC: FnOnce(&mut Parser) -> Option<C>,
    {
        self.read_atomically(move |p| {
            let a = pa(p);
            let b = if a.is_some() { pb(p) } else { None };
            let c = if b.is_some() { pc(p) } else { None };
            match (a, b, c) {
                (Some(a), Some(b), Some(c)) => Some((a, b, c)),
                _ => None
            }
        })
    }
    // Read next char
    fn read_char(&mut self) -> Option<char> {
        if self.is_eof() {
            None
        } else {
            let r = self.s[self.pos] as char;
            self.pos += 1;
            Some(r)
        }
    }
    // Return char and advance iff next char is equal to requested
    fn read_given_char(&mut self, c: char) -> Option<char> {
        self.read_atomically(|p| {
            match p.read_char() {
                Some(next) if next == c => Some(next),
                _ => None,
            }
        })
    }
    // Read digit
    fn read_digit(&mut self, radix: u8) -> Option<u8> {
        fn parse_digit(c: char, radix: u8) -> Option<u8> {
            let c = c as u8;
            // assuming radix is either 10 or 16
            if c >= b'0' && c <= b'9' {
                Some(c - b'0')
            } else if radix > 10 && c >= b'a' && c < b'a' + (radix - 10) {
                Some(c - b'a' + 10)
            } else if radix > 10 && c >= b'A' && c < b'A' + (radix - 10) {
                Some(c - b'A' + 10)
            } else {
                None
            }
        }
        self.read_atomically(|p| {
            p.read_char().and_then(|c| parse_digit(c, radix))
        })
    }
    fn read_number_impl(&mut self, radix: u8, max_digits: u32, upto: u32) -> Option<u32> {
        let mut r = 0;
        let mut digit_count = 0;
        loop {
            match self.read_digit(radix) {
                Some(d) => {
                    r = r * (radix as u32) + (d as u32);
                    digit_count += 1;
                    if digit_count > max_digits || r >= upto {
                        return None
                    }
                }
                None => {
                    if digit_count == 0 {
                        return None
                    } else {
                        return Some(r)
                    }
                }
            };
        }
    }
    // Read number, failing if max_digits of number value exceeded
    fn read_number(&mut self, radix: u8, max_digits: u32, upto: u32) -> Option<u32> {
        self.read_atomically(|p| p.read_number_impl(radix, max_digits, upto))
    }
    fn read_ipv4_addr_impl(&mut self) -> Option<Ipv4Addr> {
        let mut bs = [0; 4];
        let mut i = 0;
        while i < 4 {
            if i != 0 && self.read_given_char('.').is_none() {
                return None;
            }
            bs[i] = self.read_number(10, 3, 0x100).map(|n| n as u8)?;
            i += 1;
        }
        Some(Ipv4Addr::new(bs[0], bs[1], bs[2], bs[3]))
    }
    // Read IPv4 address
    fn read_ipv4_addr(&mut self) -> Option<Ipv4Addr> {
        self.read_atomically(|p| p.read_ipv4_addr_impl())
    }
    fn read_ipv6_addr_impl(&mut self) -> Option<Ipv6Addr> {
        fn ipv6_addr_from_head_tail(head: &[u16], tail: &[u16]) -> Ipv6Addr {
            assert!(head.len() + tail.len() <= 8);
            let mut gs = [0; 8];
            gs[..head.len()].copy_from_slice(head);
            gs[(8 - tail.len()) .. 8].copy_from_slice(tail);
            Ipv6Addr::new(gs[0], gs[1], gs[2], gs[3], gs[4], gs[5], gs[6], gs[7])
        }
        fn read_groups(p: &mut Parser, groups: &mut [u16; 8], limit: usize)
                       -> (usize, bool) {
            let mut i = 0;
            while i < limit {
                if i < limit - 1 {
                    let ipv4 = p.read_atomically(|p| {
                        if i == 0 || p.read_given_char(':').is_some() {
                            p.read_ipv4_addr()
                        } else {
                            None
                        }
                    });
                    if let Some(v4_addr) = ipv4 {
                        let octets = v4_addr.octets();
                        groups[i + 0] = ((octets[0] as u16) << 8) | (octets[1] as u16);
                        groups[i + 1] = ((octets[2] as u16) << 8) | (octets[3] as u16);
                        return (i + 2, true);
                    }
                }
                let group = p.read_atomically(|p| {
                    if i == 0 || p.read_given_char(':').is_some() {
                        p.read_number(16, 4, 0x10000).map(|n| n as u16)
                    } else {
                        None
                    }
                });
                match group {
                    Some(g) => groups[i] = g,
                    None => return (i, false)
                }
                i += 1;
            }
            (i, false)
        }
        let mut head = [0; 8];
        let (head_size, head_ipv4) = read_groups(self, &mut head, 8);
        if head_size == 8 {
            return Some(Ipv6Addr::new(
                head[0], head[1], head[2], head[3],
                head[4], head[5], head[6], head[7]))
        }
        // IPv4 part is not allowed before `::`
        if head_ipv4 {
            return None
        }
        // read `::` if previous code parsed less than 8 groups
        if !self.read_given_char(':').is_some() || !self.read_given_char(':').is_some() {
            return None;
        }
        let mut tail = [0; 8];
        // `::` indicates one or more groups of 16 bits of zeros
        let limit = 8 - (head_size + 1);
        let (tail_size, _) = read_groups(self, &mut tail, limit);
        Some(ipv6_addr_from_head_tail(&head[..head_size], &tail[..tail_size]))
    }
    fn read_ipv6_addr(&mut self) -> Option<Ipv6Addr> {
        self.read_atomically(|p| p.read_ipv6_addr_impl())
    }
    fn read_ip_addr(&mut self) -> Option<IpAddr> {
        let ipv4_addr = |p: &mut Parser| p.read_ipv4_addr().map(IpAddr::V4);
        let ipv6_addr = |p: &mut Parser| p.read_ipv6_addr().map(IpAddr::V6);
        self.read_or(&mut [Box::new(ipv4_addr), Box::new(ipv6_addr)])
    }
    fn read_socket_addr_v4(&mut self) -> Option<SocketAddrV4> {
        let ip_addr = |p: &mut Parser| p.read_ipv4_addr();
        let colon = |p: &mut Parser| p.read_given_char(':');
        let port = |p: &mut Parser| {
            p.read_number(10, 5, 0x10000).map(|n| n as u16)
        };
        self.read_seq_3(ip_addr, colon, port).map(|t| {
            let (ip, _, port): (Ipv4Addr, char, u16) = t;
            SocketAddrV4::new(ip, port)
        })
    }
    fn read_socket_addr_v6(&mut self) -> Option<SocketAddrV6> {
        let ip_addr = |p: &mut Parser| {
            let open_br = |p: &mut Parser| p.read_given_char('[');
            let ip_addr = |p: &mut Parser| p.read_ipv6_addr();
            let clos_br = |p: &mut Parser| p.read_given_char(']');
            p.read_seq_3(open_br, ip_addr, clos_br).map(|t| t.1)
        };
        let colon = |p: &mut Parser| p.read_given_char(':');
        let port = |p: &mut Parser| {
            p.read_number(10, 5, 0x10000).map(|n| n as u16)
        };
        self.read_seq_3(ip_addr, colon, port).map(|t| {
            let (ip, _, port): (Ipv6Addr, char, u16) = t;
            SocketAddrV6::new(ip, port, 0, 0)
        })
    }
    fn read_socket_addr(&mut self) -> Option<SocketAddr> {
        let v4 = |p: &mut Parser| p.read_socket_addr_v4().map(SocketAddr::V4);
        let v6 = |p: &mut Parser| p.read_socket_addr_v6().map(SocketAddr::V6);
        self.read_or(&mut [Box::new(v4), Box::new(v6)])
    }
 }
 #[stable(feature = "ip_addr", since = "1.7.0")]
 impl FromStr for IpAddr {
    type Err = AddrParseError;
    fn from_str(s: &str) -> Result<IpAddr, AddrParseError> {
        match Parser::new(s).read_till_eof(|p| p.read_ip_addr()) {
            Some(s) => Ok(s),
            None => Err(AddrParseError(()))
        }
    }
 }
 #[stable(feature = "rust1", since = "1.0.0")]
 impl FromStr for Ipv4Addr {
    type Err = AddrParseError;
    fn from_str(s: &str) -> Result<Ipv4Addr, AddrParseError> {
        match Parser::new(s).read_till_eof(|p| p.read_ipv4_addr()) {
            Some(s) => Ok(s),
            None => Err(AddrParseError(()))
        }
    }
 }
 #[stable(feature = "rust1", since = "1.0.0")]
 impl FromStr for Ipv6Addr {
    type Err = AddrParseError;
    fn from_str(s: &str) -> Result<Ipv6Addr, AddrParseError> {
        match Parser::new(s).read_till_eof(|p| p.read_ipv6_addr()) {
            Some(s) => Ok(s),
            None => Err(AddrParseError(()))
        }
    }
 }
 #[stable(feature = "socket_addr_from_str", since = "1.5.0")]
 impl FromStr for SocketAddrV4 {
    type Err = AddrParseError;
    fn from_str(s: &str) -> Result<SocketAddrV4, AddrParseError> {
        match Parser::new(s).read_till_eof(|p| p.read_socket_addr_v4()) {
            Some(s) => Ok(s),
            None => Err(AddrParseError(())),
        }
    }
 }
 #[stable(feature = "socket_addr_from_str", since = "1.5.0")]
 impl FromStr for SocketAddrV6 {
    type Err = AddrParseError;
    fn from_str(s: &str) -> Result<SocketAddrV6, AddrParseError> {
        match Parser::new(s).read_till_eof(|p| p.read_socket_addr_v6()) {
            Some(s) => Ok(s),
            None => Err(AddrParseError(())),
        }
    }
 }
 #[stable(feature = "rust1", since = "1.0.0")]
 impl FromStr for SocketAddr {
    type Err = AddrParseError;
    fn from_str(s: &str) -> Result<SocketAddr, AddrParseError> {
        match Parser::new(s).read_till_eof(|p| p.read_socket_addr()) {
            Some(s) => Ok(s),
            None => Err(AddrParseError(())),
        }
    }
 }
 /// An error which can be returned when parsing an IP address or a socket address.
 ///
 /// This error is used as the error type for the [`FromStr`] implementation for
 /// [`IpAddr`], [`Ipv4Addr`], [`Ipv6Addr`], [`SocketAddr`], [`SocketAddrV4`], and
 /// [`SocketAddrV6`].
 ///
 /// # Potential causes
 ///
 /// `AddrParseError` may be thrown because the provided string does not parse as the given type,
 /// often because it includes information only handled by a different address type.
 ///
 /// ```should_panic
 /// use std::net::IpAddr;
 /// let _foo: IpAddr = "127.0.0.1:8080".parse().expect("Cannot handle the socket port");
 /// ```
 ///
 /// [`IpAddr`] doesn't handle the port. Use [`SocketAddr`] instead.
 ///
 /// ```
 /// use std::net::SocketAddr;
 ///
 /// // No problem, the `panic!` message has disappeared.
 /// let _foo: SocketAddr = "127.0.0.1:8080".parse().expect("unreachable panic");
 /// ```
 ///
 /// [`FromStr`]: ../../std/str/trait.FromStr.html
 /// [`IpAddr`]: ../../std/net/enum.IpAddr.html
 /// [`Ipv4Addr`]: ../../std/net/struct.Ipv4Addr.html
 /// [`Ipv6Addr`]: ../../std/net/struct.Ipv6Addr.html
 /// [`SocketAddr`]: ../../std/net/enum.SocketAddr.html
 /// [`SocketAddrV4`]: ../../std/net/struct.SocketAddrV4.html
 /// [`SocketAddrV6`]: ../../std/net/struct.SocketAddrV6.html
 #[stable(feature = "rust1", since = "1.0.0")]
 #[derive(Debug, Clone, PartialEq, Eq)]
 pub struct AddrParseError(());
 #[stable(feature = "addr_parse_error_error", since = "1.4.0")]
 impl fmt::Display for AddrParseError {
    fn fmt(&self, fmt: &mut fmt::Formatter) -> fmt::Result {
        fmt.write_str(self.description())
    }
 }
 #[stable(feature = "addr_parse_error_error", since = "1.4.0")]
 impl Error for AddrParseError {
    fn description(&self) -> &str {
        "invalid IP address syntax"
    }
 }
--- a/ctr-std/src/net/tcp.rs
+++ b/ctr-std/src/net/tcp.rs
--- a/ctr-std/src/net/test.rs
+++ b/ctr-std/src/net/test.rs
@ -1,57 +0,0 @@
 // Copyright 2015 The Rust Project Developers. See the COPYRIGHT
 // file at the top-level directory of this distribution and at
 // http://rust-lang.org/COPYRIGHT.
 //
 // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
 // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 #![allow(warnings)] // not used on emscripten
 use env;
 use net::{SocketAddr, SocketAddrV4, SocketAddrV6, Ipv4Addr, Ipv6Addr, ToSocketAddrs};
 use sync::atomic::{AtomicUsize, Ordering};
 static PORT: AtomicUsize = AtomicUsize::new(0);
 pub fn next_test_ip4() -> SocketAddr {
    let port = PORT.fetch_add(1, Ordering::SeqCst) as u16 + base_port();
    SocketAddr::V4(SocketAddrV4::new(Ipv4Addr::new(127, 0, 0, 1), port))
 }
 pub fn next_test_ip6() -> SocketAddr {
    let port = PORT.fetch_add(1, Ordering::SeqCst) as u16 + base_port();
    SocketAddr::V6(SocketAddrV6::new(Ipv6Addr::new(0, 0, 0, 0, 0, 0, 0, 1),
                                     port, 0, 0))
 }
 pub fn sa4(a: Ipv4Addr, p: u16) -> SocketAddr {
    SocketAddr::V4(SocketAddrV4::new(a, p))
 }
 pub fn sa6(a: Ipv6Addr, p: u16) -> SocketAddr {
    SocketAddr::V6(SocketAddrV6::new(a, p, 0, 0))
 }
 pub fn tsa<A: ToSocketAddrs>(a: A) -> Result<Vec<SocketAddr>, String> {
    match a.to_socket_addrs() {
        Ok(a) => Ok(a.collect()),
        Err(e) => Err(e.to_string()),
    }
 }
 // The bots run multiple builds at the same time, and these builds
 // all want to use ports. This function figures out which workspace
 // it is running in and assigns a port range based on it.
 fn base_port() -> u16 {
    let cwd = env::current_dir().unwrap();
    let dirs = ["32-opt", "32-nopt",
                "musl-64-opt", "cross-opt",
                "64-opt", "64-nopt", "64-opt-vg", "64-debug-opt",
                "all-opt", "snap3", "dist"];
    dirs.iter().enumerate().find(|&(_, dir)| {
        cwd.to_str().unwrap().contains(dir)
    }).map(|p| p.0).unwrap_or(0) as u16 * 1000 + 19600
 }
--- a/ctr-std/src/net/udp.rs
+++ b/ctr-std/src/net/udp.rs
--- a/ctr-std/src/num.rs
+++ b/ctr-std/src/num.rs
@ -1,296 +0,0 @@
 // Copyright 2012-2014 The Rust Project Developers. See the COPYRIGHT
 // file at the top-level directory of this distribution and at
 // http://rust-lang.org/COPYRIGHT.
 //
 // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
 // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 //! Additional functionality for numerics.
 //!
 //! This module provides some extra types that are useful when doing numerical
 //! work. See the individual documentation for each piece for more information.
 #![stable(feature = "rust1", since = "1.0.0")]
 #![allow(missing_docs)]
 #[stable(feature = "rust1", since = "1.0.0")]
 pub use core::num::{FpCategory, ParseIntError, ParseFloatError, TryFromIntError};
 #[stable(feature = "rust1", since = "1.0.0")]
 pub use core::num::Wrapping;
 #[stable(feature = "nonzero", since = "1.28.0")]
 pub use core::num::{NonZeroU8, NonZeroU16, NonZeroU32, NonZeroU64, NonZeroU128, NonZeroUsize};
 #[cfg(test)] use fmt;
 #[cfg(test)] use ops::{Add, Sub, Mul, Div, Rem};
 /// Helper function for testing numeric operations
 #[cfg(test)]
 pub fn test_num<T>(ten: T, two: T) where
    T: PartialEq
     + Add<Output=T> + Sub<Output=T>
     + Mul<Output=T> + Div<Output=T>
     + Rem<Output=T> + fmt::Debug
     + Copy
 {
    assert_eq!(ten.add(two),  ten + two);
    assert_eq!(ten.sub(two),  ten - two);
    assert_eq!(ten.mul(two),  ten * two);
    assert_eq!(ten.div(two),  ten / two);
    assert_eq!(ten.rem(two),  ten % two);
 }
 #[cfg(test)]
 mod tests {
    use u8;
    use u16;
    use u32;
    use u64;
    use usize;
    use ops::Mul;
    #[test]
    fn test_saturating_add_uint() {
        use usize::MAX;
        assert_eq!(3_usize.saturating_add(5_usize), 8_usize);
        assert_eq!(3_usize.saturating_add(MAX-1), MAX);
        assert_eq!(MAX.saturating_add(MAX), MAX);
        assert_eq!((MAX-2).saturating_add(1), MAX-1);
    }
    #[test]
    fn test_saturating_sub_uint() {
        use usize::MAX;
        assert_eq!(5_usize.saturating_sub(3_usize), 2_usize);
        assert_eq!(3_usize.saturating_sub(5_usize), 0_usize);
        assert_eq!(0_usize.saturating_sub(1_usize), 0_usize);
        assert_eq!((MAX-1).saturating_sub(MAX), 0);
    }
    #[test]
    fn test_saturating_add_int() {
        use isize::{MIN,MAX};
        assert_eq!(3i32.saturating_add(5), 8);
        assert_eq!(3isize.saturating_add(MAX-1), MAX);
        assert_eq!(MAX.saturating_add(MAX), MAX);
        assert_eq!((MAX-2).saturating_add(1), MAX-1);
        assert_eq!(3i32.saturating_add(-5), -2);
        assert_eq!(MIN.saturating_add(-1), MIN);
        assert_eq!((-2isize).saturating_add(-MAX), MIN);
    }
    #[test]
    fn test_saturating_sub_int() {
        use isize::{MIN,MAX};
        assert_eq!(3i32.saturating_sub(5), -2);
        assert_eq!(MIN.saturating_sub(1), MIN);
        assert_eq!((-2isize).saturating_sub(MAX), MIN);
        assert_eq!(3i32.saturating_sub(-5), 8);
        assert_eq!(3isize.saturating_sub(-(MAX-1)), MAX);
        assert_eq!(MAX.saturating_sub(-MAX), MAX);
        assert_eq!((MAX-2).saturating_sub(-1), MAX-1);
    }
    #[test]
    fn test_checked_add() {
        let five_less = usize::MAX - 5;
        assert_eq!(five_less.checked_add(0), Some(usize::MAX - 5));
        assert_eq!(five_less.checked_add(1), Some(usize::MAX - 4));
        assert_eq!(five_less.checked_add(2), Some(usize::MAX - 3));
        assert_eq!(five_less.checked_add(3), Some(usize::MAX - 2));
        assert_eq!(five_less.checked_add(4), Some(usize::MAX - 1));
        assert_eq!(five_less.checked_add(5), Some(usize::MAX));
        assert_eq!(five_less.checked_add(6), None);
        assert_eq!(five_less.checked_add(7), None);
    }
    #[test]
    fn test_checked_sub() {
        assert_eq!(5_usize.checked_sub(0), Some(5));
        assert_eq!(5_usize.checked_sub(1), Some(4));
        assert_eq!(5_usize.checked_sub(2), Some(3));
        assert_eq!(5_usize.checked_sub(3), Some(2));
        assert_eq!(5_usize.checked_sub(4), Some(1));
        assert_eq!(5_usize.checked_sub(5), Some(0));
        assert_eq!(5_usize.checked_sub(6), None);
        assert_eq!(5_usize.checked_sub(7), None);
    }
    #[test]
    fn test_checked_mul() {
        let third = usize::MAX / 3;
        assert_eq!(third.checked_mul(0), Some(0));
        assert_eq!(third.checked_mul(1), Some(third));
        assert_eq!(third.checked_mul(2), Some(third * 2));
        assert_eq!(third.checked_mul(3), Some(third * 3));
        assert_eq!(third.checked_mul(4), None);
    }
    macro_rules! test_is_power_of_two {
        ($test_name:ident, $T:ident) => (
            fn $test_name() {
                #![test]
                assert_eq!((0 as $T).is_power_of_two(), false);
                assert_eq!((1 as $T).is_power_of_two(), true);
                assert_eq!((2 as $T).is_power_of_two(), true);
                assert_eq!((3 as $T).is_power_of_two(), false);
                assert_eq!((4 as $T).is_power_of_two(), true);
                assert_eq!((5 as $T).is_power_of_two(), false);
                assert_eq!(($T::MAX / 2 + 1).is_power_of_two(), true);
            }
        )
    }
    test_is_power_of_two!{ test_is_power_of_two_u8, u8 }
    test_is_power_of_two!{ test_is_power_of_two_u16, u16 }
    test_is_power_of_two!{ test_is_power_of_two_u32, u32 }
    test_is_power_of_two!{ test_is_power_of_two_u64, u64 }
    test_is_power_of_two!{ test_is_power_of_two_uint, usize }
    macro_rules! test_next_power_of_two {
        ($test_name:ident, $T:ident) => (
            fn $test_name() {
                #![test]
                assert_eq!((0 as $T).next_power_of_two(), 1);
                let mut next_power = 1;
                for i in 1 as $T..40 {
                     assert_eq!(i.next_power_of_two(), next_power);
                     if i == next_power { next_power *= 2 }
                }
            }
        )
    }
    test_next_power_of_two! { test_next_power_of_two_u8, u8 }
    test_next_power_of_two! { test_next_power_of_two_u16, u16 }
    test_next_power_of_two! { test_next_power_of_two_u32, u32 }
    test_next_power_of_two! { test_next_power_of_two_u64, u64 }
    test_next_power_of_two! { test_next_power_of_two_uint, usize }
    macro_rules! test_checked_next_power_of_two {
        ($test_name:ident, $T:ident) => (
            fn $test_name() {
                #![test]
                assert_eq!((0 as $T).checked_next_power_of_two(), Some(1));
                let smax = $T::MAX >> 1;
                assert_eq!(smax.checked_next_power_of_two(), Some(smax+1));
                assert_eq!((smax + 1).checked_next_power_of_two(), Some(smax + 1));
                assert_eq!((smax + 2).checked_next_power_of_two(), None);
                assert_eq!(($T::MAX - 1).checked_next_power_of_two(), None);
                assert_eq!($T::MAX.checked_next_power_of_two(), None);
                let mut next_power = 1;
                for i in 1 as $T..40 {
                     assert_eq!(i.checked_next_power_of_two(), Some(next_power));
                     if i == next_power { next_power *= 2 }
                }
            }
        )
    }
    test_checked_next_power_of_two! { test_checked_next_power_of_two_u8, u8 }
    test_checked_next_power_of_two! { test_checked_next_power_of_two_u16, u16 }
    test_checked_next_power_of_two! { test_checked_next_power_of_two_u32, u32 }
    test_checked_next_power_of_two! { test_checked_next_power_of_two_u64, u64 }
    test_checked_next_power_of_two! { test_checked_next_power_of_two_uint, usize }
    #[test]
    fn test_pow() {
        fn naive_pow<T: Mul<Output=T> + Copy>(one: T, base: T, exp: usize) -> T {
            (0..exp).fold(one, |acc, _| acc * base)
        }
        macro_rules! assert_pow {
            (($num:expr, $exp:expr) => $expected:expr) => {{
                let result = $num.pow($exp);
                assert_eq!(result, $expected);
                assert_eq!(result, naive_pow(1, $num, $exp));
            }}
        }
        assert_pow!((3u32,     0 ) => 1);
        assert_pow!((5u32,     1 ) => 5);
        assert_pow!((-4i32,    2 ) => 16);
        assert_pow!((8u32,     3 ) => 512);
        assert_pow!((2u64,     50) => 1125899906842624);
    }
    #[test]
    fn test_uint_to_str_overflow() {
        let mut u8_val: u8 = 255;
        assert_eq!(u8_val.to_string(), "255");
        u8_val = u8_val.wrapping_add(1);
        assert_eq!(u8_val.to_string(), "0");
        let mut u16_val: u16 = 65_535;
        assert_eq!(u16_val.to_string(), "65535");
        u16_val = u16_val.wrapping_add(1);
        assert_eq!(u16_val.to_string(), "0");
        let mut u32_val: u32 = 4_294_967_295;
        assert_eq!(u32_val.to_string(), "4294967295");
        u32_val = u32_val.wrapping_add(1);
        assert_eq!(u32_val.to_string(), "0");
        let mut u64_val: u64 = 18_446_744_073_709_551_615;
        assert_eq!(u64_val.to_string(), "18446744073709551615");
        u64_val = u64_val.wrapping_add(1);
        assert_eq!(u64_val.to_string(), "0");
    }
    fn from_str<T: ::str::FromStr>(t: &str) -> Option<T> {
        ::str::FromStr::from_str(t).ok()
    }
    #[test]
    fn test_uint_from_str_overflow() {
        let mut u8_val: u8 = 255;
        assert_eq!(from_str::<u8>("255"), Some(u8_val));
        assert_eq!(from_str::<u8>("256"), None);
        u8_val = u8_val.wrapping_add(1);
        assert_eq!(from_str::<u8>("0"), Some(u8_val));
        assert_eq!(from_str::<u8>("-1"), None);
        let mut u16_val: u16 = 65_535;
        assert_eq!(from_str::<u16>("65535"), Some(u16_val));
        assert_eq!(from_str::<u16>("65536"), None);
        u16_val = u16_val.wrapping_add(1);
        assert_eq!(from_str::<u16>("0"), Some(u16_val));
        assert_eq!(from_str::<u16>("-1"), None);
        let mut u32_val: u32 = 4_294_967_295;
        assert_eq!(from_str::<u32>("4294967295"), Some(u32_val));
        assert_eq!(from_str::<u32>("4294967296"), None);
        u32_val = u32_val.wrapping_add(1);
        assert_eq!(from_str::<u32>("0"), Some(u32_val));
        assert_eq!(from_str::<u32>("-1"), None);
        let mut u64_val: u64 = 18_446_744_073_709_551_615;
        assert_eq!(from_str::<u64>("18446744073709551615"), Some(u64_val));
        assert_eq!(from_str::<u64>("18446744073709551616"), None);
        u64_val = u64_val.wrapping_add(1);
        assert_eq!(from_str::<u64>("0"), Some(u64_val));
        assert_eq!(from_str::<u64>("-1"), None);
    }
 }
 #[cfg(test)]
 mod bench {
    extern crate test;
    use self::test::Bencher;
    #[bench]
    fn bench_pow_function(b: &mut Bencher) {
        let v = (0..1024).collect::<Vec<u32>>();
        b.iter(|| {v.iter().fold(0u32, |old, new| old.pow(*new as u32));});
    }
 }
--- a/ctr-std/src/os/android/fs.rs
+++ b/ctr-std/src/os/android/fs.rs
@ -1,131 +0,0 @@
 // Copyright 2016 The Rust Project Developers. See the COPYRIGHT
 // file at the top-level directory of this distribution and at
 // http://rust-lang.org/COPYRIGHT.
 //
 // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
 // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 #![stable(feature = "metadata_ext", since = "1.1.0")]
 use libc;
 use fs::Metadata;
 use sys_common::AsInner;
 #[allow(deprecated)]
 use os::android::raw;
 /// OS-specific extensions to [`fs::Metadata`].
 ///
 /// [`fs::Metadata`]: ../../../../std/fs/struct.Metadata.html
 #[stable(feature = "metadata_ext", since = "1.1.0")]
 pub trait MetadataExt {
    /// Gain a reference to the underlying `stat` structure which contains
    /// the raw information returned by the OS.
    ///
    /// The contents of the returned `stat` are **not** consistent across
    /// Unix platforms. The `os::unix::fs::MetadataExt` trait contains the
    /// cross-Unix abstractions contained within the raw stat.
    #[stable(feature = "metadata_ext", since = "1.1.0")]
    #[rustc_deprecated(since = "1.8.0",
                       reason = "deprecated in favor of the accessor \
                                 methods of this trait")]
    #[allow(deprecated)]
    fn as_raw_stat(&self) -> &raw::stat;
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_dev(&self) -> u64;
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_ino(&self) -> u64;
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_mode(&self) -> u32;
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_nlink(&self) -> u64;
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_uid(&self) -> u32;
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_gid(&self) -> u32;
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_rdev(&self) -> u64;
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_size(&self) -> u64;
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_atime(&self) -> i64;
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_atime_nsec(&self) -> i64;
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_mtime(&self) -> i64;
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_mtime_nsec(&self) -> i64;
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_ctime(&self) -> i64;
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_ctime_nsec(&self) -> i64;
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_blksize(&self) -> u64;
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_blocks(&self) -> u64;
 }
 #[stable(feature = "metadata_ext", since = "1.1.0")]
 impl MetadataExt for Metadata {
    #[allow(deprecated)]
    fn as_raw_stat(&self) -> &raw::stat {
        unsafe {
            &*(self.as_inner().as_inner() as *const libc::stat
                                          as *const raw::stat)
        }
    }
    fn st_dev(&self) -> u64 {
        self.as_inner().as_inner().st_dev as u64
    }
    fn st_ino(&self) -> u64 {
        self.as_inner().as_inner().st_ino as u64
    }
    fn st_mode(&self) -> u32 {
        self.as_inner().as_inner().st_mode as u32
    }
    fn st_nlink(&self) -> u64 {
        self.as_inner().as_inner().st_nlink as u64
    }
    fn st_uid(&self) -> u32 {
        self.as_inner().as_inner().st_uid as u32
    }
    fn st_gid(&self) -> u32 {
        self.as_inner().as_inner().st_gid as u32
    }
    fn st_rdev(&self) -> u64 {
        self.as_inner().as_inner().st_rdev as u64
    }
    fn st_size(&self) -> u64 {
        self.as_inner().as_inner().st_size as u64
    }
    fn st_atime(&self) -> i64 {
        self.as_inner().as_inner().st_atime as i64
    }
    fn st_atime_nsec(&self) -> i64 {
        self.as_inner().as_inner().st_atime_nsec as i64
    }
    fn st_mtime(&self) -> i64 {
        self.as_inner().as_inner().st_mtime as i64
    }
    fn st_mtime_nsec(&self) -> i64 {
        self.as_inner().as_inner().st_mtime_nsec as i64
    }
    fn st_ctime(&self) -> i64 {
        self.as_inner().as_inner().st_ctime as i64
    }
    fn st_ctime_nsec(&self) -> i64 {
        self.as_inner().as_inner().st_ctime_nsec as i64
    }
    fn st_blksize(&self) -> u64 {
        self.as_inner().as_inner().st_blksize as u64
    }
    fn st_blocks(&self) -> u64 {
        self.as_inner().as_inner().st_blocks as u64
    }
 }
--- a/ctr-std/src/os/android/mod.rs
+++ b/ctr-std/src/os/android/mod.rs
@ -1,16 +0,0 @@
 // Copyright 2015 The Rust Project Developers. See the COPYRIGHT
 // file at the top-level directory of this distribution and at
 // http://rust-lang.org/COPYRIGHT.
 //
 // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
 // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 //! Android-specific definitions
 #![stable(feature = "raw_ext", since = "1.1.0")]
 pub mod raw;
 pub mod fs;
--- a/ctr-std/src/os/android/raw.rs
+++ b/ctr-std/src/os/android/raw.rs
@ -1,230 +0,0 @@
 // Copyright 2015 The Rust Project Developers. See the COPYRIGHT
 // file at the top-level directory of this distribution and at
 // http://rust-lang.org/COPYRIGHT.
 //
 // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
 // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 //! Android-specific raw type definitions
 #![stable(feature = "raw_ext", since = "1.1.0")]
 #![rustc_deprecated(since = "1.8.0",
                    reason = "these type aliases are no longer supported by \
                              the standard library, the `libc` crate on \
                              crates.io should be used instead for the correct \
                              definitions")]
 #![allow(deprecated)]
 use os::raw::c_long;
 #[stable(feature = "pthread_t", since = "1.8.0")]
 pub type pthread_t = c_long;
 #[doc(inline)]
 #[stable(feature = "raw_ext", since = "1.1.0")]
 pub use self::arch::{dev_t, mode_t, blkcnt_t, blksize_t, ino_t, nlink_t, off_t, stat, time_t};
 #[cfg(any(target_arch = "arm", target_arch = "x86"))]
 mod arch {
    use os::raw::{c_uint, c_uchar, c_ulonglong, c_longlong, c_ulong};
    use os::unix::raw::{uid_t, gid_t};
    #[stable(feature = "raw_ext", since = "1.1.0")]
    pub type dev_t = u64;
    #[stable(feature = "raw_ext", since = "1.1.0")]
    pub type mode_t = u32;
    #[stable(feature = "raw_ext", since = "1.1.0")]
    pub type blkcnt_t = u64;
    #[stable(feature = "raw_ext", since = "1.1.0")]
    pub type blksize_t = u64;
    #[stable(feature = "raw_ext", since = "1.1.0")]
    pub type ino_t = u64;
    #[stable(feature = "raw_ext", since = "1.1.0")]
    pub type nlink_t = u64;
    #[stable(feature = "raw_ext", since = "1.1.0")]
    pub type off_t = u64;
    #[stable(feature = "raw_ext", since = "1.1.0")]
    pub type time_t = i64;
    #[repr(C)]
    #[derive(Clone)]
    #[stable(feature = "raw_ext", since = "1.1.0")]
    pub struct stat {
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub st_dev: c_ulonglong,
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub __pad0: [c_uchar; 4],
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub __st_ino: u32,
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub st_mode: c_uint,
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub st_nlink: c_uint,
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub st_uid: uid_t,
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub st_gid: gid_t,
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub st_rdev: c_ulonglong,
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub __pad3: [c_uchar; 4],
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub st_size: c_longlong,
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub st_blksize: u32,
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub st_blocks: c_ulonglong,
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub st_atime: c_ulong,
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub st_atime_nsec: c_ulong,
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub st_mtime: c_ulong,
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub st_mtime_nsec: c_ulong,
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub st_ctime: c_ulong,
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub st_ctime_nsec: c_ulong,
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub st_ino: c_ulonglong,
    }
 }
 #[cfg(target_arch = "aarch64")]
 mod arch {
    use os::raw::{c_uchar, c_ulong};
    use os::unix::raw::{uid_t, gid_t};
    #[stable(feature = "raw_ext", since = "1.1.0")]
    pub type dev_t = u64;
    #[stable(feature = "raw_ext", since = "1.1.0")]
    pub type mode_t = u32;
    #[stable(feature = "raw_ext", since = "1.1.0")]
    pub type blkcnt_t = u64;
    #[stable(feature = "raw_ext", since = "1.1.0")]
    pub type blksize_t = u64;
    #[stable(feature = "raw_ext", since = "1.1.0")]
    pub type ino_t = u64;
    #[stable(feature = "raw_ext", since = "1.1.0")]
    pub type nlink_t = u64;
    #[stable(feature = "raw_ext", since = "1.1.0")]
    pub type off_t = u64;
    #[stable(feature = "raw_ext", since = "1.1.0")]
    pub type time_t = i64;
    #[repr(C)]
    #[derive(Clone)]
    #[stable(feature = "raw_ext", since = "1.1.0")]
    pub struct stat {
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub st_dev: dev_t,
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub __pad0: [c_uchar; 4],
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub __st_ino: ino_t,
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub st_mode: mode_t,
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub st_nlink: nlink_t,
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub st_uid: uid_t,
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub st_gid: gid_t,
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub st_rdev: dev_t,
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub __pad3: [c_uchar; 4],
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub st_size: off_t,
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub st_blksize: blksize_t,
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub st_blocks: blkcnt_t,
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub st_atime: time_t,
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub st_atime_nsec: c_ulong,
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub st_mtime: time_t,
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub st_mtime_nsec: c_ulong,
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub st_ctime: time_t,
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub st_ctime_nsec: c_ulong,
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub st_ino: ino_t,
    }
 }
 #[cfg(target_arch = "x86_64")]
 mod arch {
    use os::raw::{c_uint, c_long, c_ulong};
    use os::unix::raw::{uid_t, gid_t};
    #[stable(feature = "raw_ext", since = "1.1.0")]
    pub type dev_t = u64;
    #[stable(feature = "raw_ext", since = "1.1.0")]
    pub type mode_t = u32;
    #[stable(feature = "raw_ext", since = "1.1.0")]
    pub type blkcnt_t = u64;
    #[stable(feature = "raw_ext", since = "1.1.0")]
    pub type blksize_t = u64;
    #[stable(feature = "raw_ext", since = "1.1.0")]
    pub type ino_t = u64;
    #[stable(feature = "raw_ext", since = "1.1.0")]
    pub type nlink_t = u32;
    #[stable(feature = "raw_ext", since = "1.1.0")]
    pub type off_t = u64;
    #[stable(feature = "raw_ext", since = "1.1.0")]
    pub type time_t = i64;
    #[repr(C)]
    #[derive(Clone)]
    #[stable(feature = "raw_ext", since = "1.1.0")]
    pub struct stat {
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub st_dev: dev_t,
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub st_ino: ino_t,
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub st_nlink: c_ulong,
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub st_mode: c_uint,
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub st_uid: uid_t,
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub st_gid: gid_t,
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub st_rdev: dev_t,
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub st_size: i64,
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub st_blksize: c_long,
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub st_blocks: c_long,
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub st_atime: c_ulong,
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub st_atime_nsec: c_ulong,
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub st_mtime: c_ulong,
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub st_mtime_nsec: c_ulong,
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub st_ctime: c_ulong,
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub st_ctime_nsec: c_ulong,
        __unused: [c_long; 3],
    }
 }
--- a/ctr-std/src/os/bitrig/fs.rs
+++ b/ctr-std/src/os/bitrig/fs.rs
@ -1,151 +0,0 @@
 // Copyright 2016 The Rust Project Developers. See the COPYRIGHT
 // file at the top-level directory of this distribution and at
 // http://rust-lang.org/COPYRIGHT.
 //
 // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
 // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 #![stable(feature = "metadata_ext", since = "1.1.0")]
 use libc;
 use fs::Metadata;
 use sys_common::AsInner;
 #[allow(deprecated)]
 use os::bitrig::raw;
 /// OS-specific extensions to [`fs::Metadata`].
 ///
 /// [`fs::Metadata`]: ../../../../std/fs/struct.Metadata.html
 #[stable(feature = "metadata_ext", since = "1.1.0")]
 pub trait MetadataExt {
    /// Gain a reference to the underlying `stat` structure which contains
    /// the raw information returned by the OS.
    ///
    /// The contents of the returned `stat` are **not** consistent across
    /// Unix platforms. The `os::unix::fs::MetadataExt` trait contains the
    /// cross-Unix abstractions contained within the raw stat.
    #[stable(feature = "metadata_ext", since = "1.1.0")]
    #[rustc_deprecated(since = "1.8.0",
                       reason = "deprecated in favor of the accessor \
                                 methods of this trait")]
    #[allow(deprecated)]
    fn as_raw_stat(&self) -> &raw::stat;
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_dev(&self) -> u64;
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_ino(&self) -> u64;
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_mode(&self) -> u32;
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_nlink(&self) -> u64;
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_uid(&self) -> u32;
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_gid(&self) -> u32;
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_rdev(&self) -> u64;
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_size(&self) -> u64;
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_atime(&self) -> i64;
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_atime_nsec(&self) -> i64;
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_mtime(&self) -> i64;
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_mtime_nsec(&self) -> i64;
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_ctime(&self) -> i64;
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_ctime_nsec(&self) -> i64;
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_birthtime(&self) -> i64;
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_birthtime_nsec(&self) -> i64;
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_blksize(&self) -> u64;
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_blocks(&self) -> u64;
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_flags(&self) -> u32;
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_gen(&self) -> u32;
 }
 #[stable(feature = "metadata_ext", since = "1.1.0")]
 impl MetadataExt for Metadata {
    #[allow(deprecated)]
    fn as_raw_stat(&self) -> &raw::stat {
        unsafe {
            &*(self.as_inner().as_inner() as *const libc::stat
                                          as *const raw::stat)
        }
    }
    fn st_dev(&self) -> u64 {
        self.as_inner().as_inner().st_dev as u64
    }
    fn st_ino(&self) -> u64 {
        self.as_inner().as_inner().st_ino as u64
    }
    fn st_mode(&self) -> u32 {
        self.as_inner().as_inner().st_mode as u32
    }
    fn st_nlink(&self) -> u64 {
        self.as_inner().as_inner().st_nlink as u64
    }
    fn st_uid(&self) -> u32 {
        self.as_inner().as_inner().st_uid as u32
    }
    fn st_gid(&self) -> u32 {
        self.as_inner().as_inner().st_gid as u32
    }
    fn st_rdev(&self) -> u64 {
        self.as_inner().as_inner().st_rdev as u64
    }
    fn st_size(&self) -> u64 {
        self.as_inner().as_inner().st_size as u64
    }
    fn st_atime(&self) -> i64 {
        self.as_inner().as_inner().st_atime as i64
    }
    fn st_atime_nsec(&self) -> i64 {
        self.as_inner().as_inner().st_atime_nsec as i64
    }
    fn st_mtime(&self) -> i64 {
        self.as_inner().as_inner().st_mtime as i64
    }
    fn st_mtime_nsec(&self) -> i64 {
        self.as_inner().as_inner().st_mtime_nsec as i64
    }
    fn st_ctime(&self) -> i64 {
        self.as_inner().as_inner().st_ctime as i64
    }
    fn st_ctime_nsec(&self) -> i64 {
        self.as_inner().as_inner().st_ctime_nsec as i64
    }
    fn st_birthtime(&self) -> i64 {
        self.as_inner().as_inner().st_birthtime as i64
    }
    fn st_birthtime_nsec(&self) -> i64 {
        self.as_inner().as_inner().st_birthtime_nsec as i64
    }
    fn st_blksize(&self) -> u64 {
        self.as_inner().as_inner().st_blksize as u64
    }
    fn st_blocks(&self) -> u64 {
        self.as_inner().as_inner().st_blocks as u64
    }
    fn st_gen(&self) -> u32 {
        self.as_inner().as_inner().st_gen as u32
    }
    fn st_flags(&self) -> u32 {
        self.as_inner().as_inner().st_flags as u32
    }
 }
--- a/ctr-std/src/os/bitrig/mod.rs
+++ b/ctr-std/src/os/bitrig/mod.rs
@ -1,16 +0,0 @@
 // Copyright 2015 The Rust Project Developers. See the COPYRIGHT
 // file at the top-level directory of this distribution and at
 // http://rust-lang.org/COPYRIGHT.
 //
 // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
 // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 //! Bitrig-specific definitions
 #![stable(feature = "raw_ext", since = "1.1.0")]
 pub mod raw;
 pub mod fs;
--- a/ctr-std/src/os/bitrig/raw.rs
+++ b/ctr-std/src/os/bitrig/raw.rs
@ -1,81 +0,0 @@
 // Copyright 2015 The Rust Project Developers. See the COPYRIGHT
 // file at the top-level directory of this distribution and at
 // http://rust-lang.org/COPYRIGHT.
 //
 // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
 // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 //! Bitrig-specific raw type definitions
 #![stable(feature = "raw_ext", since = "1.1.0")]
 #![rustc_deprecated(since = "1.8.0",
                    reason = "these type aliases are no longer supported by \
                              the standard library, the `libc` crate on \
                              crates.io should be used instead for the correct \
                              definitions")]
 #![allow(deprecated)]
 use os::raw::c_long;
 use os::unix::raw::{uid_t, gid_t};
 #[stable(feature = "raw_ext", since = "1.1.0")] pub type blkcnt_t = u64;
 #[stable(feature = "raw_ext", since = "1.1.0")] pub type blksize_t = u64;
 #[stable(feature = "raw_ext", since = "1.1.0")] pub type dev_t = u64;
 #[stable(feature = "raw_ext", since = "1.1.0")] pub type fflags_t = u32;
 #[stable(feature = "raw_ext", since = "1.1.0")] pub type ino_t = u64;
 #[stable(feature = "raw_ext", since = "1.1.0")] pub type mode_t = u32;
 #[stable(feature = "raw_ext", since = "1.1.0")] pub type nlink_t = u64;
 #[stable(feature = "raw_ext", since = "1.1.0")] pub type off_t = u64;
 #[stable(feature = "raw_ext", since = "1.1.0")] pub type time_t = i64;
 #[stable(feature = "pthread_t", since = "1.8.0")]
 pub type pthread_t = usize;
 #[repr(C)]
 #[derive(Clone)]
 #[stable(feature = "raw_ext", since = "1.1.0")]
 pub struct stat {
    #[stable(feature = "raw_ext", since = "1.1.0")]
    pub st_mode: u32,
    #[stable(feature = "raw_ext", since = "1.1.0")]
    pub st_dev: i32,
    #[stable(feature = "raw_ext", since = "1.1.0")]
    pub st_ino: u64,
    #[stable(feature = "raw_ext", since = "1.1.0")]
    pub st_nlink: u32,
    #[stable(feature = "raw_ext", since = "1.1.0")]
    pub st_uid: u32,
    #[stable(feature = "raw_ext", since = "1.1.0")]
    pub st_gid: u32,
    #[stable(feature = "raw_ext", since = "1.1.0")]
    pub st_rdev: i32,
    #[stable(feature = "raw_ext", since = "1.1.0")]
    pub st_atime: i64,
    #[stable(feature = "raw_ext", since = "1.1.0")]
    pub st_atime_nsec: i64,
    #[stable(feature = "raw_ext", since = "1.1.0")]
    pub st_mtime: u64,
    #[stable(feature = "raw_ext", since = "1.1.0")]
    pub st_mtime_nsec: i64,
    #[stable(feature = "raw_ext", since = "1.1.0")]
    pub st_ctime: i64,
    #[stable(feature = "raw_ext", since = "1.1.0")]
    pub st_ctime_nsec: i64,
    #[stable(feature = "raw_ext", since = "1.1.0")]
    pub st_size: i64,
    #[stable(feature = "raw_ext", since = "1.1.0")]
    pub st_blocks: i64,
    #[stable(feature = "raw_ext", since = "1.1.0")]
    pub st_blksize: u32,
    #[stable(feature = "raw_ext", since = "1.1.0")]
    pub st_flags: u32,
    #[stable(feature = "raw_ext", since = "1.1.0")]
    pub st_gen: u32,
    #[stable(feature = "raw_ext", since = "1.1.0")]
    pub st_birthtime: i64,
    #[stable(feature = "raw_ext", since = "1.1.0")]
    pub st_birthtime_nsec: i64,
 }
--- a/ctr-std/src/os/dragonfly/fs.rs
+++ b/ctr-std/src/os/dragonfly/fs.rs
@ -1,146 +0,0 @@
 // Copyright 2016 The Rust Project Developers. See the COPYRIGHT
 // file at the top-level directory of this distribution and at
 // http://rust-lang.org/COPYRIGHT.
 //
 // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
 // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 #![stable(feature = "metadata_ext", since = "1.1.0")]
 use libc;
 use fs::Metadata;
 use sys_common::AsInner;
 #[allow(deprecated)]
 use os::dragonfly::raw;
 /// OS-specific extensions to [`fs::Metadata`].
 ///
 /// [`fs::Metadata`]: ../../../../std/fs/struct.Metadata.html
 #[stable(feature = "metadata_ext", since = "1.1.0")]
 pub trait MetadataExt {
    /// Gain a reference to the underlying `stat` structure which contains
    /// the raw information returned by the OS.
    ///
    /// The contents of the returned `stat` are **not** consistent across
    /// Unix platforms. The `os::unix::fs::MetadataExt` trait contains the
    /// cross-Unix abstractions contained within the raw stat.
    #[stable(feature = "metadata_ext", since = "1.1.0")]
    #[rustc_deprecated(since = "1.8.0",
                       reason = "deprecated in favor of the accessor \
                                 methods of this trait")]
    #[allow(deprecated)]
    fn as_raw_stat(&self) -> &raw::stat;
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_dev(&self) -> u64;
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_ino(&self) -> u64;
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_mode(&self) -> u32;
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_nlink(&self) -> u64;
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_uid(&self) -> u32;
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_gid(&self) -> u32;
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_rdev(&self) -> u64;
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_size(&self) -> u64;
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_atime(&self) -> i64;
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_atime_nsec(&self) -> i64;
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_mtime(&self) -> i64;
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_mtime_nsec(&self) -> i64;
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_ctime(&self) -> i64;
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_ctime_nsec(&self) -> i64;
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_blksize(&self) -> u64;
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_blocks(&self) -> u64;
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_flags(&self) -> u32;
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_gen(&self) -> u32;
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_lspare(&self) -> u32;
 }
 #[stable(feature = "metadata_ext", since = "1.1.0")]
 impl MetadataExt for Metadata {
    #[allow(deprecated)]
    fn as_raw_stat(&self) -> &raw::stat {
        unsafe {
            &*(self.as_inner().as_inner() as *const libc::stat
                                          as *const raw::stat)
        }
    }
    fn st_dev(&self) -> u64 {
        self.as_inner().as_inner().st_dev as u64
    }
    fn st_ino(&self) -> u64 {
        self.as_inner().as_inner().st_ino as u64
    }
    fn st_mode(&self) -> u32 {
        self.as_inner().as_inner().st_mode as u32
    }
    fn st_nlink(&self) -> u64 {
        self.as_inner().as_inner().st_nlink as u64
    }
    fn st_uid(&self) -> u32 {
        self.as_inner().as_inner().st_uid as u32
    }
    fn st_gid(&self) -> u32 {
        self.as_inner().as_inner().st_gid as u32
    }
    fn st_rdev(&self) -> u64 {
        self.as_inner().as_inner().st_rdev as u64
    }
    fn st_size(&self) -> u64 {
        self.as_inner().as_inner().st_size as u64
    }
    fn st_atime(&self) -> i64 {
        self.as_inner().as_inner().st_atime as i64
    }
    fn st_atime_nsec(&self) -> i64 {
        self.as_inner().as_inner().st_atime_nsec as i64
    }
    fn st_mtime(&self) -> i64 {
        self.as_inner().as_inner().st_mtime as i64
    }
    fn st_mtime_nsec(&self) -> i64 {
        self.as_inner().as_inner().st_mtime_nsec as i64
    }
    fn st_ctime(&self) -> i64 {
        self.as_inner().as_inner().st_ctime as i64
    }
    fn st_ctime_nsec(&self) -> i64 {
        self.as_inner().as_inner().st_ctime_nsec as i64
    }
    fn st_blksize(&self) -> u64 {
        self.as_inner().as_inner().st_blksize as u64
    }
    fn st_blocks(&self) -> u64 {
        self.as_inner().as_inner().st_blocks as u64
    }
    fn st_gen(&self) -> u32 {
        self.as_inner().as_inner().st_gen as u32
    }
    fn st_flags(&self) -> u32 {
        self.as_inner().as_inner().st_flags as u32
    }
    fn st_lspare(&self) -> u32 {
        self.as_inner().as_inner().st_lspare as u32
    }
 }
--- a/ctr-std/src/os/dragonfly/mod.rs
+++ b/ctr-std/src/os/dragonfly/mod.rs
@ -1,16 +0,0 @@
 // Copyright 2015 The Rust Project Developers. See the COPYRIGHT
 // file at the top-level directory of this distribution and at
 // http://rust-lang.org/COPYRIGHT.
 //
 // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
 // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 //! Dragonfly-specific definitions
 #![stable(feature = "raw_ext", since = "1.1.0")]
 pub mod raw;
 pub mod fs;
--- a/ctr-std/src/os/dragonfly/raw.rs
+++ b/ctr-std/src/os/dragonfly/raw.rs
@ -1,82 +0,0 @@
 // Copyright 2015 The Rust Project Developers. See the COPYRIGHT
 // file at the top-level directory of this distribution and at
 // http://rust-lang.org/COPYRIGHT.
 //
 // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
 // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 //! Dragonfly-specific raw type definitions
 #![stable(feature = "raw_ext", since = "1.1.0")]
 #![rustc_deprecated(since = "1.8.0",
                    reason = "these type aliases are no longer supported by \
                              the standard library, the `libc` crate on \
                              crates.io should be used instead for the correct \
                              definitions")]
 #![allow(deprecated)]
 use os::raw::c_long;
 #[stable(feature = "raw_ext", since = "1.1.0")] pub type blkcnt_t = u64;
 #[stable(feature = "raw_ext", since = "1.1.0")] pub type blksize_t = u64;
 #[stable(feature = "raw_ext", since = "1.1.0")] pub type dev_t = u64;
 #[stable(feature = "raw_ext", since = "1.1.0")] pub type fflags_t = u32;
 #[stable(feature = "raw_ext", since = "1.1.0")] pub type ino_t = u64;
 #[stable(feature = "raw_ext", since = "1.1.0")] pub type mode_t = u32;
 #[stable(feature = "raw_ext", since = "1.1.0")] pub type nlink_t = u64;
 #[stable(feature = "raw_ext", since = "1.1.0")] pub type off_t = u64;
 #[stable(feature = "raw_ext", since = "1.1.0")] pub type time_t = i64;
 #[stable(feature = "pthread_t", since = "1.8.0")]
 pub type pthread_t = usize;
 #[repr(C)]
 #[derive(Clone)]
 #[stable(feature = "raw_ext", since = "1.1.0")]
 pub struct stat {
    #[stable(feature = "raw_ext", since = "1.1.0")]
    pub st_dev: u32,
    #[stable(feature = "raw_ext", since = "1.1.0")]
    pub st_ino: u32,
    #[stable(feature = "raw_ext", since = "1.1.0")]
    pub st_mode: u16,
    #[stable(feature = "raw_ext", since = "1.1.0")]
    pub st_nlink: u16,
    #[stable(feature = "raw_ext", since = "1.1.0")]
    pub st_uid: u32,
    #[stable(feature = "raw_ext", since = "1.1.0")]
    pub st_gid: u32,
    #[stable(feature = "raw_ext", since = "1.1.0")]
    pub st_rdev: u32,
    #[stable(feature = "raw_ext", since = "1.1.0")]
    pub st_atime: c_long,
    #[stable(feature = "raw_ext", since = "1.1.0")]
    pub st_atime_nsec: c_long,
    #[stable(feature = "raw_ext", since = "1.1.0")]
    pub st_mtime: c_long,
    #[stable(feature = "raw_ext", since = "1.1.0")]
    pub st_mtime_nsec: c_long,
    #[stable(feature = "raw_ext", since = "1.1.0")]
    pub st_ctime: c_long,
    #[stable(feature = "raw_ext", since = "1.1.0")]
    pub st_ctime_nsec: c_long,
    #[stable(feature = "raw_ext", since = "1.1.0")]
    pub st_size: i64,
    #[stable(feature = "raw_ext", since = "1.1.0")]
    pub st_blocks: i64,
    #[stable(feature = "raw_ext", since = "1.1.0")]
    pub st_blksize: u32,
    #[stable(feature = "raw_ext", since = "1.1.0")]
    pub st_flags: u32,
    #[stable(feature = "raw_ext", since = "1.1.0")]
    pub st_gen: u32,
    #[stable(feature = "raw_ext", since = "1.1.0")]
    pub st_lspare: i32,
    #[stable(feature = "raw_ext", since = "1.1.0")]
    pub st_birthtime: c_long,
    #[stable(feature = "raw_ext", since = "1.1.0")]
    pub st_birthtime_nsec: c_long,
 }
--- a/ctr-std/src/os/emscripten/fs.rs
+++ b/ctr-std/src/os/emscripten/fs.rs
@ -1,130 +0,0 @@
 // Copyright 2016 The Rust Project Developers. See the COPYRIGHT
 // file at the top-level directory of this distribution and at
 // http://rust-lang.org/COPYRIGHT.
 //
 // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
 // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 #![stable(feature = "metadata_ext", since = "1.1.0")]
 use libc;
 use fs::Metadata;
 use sys_common::AsInner;
 #[allow(deprecated)]
 use os::emscripten::raw;
 /// OS-specific extensions to [`fs::Metadata`].
 ///
 /// [`fs::Metadata`]: ../../../../std/fs/struct.Metadata.html
 #[stable(feature = "metadata_ext", since = "1.1.0")]
 pub trait MetadataExt {
    /// Gain a reference to the underlying `stat` structure which contains
    /// the raw information returned by the OS.
    ///
    /// The contents of the returned `stat` are **not** consistent across
    /// Unix platforms. The `os::unix::fs::MetadataExt` trait contains the
    /// cross-Unix abstractions contained within the raw stat.
    #[stable(feature = "metadata_ext", since = "1.1.0")]
    #[rustc_deprecated(since = "1.8.0",
                       reason = "deprecated in favor of the accessor \
                                 methods of this trait")]
    #[allow(deprecated)]
    fn as_raw_stat(&self) -> &raw::stat;
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_dev(&self) -> u64;
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_ino(&self) -> u64;
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_mode(&self) -> u32;
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_nlink(&self) -> u64;
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_uid(&self) -> u32;
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_gid(&self) -> u32;
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_rdev(&self) -> u64;
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_size(&self) -> u64;
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_atime(&self) -> i64;
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_atime_nsec(&self) -> i64;
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_mtime(&self) -> i64;
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_mtime_nsec(&self) -> i64;
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_ctime(&self) -> i64;
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_ctime_nsec(&self) -> i64;
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_blksize(&self) -> u64;
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_blocks(&self) -> u64;
 }
 #[stable(feature = "metadata_ext", since = "1.1.0")]
 impl MetadataExt for Metadata {
    #[allow(deprecated)]
    fn as_raw_stat(&self) -> &raw::stat {
        unsafe {
            &*(self.as_inner().as_inner() as *const libc::stat64
                                          as *const raw::stat)
        }
    }
    fn st_dev(&self) -> u64 {
        self.as_inner().as_inner().st_dev as u64
    }
    fn st_ino(&self) -> u64 {
        self.as_inner().as_inner().st_ino as u64
    }
    fn st_mode(&self) -> u32 {
        self.as_inner().as_inner().st_mode as u32
    }
    fn st_nlink(&self) -> u64 {
        self.as_inner().as_inner().st_nlink as u64
    }
    fn st_uid(&self) -> u32 {
        self.as_inner().as_inner().st_uid as u32
    }
    fn st_gid(&self) -> u32 {
        self.as_inner().as_inner().st_gid as u32
    }
    fn st_rdev(&self) -> u64 {
        self.as_inner().as_inner().st_rdev as u64
    }
    fn st_size(&self) -> u64 {
        self.as_inner().as_inner().st_size as u64
    }
    fn st_atime(&self) -> i64 {
        self.as_inner().as_inner().st_atime as i64
    }
    fn st_atime_nsec(&self) -> i64 {
        self.as_inner().as_inner().st_atime_nsec as i64
    }
    fn st_mtime(&self) -> i64 {
        self.as_inner().as_inner().st_mtime as i64
    }
    fn st_mtime_nsec(&self) -> i64 {
        self.as_inner().as_inner().st_mtime_nsec as i64
    }
    fn st_ctime(&self) -> i64 {
        self.as_inner().as_inner().st_ctime as i64
    }
    fn st_ctime_nsec(&self) -> i64 {
        self.as_inner().as_inner().st_ctime_nsec as i64
    }
    fn st_blksize(&self) -> u64 {
        self.as_inner().as_inner().st_blksize as u64
    }
    fn st_blocks(&self) -> u64 {
        self.as_inner().as_inner().st_blocks as u64
    }
 }
--- a/ctr-std/src/os/emscripten/mod.rs
+++ b/ctr-std/src/os/emscripten/mod.rs
@ -1,16 +0,0 @@
 // Copyright 2015 The Rust Project Developers. See the COPYRIGHT
 // file at the top-level directory of this distribution and at
 // http://rust-lang.org/COPYRIGHT.
 //
 // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
 // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 //! Linux-specific definitions
 #![stable(feature = "raw_ext", since = "1.1.0")]
 pub mod raw;
 pub mod fs;
--- a/ctr-std/src/os/emscripten/raw.rs
+++ b/ctr-std/src/os/emscripten/raw.rs
@ -1,81 +0,0 @@
 // Copyright 2015 The Rust Project Developers. See the COPYRIGHT
 // file at the top-level directory of this distribution and at
 // http://rust-lang.org/COPYRIGHT.
 //
 // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
 // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 //! Emscripten-specific raw type definitions
 //! This is basically exactly the same as the linux definitions,
 //! except using the musl-specific stat64 structure in liblibc.
 #![stable(feature = "raw_ext", since = "1.1.0")]
 #![rustc_deprecated(since = "1.8.0",
                    reason = "these type aliases are no longer supported by \
                              the standard library, the `libc` crate on \
                              crates.io should be used instead for the correct \
                              definitions")]
 #![allow(deprecated)]
 use os::raw::{c_long, c_short, c_uint, c_ulong};
 #[stable(feature = "raw_ext", since = "1.1.0")] pub type dev_t = u64;
 #[stable(feature = "raw_ext", since = "1.1.0")] pub type mode_t = u32;
 #[stable(feature = "pthread_t", since = "1.8.0")]
 pub type pthread_t = c_ulong;
 #[doc(inline)]
 #[stable(feature = "raw_ext", since = "1.1.0")] pub type blkcnt_t = u64;
 #[stable(feature = "raw_ext", since = "1.1.0")] pub type blksize_t = u64;
 #[stable(feature = "raw_ext", since = "1.1.0")] pub type ino_t = u64;
 #[stable(feature = "raw_ext", since = "1.1.0")] pub type nlink_t = u64;
 #[stable(feature = "raw_ext", since = "1.1.0")] pub type off_t = u64;
 #[stable(feature = "raw_ext", since = "1.1.0")] pub type time_t = c_long;
 #[repr(C)]
 #[derive(Clone)]
 #[stable(feature = "raw_ext", since = "1.1.0")]
 pub struct stat {
    #[stable(feature = "raw_ext", since = "1.1.0")]
    pub st_dev: u64,
    #[stable(feature = "raw_ext", since = "1.1.0")]
    pub __pad1: c_short,
    #[stable(feature = "raw_ext", since = "1.1.0")]
    pub __st_ino: u32,
    #[stable(feature = "raw_ext", since = "1.1.0")]
    pub st_mode: u32,
    #[stable(feature = "raw_ext", since = "1.1.0")]
    pub st_nlink: u32,
    #[stable(feature = "raw_ext", since = "1.1.0")]
    pub st_uid: u32,
    #[stable(feature = "raw_ext", since = "1.1.0")]
    pub st_gid: u32,
    #[stable(feature = "raw_ext", since = "1.1.0")]
    pub st_rdev: u64,
    #[stable(feature = "raw_ext", since = "1.1.0")]
    pub __pad2: c_uint,
    #[stable(feature = "raw_ext", since = "1.1.0")]
    pub st_size: i64,
    #[stable(feature = "raw_ext", since = "1.1.0")]
    pub st_blksize: i32,
    #[stable(feature = "raw_ext", since = "1.1.0")]
    pub st_blocks: i64,
    #[stable(feature = "raw_ext", since = "1.1.0")]
    pub st_atime: time_t,
    #[stable(feature = "raw_ext", since = "1.1.0")]
    pub st_atime_nsec: c_long,
    #[stable(feature = "raw_ext", since = "1.1.0")]
    pub st_mtime: time_t,
    #[stable(feature = "raw_ext", since = "1.1.0")]
    pub st_mtime_nsec: c_long,
    #[stable(feature = "raw_ext", since = "1.1.0")]
    pub st_ctime: time_t,
    #[stable(feature = "raw_ext", since = "1.1.0")]
    pub st_ctime_nsec: c_long,
    #[stable(feature = "raw_ext", since = "1.1.0")]
    pub st_ino: u64,
 }
--- a/ctr-std/src/os/freebsd/fs.rs
+++ b/ctr-std/src/os/freebsd/fs.rs
@ -1,156 +0,0 @@
 // Copyright 2016 The Rust Project Developers. See the COPYRIGHT
 // file at the top-level directory of this distribution and at
 // http://rust-lang.org/COPYRIGHT.
 //
 // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
 // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 #![stable(feature = "metadata_ext", since = "1.1.0")]
 use libc;
 use fs::Metadata;
 use sys_common::AsInner;
 #[allow(deprecated)]
 use os::freebsd::raw;
 /// OS-specific extensions to [`fs::Metadata`].
 ///
 /// [`fs::Metadata`]: ../../../../std/fs/struct.Metadata.html
 #[stable(feature = "metadata_ext", since = "1.1.0")]
 pub trait MetadataExt {
    /// Gain a reference to the underlying `stat` structure which contains
    /// the raw information returned by the OS.
    ///
    /// The contents of the returned `stat` are **not** consistent across
    /// Unix platforms. The `os::unix::fs::MetadataExt` trait contains the
    /// cross-Unix abstractions contained within the raw stat.
    #[stable(feature = "metadata_ext", since = "1.1.0")]
    #[rustc_deprecated(since = "1.8.0",
                       reason = "deprecated in favor of the accessor \
                                 methods of this trait")]
    #[allow(deprecated)]
    fn as_raw_stat(&self) -> &raw::stat;
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_dev(&self) -> u64;
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_ino(&self) -> u64;
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_mode(&self) -> u32;
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_nlink(&self) -> u64;
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_uid(&self) -> u32;
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_gid(&self) -> u32;
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_rdev(&self) -> u64;
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_size(&self) -> u64;
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_atime(&self) -> i64;
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_atime_nsec(&self) -> i64;
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_mtime(&self) -> i64;
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_mtime_nsec(&self) -> i64;
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_ctime(&self) -> i64;
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_ctime_nsec(&self) -> i64;
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_birthtime(&self) -> i64;
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_birthtime_nsec(&self) -> i64;
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_blksize(&self) -> u64;
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_blocks(&self) -> u64;
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_flags(&self) -> u32;
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_gen(&self) -> u32;
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_lspare(&self) -> u32;
 }
 #[stable(feature = "metadata_ext", since = "1.1.0")]
 impl MetadataExt for Metadata {
    #[allow(deprecated)]
    fn as_raw_stat(&self) -> &raw::stat {
        unsafe {
            &*(self.as_inner().as_inner() as *const libc::stat
                                          as *const raw::stat)
        }
    }
    fn st_dev(&self) -> u64 {
        self.as_inner().as_inner().st_dev as u64
    }
    fn st_ino(&self) -> u64 {
        self.as_inner().as_inner().st_ino as u64
    }
    fn st_mode(&self) -> u32 {
        self.as_inner().as_inner().st_mode as u32
    }
    fn st_nlink(&self) -> u64 {
        self.as_inner().as_inner().st_nlink as u64
    }
    fn st_uid(&self) -> u32 {
        self.as_inner().as_inner().st_uid as u32
    }
    fn st_gid(&self) -> u32 {
        self.as_inner().as_inner().st_gid as u32
    }
    fn st_rdev(&self) -> u64 {
        self.as_inner().as_inner().st_rdev as u64
    }
    fn st_size(&self) -> u64 {
        self.as_inner().as_inner().st_size as u64
    }
    fn st_atime(&self) -> i64 {
        self.as_inner().as_inner().st_atime as i64
    }
    fn st_atime_nsec(&self) -> i64 {
        self.as_inner().as_inner().st_atime_nsec as i64
    }
    fn st_mtime(&self) -> i64 {
        self.as_inner().as_inner().st_mtime as i64
    }
    fn st_mtime_nsec(&self) -> i64 {
        self.as_inner().as_inner().st_mtime_nsec as i64
    }
    fn st_ctime(&self) -> i64 {
        self.as_inner().as_inner().st_ctime as i64
    }
    fn st_ctime_nsec(&self) -> i64 {
        self.as_inner().as_inner().st_ctime_nsec as i64
    }
    fn st_birthtime(&self) -> i64 {
        self.as_inner().as_inner().st_birthtime as i64
    }
    fn st_birthtime_nsec(&self) -> i64 {
        self.as_inner().as_inner().st_birthtime_nsec as i64
    }
    fn st_blksize(&self) -> u64 {
        self.as_inner().as_inner().st_blksize as u64
    }
    fn st_blocks(&self) -> u64 {
        self.as_inner().as_inner().st_blocks as u64
    }
    fn st_gen(&self) -> u32 {
        self.as_inner().as_inner().st_gen as u32
    }
    fn st_flags(&self) -> u32 {
        self.as_inner().as_inner().st_flags as u32
    }
    fn st_lspare(&self) -> u32 {
        self.as_inner().as_inner().st_lspare as u32
    }
 }
--- a/ctr-std/src/os/freebsd/mod.rs
+++ b/ctr-std/src/os/freebsd/mod.rs
@ -1,16 +0,0 @@
 // Copyright 2015 The Rust Project Developers. See the COPYRIGHT
 // file at the top-level directory of this distribution and at
 // http://rust-lang.org/COPYRIGHT.
 //
 // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
 // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 //! FreeBSD-specific definitions
 #![stable(feature = "raw_ext", since = "1.1.0")]
 pub mod raw;
 pub mod fs;
--- a/ctr-std/src/os/freebsd/raw.rs
+++ b/ctr-std/src/os/freebsd/raw.rs
@ -1,85 +0,0 @@
 // Copyright 2015 The Rust Project Developers. See the COPYRIGHT
 // file at the top-level directory of this distribution and at
 // http://rust-lang.org/COPYRIGHT.
 //
 // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
 // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 //! FreeBSD-specific raw type definitions
 #![stable(feature = "raw_ext", since = "1.1.0")]
 #![rustc_deprecated(since = "1.8.0",
                    reason = "these type aliases are no longer supported by \
                              the standard library, the `libc` crate on \
                              crates.io should be used instead for the correct \
                              definitions")]
 #![allow(deprecated)]
 use os::raw::c_long;
 #[stable(feature = "raw_ext", since = "1.1.0")] pub type blkcnt_t = u64;
 #[stable(feature = "raw_ext", since = "1.1.0")] pub type blksize_t = u64;
 #[stable(feature = "raw_ext", since = "1.1.0")] pub type dev_t = u64;
 #[stable(feature = "raw_ext", since = "1.1.0")] pub type fflags_t = u32;
 #[stable(feature = "raw_ext", since = "1.1.0")] pub type ino_t = u64;
 #[stable(feature = "raw_ext", since = "1.1.0")] pub type mode_t = u32;
 #[stable(feature = "raw_ext", since = "1.1.0")] pub type nlink_t = u64;
 #[stable(feature = "raw_ext", since = "1.1.0")] pub type off_t = u64;
 #[stable(feature = "raw_ext", since = "1.1.0")] pub type time_t = i64;
 #[stable(feature = "pthread_t", since = "1.8.0")]
 pub type pthread_t = usize;
 #[repr(C)]
 #[derive(Clone)]
 #[stable(feature = "raw_ext", since = "1.1.0")]
 pub struct stat {
    #[stable(feature = "raw_ext", since = "1.1.0")]
    pub st_dev: u32,
    #[stable(feature = "raw_ext", since = "1.1.0")]
    pub st_ino: u32,
    #[stable(feature = "raw_ext", since = "1.1.0")]
    pub st_mode: u16,
    #[stable(feature = "raw_ext", since = "1.1.0")]
    pub st_nlink: u16,
    #[stable(feature = "raw_ext", since = "1.1.0")]
    pub st_uid: u32,
    #[stable(feature = "raw_ext", since = "1.1.0")]
    pub st_gid: u32,
    #[stable(feature = "raw_ext", since = "1.1.0")]
    pub st_rdev: u32,
    #[stable(feature = "raw_ext", since = "1.1.0")]
    pub st_atime: c_long,
    #[stable(feature = "raw_ext", since = "1.1.0")]
    pub st_atime_nsec: c_long,
    #[stable(feature = "raw_ext", since = "1.1.0")]
    pub st_mtime: c_long,
    #[stable(feature = "raw_ext", since = "1.1.0")]
    pub st_mtime_nsec: c_long,
    #[stable(feature = "raw_ext", since = "1.1.0")]
    pub st_ctime: c_long,
    #[stable(feature = "raw_ext", since = "1.1.0")]
    pub st_ctime_nsec: c_long,
    #[stable(feature = "raw_ext", since = "1.1.0")]
    pub st_size: i64,
    #[stable(feature = "raw_ext", since = "1.1.0")]
    pub st_blocks: i64,
    #[stable(feature = "raw_ext", since = "1.1.0")]
    pub st_blksize: u32,
    #[stable(feature = "raw_ext", since = "1.1.0")]
    pub st_flags: u32,
    #[stable(feature = "raw_ext", since = "1.1.0")]
    pub st_gen: u32,
    #[stable(feature = "raw_ext", since = "1.1.0")]
    pub st_lspare: i32,
    #[stable(feature = "raw_ext", since = "1.1.0")]
    pub st_birthtime: c_long,
    #[stable(feature = "raw_ext", since = "1.1.0")]
    pub st_birthtime_nsec: c_long,
    #[cfg(target_arch = "x86")]
    #[stable(feature = "raw_ext", since = "1.1.0")]
    pub __unused: [u8; 8],
 }
--- a/ctr-std/src/os/fuchsia/fs.rs
+++ b/ctr-std/src/os/fuchsia/fs.rs
@ -1,105 +0,0 @@
 // Copyright 2016 The Rust Project Developers. See the COPYRIGHT
 // file at the top-level directory of this distribution and at
 // http://rust-lang.org/COPYRIGHT.
 //
 // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
 // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 #![stable(feature = "metadata_ext", since = "1.1.0")]
 use fs::Metadata;
 use sys_common::AsInner;
 /// OS-specific extensions to [`fs::Metadata`].
 ///
 /// [`fs::Metadata`]: ../../../../std/fs/struct.Metadata.html
 #[stable(feature = "metadata_ext", since = "1.1.0")]
 pub trait MetadataExt {
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_dev(&self) -> u64;
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_ino(&self) -> u64;
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_mode(&self) -> u32;
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_nlink(&self) -> u64;
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_uid(&self) -> u32;
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_gid(&self) -> u32;
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_rdev(&self) -> u64;
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_size(&self) -> u64;
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_atime(&self) -> i64;
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_atime_nsec(&self) -> i64;
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_mtime(&self) -> i64;
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_mtime_nsec(&self) -> i64;
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_ctime(&self) -> i64;
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_ctime_nsec(&self) -> i64;
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_blksize(&self) -> u64;
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_blocks(&self) -> u64;
 }
 #[stable(feature = "metadata_ext", since = "1.1.0")]
 impl MetadataExt for Metadata {
    fn st_dev(&self) -> u64 {
        self.as_inner().as_inner().st_dev as u64
    }
    fn st_ino(&self) -> u64 {
        self.as_inner().as_inner().st_ino as u64
    }
    fn st_mode(&self) -> u32 {
        self.as_inner().as_inner().st_mode as u32
    }
    fn st_nlink(&self) -> u64 {
        self.as_inner().as_inner().st_nlink as u64
    }
    fn st_uid(&self) -> u32 {
        self.as_inner().as_inner().st_uid as u32
    }
    fn st_gid(&self) -> u32 {
        self.as_inner().as_inner().st_gid as u32
    }
    fn st_rdev(&self) -> u64 {
        self.as_inner().as_inner().st_rdev as u64
    }
    fn st_size(&self) -> u64 {
        self.as_inner().as_inner().st_size as u64
    }
    fn st_atime(&self) -> i64 {
        self.as_inner().as_inner().st_atime as i64
    }
    fn st_atime_nsec(&self) -> i64 {
        self.as_inner().as_inner().st_atime_nsec as i64
    }
    fn st_mtime(&self) -> i64 {
        self.as_inner().as_inner().st_mtime as i64
    }
    fn st_mtime_nsec(&self) -> i64 {
        self.as_inner().as_inner().st_mtime_nsec as i64
    }
    fn st_ctime(&self) -> i64 {
        self.as_inner().as_inner().st_ctime as i64
    }
    fn st_ctime_nsec(&self) -> i64 {
        self.as_inner().as_inner().st_ctime_nsec as i64
    }
    fn st_blksize(&self) -> u64 {
        self.as_inner().as_inner().st_blksize as u64
    }
    fn st_blocks(&self) -> u64 {
        self.as_inner().as_inner().st_blocks as u64
    }
 }
--- a/ctr-std/src/os/fuchsia/mod.rs
+++ b/ctr-std/src/os/fuchsia/mod.rs
@ -1,16 +0,0 @@
 // Copyright 2015 The Rust Project Developers. See the COPYRIGHT
 // file at the top-level directory of this distribution and at
 // http://rust-lang.org/COPYRIGHT.
 //
 // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
 // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 //! Fuchsia-specific definitions
 #![stable(feature = "raw_ext", since = "1.1.0")]
 pub mod raw;
 pub mod fs;
--- a/ctr-std/src/os/fuchsia/raw.rs
+++ b/ctr-std/src/os/fuchsia/raw.rs
@ -1,270 +0,0 @@
 // Copyright 2015 The Rust Project Developers. See the COPYRIGHT
 // file at the top-level directory of this distribution and at
 // http://rust-lang.org/COPYRIGHT.
 //
 // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
 // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 //! Fuchsia-specific raw type definitions
 #![stable(feature = "raw_ext", since = "1.1.0")]
 #![rustc_deprecated(since = "1.8.0",
                    reason = "these type aliases are no longer supported by \
                              the standard library, the `libc` crate on \
                              crates.io should be used instead for the correct \
                              definitions")]
 #![allow(deprecated)]
 use os::raw::c_ulong;
 #[stable(feature = "raw_ext", since = "1.1.0")] pub type dev_t = u64;
 #[stable(feature = "raw_ext", since = "1.1.0")] pub type mode_t = u32;
 #[stable(feature = "pthread_t", since = "1.8.0")]
 pub type pthread_t = c_ulong;
 #[doc(inline)]
 #[stable(feature = "raw_ext", since = "1.1.0")]
 pub use self::arch::{off_t, ino_t, nlink_t, blksize_t, blkcnt_t, stat, time_t};
 #[cfg(any(target_arch = "x86",
          target_arch = "le32",
          target_arch = "powerpc",
          target_arch = "arm"))]
 mod arch {
    use os::raw::{c_long, c_short, c_uint};
    #[stable(feature = "raw_ext", since = "1.1.0")] pub type blkcnt_t = u64;
    #[stable(feature = "raw_ext", since = "1.1.0")] pub type blksize_t = u64;
    #[stable(feature = "raw_ext", since = "1.1.0")] pub type ino_t = u64;
    #[stable(feature = "raw_ext", since = "1.1.0")] pub type nlink_t = u64;
    #[stable(feature = "raw_ext", since = "1.1.0")] pub type off_t = u64;
    #[stable(feature = "raw_ext", since = "1.1.0")] pub type time_t = i64;
    #[repr(C)]
    #[derive(Clone)]
    #[stable(feature = "raw_ext", since = "1.1.0")]
    pub struct stat {
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub st_dev: u64,
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub __pad1: c_short,
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub __st_ino: u32,
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub st_mode: u32,
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub st_nlink: u32,
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub st_uid: u32,
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub st_gid: u32,
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub st_rdev: u64,
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub __pad2: c_uint,
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub st_size: i64,
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub st_blksize: i32,
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub st_blocks: i64,
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub st_atime: i32,
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub st_atime_nsec: c_long,
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub st_mtime: i32,
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub st_mtime_nsec: c_long,
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub st_ctime: i32,
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub st_ctime_nsec: c_long,
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub st_ino: u64,
    }
 }
 #[cfg(target_arch = "mips")]
 mod arch {
    use os::raw::{c_long, c_ulong};
    #[cfg(target_env = "musl")]
    #[stable(feature = "raw_ext", since = "1.1.0")] pub type blkcnt_t = i64;
    #[cfg(not(target_env = "musl"))]
    #[stable(feature = "raw_ext", since = "1.1.0")] pub type blkcnt_t = u64;
    #[stable(feature = "raw_ext", since = "1.1.0")] pub type blksize_t = u64;
    #[cfg(target_env = "musl")]
    #[stable(feature = "raw_ext", since = "1.1.0")] pub type ino_t = u64;
    #[cfg(not(target_env = "musl"))]
    #[stable(feature = "raw_ext", since = "1.1.0")] pub type ino_t = u64;
    #[stable(feature = "raw_ext", since = "1.1.0")] pub type nlink_t = u64;
    #[cfg(target_env = "musl")]
    #[stable(feature = "raw_ext", since = "1.1.0")] pub type off_t = u64;
    #[cfg(not(target_env = "musl"))]
    #[stable(feature = "raw_ext", since = "1.1.0")] pub type off_t = u64;
    #[stable(feature = "raw_ext", since = "1.1.0")] pub type time_t = i64;
    #[repr(C)]
    #[derive(Clone)]
    #[stable(feature = "raw_ext", since = "1.1.0")]
    pub struct stat {
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub st_dev: c_ulong,
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub st_pad1: [c_long; 3],
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub st_ino: u64,
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub st_mode: u32,
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub st_nlink: u32,
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub st_uid: u32,
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub st_gid: u32,
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub st_rdev: c_ulong,
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub st_pad2: [c_long; 2],
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub st_size: i64,
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub st_atime: i32,
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub st_atime_nsec: c_long,
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub st_mtime: i32,
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub st_mtime_nsec: c_long,
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub st_ctime: i32,
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub st_ctime_nsec: c_long,
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub st_blksize: i32,
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub st_blocks: i64,
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub st_pad5: [c_long; 14],
    }
 }
 #[cfg(target_arch = "mips64")]
 mod arch {
    pub use libc::{off_t, ino_t, nlink_t, blksize_t, blkcnt_t, stat, time_t};
 }
 #[cfg(target_arch = "aarch64")]
 mod arch {
    use os::raw::{c_long, c_int};
    #[stable(feature = "raw_ext", since = "1.1.0")] pub type blkcnt_t = u64;
    #[stable(feature = "raw_ext", since = "1.1.0")] pub type blksize_t = u64;
    #[stable(feature = "raw_ext", since = "1.1.0")] pub type ino_t = u64;
    #[stable(feature = "raw_ext", since = "1.1.0")] pub type nlink_t = u64;
    #[stable(feature = "raw_ext", since = "1.1.0")] pub type off_t = u64;
    #[stable(feature = "raw_ext", since = "1.1.0")] pub type time_t = i64;
    #[repr(C)]
    #[derive(Clone)]
    #[stable(feature = "raw_ext", since = "1.1.0")]
    pub struct stat {
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub st_dev: u64,
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub st_ino: u64,
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub st_mode: u32,
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub st_nlink: u32,
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub st_uid: u32,
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub st_gid: u32,
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub st_rdev: u64,
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub __pad1: u64,
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub st_size: i64,
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub st_blksize: i32,
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub __pad2: c_int,
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub st_blocks: i64,
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub st_atime: i64,
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub st_atime_nsec: c_long,
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub st_mtime: i64,
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub st_mtime_nsec: c_long,
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub st_ctime: i64,
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub st_ctime_nsec: c_long,
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub __unused: [c_int; 2],
    }
 }
 #[cfg(target_arch = "x86_64")]
 mod arch {
    use os::raw::{c_long, c_int};
    #[stable(feature = "raw_ext", since = "1.1.0")] pub type blkcnt_t = u64;
    #[stable(feature = "raw_ext", since = "1.1.0")] pub type blksize_t = u64;
    #[stable(feature = "raw_ext", since = "1.1.0")] pub type ino_t = u64;
    #[stable(feature = "raw_ext", since = "1.1.0")] pub type nlink_t = u64;
    #[stable(feature = "raw_ext", since = "1.1.0")] pub type off_t = u64;
    #[stable(feature = "raw_ext", since = "1.1.0")] pub type time_t = i64;
    #[repr(C)]
    #[derive(Clone)]
    #[stable(feature = "raw_ext", since = "1.1.0")]
    pub struct stat {
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub st_dev: u64,
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub st_ino: u64,
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub st_nlink: u64,
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub st_mode: u32,
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub st_uid: u32,
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub st_gid: u32,
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub __pad0: c_int,
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub st_rdev: u64,
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub st_size: i64,
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub st_blksize: i64,
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub st_blocks: i64,
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub st_atime: i64,
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub st_atime_nsec: c_long,
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub st_mtime: i64,
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub st_mtime_nsec: c_long,
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub st_ctime: i64,
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub st_ctime_nsec: c_long,
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub __unused: [c_long; 3],
    }
 }
--- a/ctr-std/src/os/haiku/fs.rs
+++ b/ctr-std/src/os/haiku/fs.rs
@ -1,140 +0,0 @@
 // Copyright 2016 The Rust Project Developers. See the COPYRIGHT
 // file at the top-level directory of this distribution and at
 // http://rust-lang.org/COPYRIGHT.
 //
 // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
 // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 #![stable(feature = "metadata_ext", since = "1.1.0")]
 use libc;
 use fs::Metadata;
 use sys_common::AsInner;
 #[allow(deprecated)]
 use os::haiku::raw;
 /// OS-specific extensions to [`fs::Metadata`].
 ///
 /// [`fs::Metadata`]: ../../../../std/fs/struct.Metadata.html
 #[stable(feature = "metadata_ext", since = "1.1.0")]
 pub trait MetadataExt {
    /// Gain a reference to the underlying `stat` structure which contains
    /// the raw information returned by the OS.
    ///
    /// The contents of the returned `stat` are **not** consistent across
    /// Unix platforms. The `os::unix::fs::MetadataExt` trait contains the
    /// cross-Unix abstractions contained within the raw stat.
    #[stable(feature = "metadata_ext", since = "1.1.0")]
    #[rustc_deprecated(since = "1.8.0",
                       reason = "deprecated in favor of the accessor \
                                 methods of this trait")]
    #[allow(deprecated)]
    fn as_raw_stat(&self) -> &raw::stat;
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_dev(&self) -> u64;
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_ino(&self) -> u64;
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_mode(&self) -> u32;
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_nlink(&self) -> u64;
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_uid(&self) -> u32;
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_gid(&self) -> u32;
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_rdev(&self) -> u64;
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_size(&self) -> u64;
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_atime(&self) -> i64;
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_atime_nsec(&self) -> i64;
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_mtime(&self) -> i64;
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_mtime_nsec(&self) -> i64;
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_ctime(&self) -> i64;
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_ctime_nsec(&self) -> i64;
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_crtime(&self) -> i64;
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_crtime_nsec(&self) -> i64;
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_blksize(&self) -> u64;
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_blocks(&self) -> u64;
 }
 #[stable(feature = "metadata_ext", since = "1.1.0")]
 impl MetadataExt for Metadata {
    #[allow(deprecated)]
    fn as_raw_stat(&self) -> &raw::stat {
        unsafe {
            &*(self.as_inner().as_inner() as *const libc::stat
                                          as *const raw::stat)
        }
    }
    fn st_dev(&self) -> u64 {
        self.as_inner().as_inner().st_dev as u64
    }
    fn st_ino(&self) -> u64 {
        self.as_inner().as_inner().st_ino as u64
    }
    fn st_mode(&self) -> u32 {
        self.as_inner().as_inner().st_mode as u32
    }
    fn st_nlink(&self) -> u64 {
        self.as_inner().as_inner().st_nlink as u64
    }
    fn st_uid(&self) -> u32 {
        self.as_inner().as_inner().st_uid as u32
    }
    fn st_gid(&self) -> u32 {
        self.as_inner().as_inner().st_gid as u32
    }
    fn st_rdev(&self) -> u64 {
        self.as_inner().as_inner().st_rdev as u64
    }
    fn st_size(&self) -> u64 {
        self.as_inner().as_inner().st_size as u64
    }
    fn st_atime(&self) -> i64 {
        self.as_inner().as_inner().st_atime as i64
    }
    fn st_atime_nsec(&self) -> i64 {
        self.as_inner().as_inner().st_atime_nsec as i64
    }
    fn st_mtime(&self) -> i64 {
        self.as_inner().as_inner().st_mtime as i64
    }
    fn st_mtime_nsec(&self) -> i64 {
        self.as_inner().as_inner().st_mtime_nsec as i64
    }
    fn st_ctime(&self) -> i64 {
        self.as_inner().as_inner().st_ctime as i64
    }
    fn st_ctime_nsec(&self) -> i64 {
        self.as_inner().as_inner().st_ctime_nsec as i64
    }
    fn st_crtime(&self) -> i64 {
        self.as_inner().as_inner().st_crtime as i64
    }
    fn st_crtime_nsec(&self) -> i64 {
        self.as_inner().as_inner().st_crtime_nsec as i64
    }
    fn st_blksize(&self) -> u64 {
        self.as_inner().as_inner().st_blksize as u64
    }
    fn st_blocks(&self) -> u64 {
        self.as_inner().as_inner().st_blocks as u64
    }
 }
--- a/ctr-std/src/os/haiku/mod.rs
+++ b/ctr-std/src/os/haiku/mod.rs
@ -1,16 +0,0 @@
 // Copyright 2015 The Rust Project Developers. See the COPYRIGHT
 // file at the top-level directory of this distribution and at
 // http://rust-lang.org/COPYRIGHT.
 //
 // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
 // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 //! Haiku-specific definitions
 #![stable(feature = "raw_ext", since = "1.1.0")]
 pub mod raw;
 pub mod fs;
--- a/ctr-std/src/os/haiku/raw.rs
+++ b/ctr-std/src/os/haiku/raw.rs
@ -1,74 +0,0 @@
 // Copyright 2015 The Rust Project Developers. See the COPYRIGHT
 // file at the top-level directory of this distribution and at
 // http://rust-lang.org/COPYRIGHT.
 //
 // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
 // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 //! Haiku-specific raw type definitions
 #![stable(feature = "raw_ext", since = "1.1.0")]
 #![allow(deprecated)]
 use os::raw::{c_long};
 use os::unix::raw::{uid_t, gid_t};
 // Use the direct definition of usize, instead of uintptr_t like in libc
 #[stable(feature = "pthread_t", since = "1.8.0")] pub type pthread_t = usize;
 #[stable(feature = "raw_ext", since = "1.1.0")] pub type blkcnt_t = i64;
 #[stable(feature = "raw_ext", since = "1.1.0")] pub type blksize_t = i32;
 #[stable(feature = "raw_ext", since = "1.1.0")] pub type dev_t = i32;
 #[stable(feature = "raw_ext", since = "1.1.0")] pub type ino_t = i64;
 #[stable(feature = "raw_ext", since = "1.1.0")] pub type mode_t = u32;
 #[stable(feature = "raw_ext", since = "1.1.0")] pub type nlink_t = i32;
 #[stable(feature = "raw_ext", since = "1.1.0")] pub type off_t = i64;
 #[stable(feature = "raw_ext", since = "1.1.0")] pub type time_t = i32;
 #[repr(C)]
 #[derive(Clone)]
 #[stable(feature = "raw_ext", since = "1.1.0")]
 pub struct stat {
    #[stable(feature = "raw_ext", since = "1.1.0")]
    pub st_dev: dev_t,
    #[stable(feature = "raw_ext", since = "1.1.0")]
    pub st_ino: ino_t,
    #[stable(feature = "raw_ext", since = "1.1.0")]
    pub st_mode: mode_t,
    #[stable(feature = "raw_ext", since = "1.1.0")]
    pub st_nlink: nlink_t,
    #[stable(feature = "raw_ext", since = "1.1.0")]
    pub st_uid: uid_t,
    #[stable(feature = "raw_ext", since = "1.1.0")]
    pub st_gid: gid_t,
    #[stable(feature = "raw_ext", since = "1.1.0")]
    pub st_size: off_t,
    #[stable(feature = "raw_ext", since = "1.1.0")]
    pub st_rdev: dev_t,
    #[stable(feature = "raw_ext", since = "1.1.0")]
    pub st_blksize: blksize_t,
    #[stable(feature = "raw_ext", since = "1.1.0")]
    pub st_atime: time_t,
    #[stable(feature = "raw_ext", since = "1.1.0")]
    pub st_atime_nsec: c_long,
    #[stable(feature = "raw_ext", since = "1.1.0")]
    pub st_mtime: time_t,
    #[stable(feature = "raw_ext", since = "1.1.0")]
    pub st_mtime_nsec: c_long,
    #[stable(feature = "raw_ext", since = "1.1.0")]
    pub st_ctime: time_t,
    #[stable(feature = "raw_ext", since = "1.1.0")]
    pub st_ctime_nsec: c_long,
    #[stable(feature = "raw_ext", since = "1.1.0")]
    pub st_crtime: time_t,
    #[stable(feature = "raw_ext", since = "1.1.0")]
    pub st_crtime_nsec: c_long,
    #[stable(feature = "raw_ext", since = "1.1.0")]
    pub st_type: u32,
    #[stable(feature = "raw_ext", since = "1.1.0")]
    pub st_blocks: blkcnt_t,
 }
--- a/ctr-std/src/os/hermit/fs.rs
+++ b/ctr-std/src/os/hermit/fs.rs
@ -1,389 +0,0 @@
 // Copyright 2018 The Rust Project Developers. See the COPYRIGHT
 // file at the top-level directory of this distribution and at
 // http://rust-lang.org/COPYRIGHT.
 //
 // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
 // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 #![stable(feature = "metadata_ext", since = "1.1.0")]
 use libc;
 use fs::Metadata;
 use sys_common::AsInner;
 #[allow(deprecated)]
 use os::hermit::raw;
 /// OS-specific extensions to [`fs::Metadata`].
 ///
 /// [`fs::Metadata`]: ../../../../std/fs/struct.Metadata.html
 #[stable(feature = "metadata_ext", since = "1.1.0")]
 pub trait MetadataExt {
    /// Gain a reference to the underlying `stat` structure which contains
    /// the raw information returned by the OS.
    ///
    /// The contents of the returned [`stat`] are **not** consistent across
    /// Unix platforms. The `os::unix::fs::MetadataExt` trait contains the
    /// cross-Unix abstractions contained within the raw stat.
    ///
    /// [`stat`]: ../../../../std/os/linux/raw/struct.stat.html
    ///
    /// # Examples
    ///
    /// ```no_run
    /// use std::fs;
    /// use std::io;
    /// use std::os::linux::fs::MetadataExt;
    ///
    /// fn main() -> io::Result<()> {
    ///     let meta = fs::metadata("some_file")?;
    ///     let stat = meta.as_raw_stat();
    ///     Ok(())
    /// }
    /// ```
    #[stable(feature = "metadata_ext", since = "1.1.0")]
    #[rustc_deprecated(since = "1.8.0",
                       reason = "deprecated in favor of the accessor \
                                 methods of this trait")]
    #[allow(deprecated)]
    fn as_raw_stat(&self) -> &raw::stat;
    /// Returns the device ID on which this file resides.
    ///
    /// # Examples
    ///
    /// ```no_run
    /// use std::fs;
    /// use std::io;
    /// use std::os::linux::fs::MetadataExt;
    ///
    /// fn main() -> io::Result<()> {
    ///     let meta = fs::metadata("some_file")?;
    ///     println!("{}", meta.st_dev());
    ///     Ok(())
    /// }
    /// ```
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_dev(&self) -> u64;
    /// Returns the inode number.
    ///
    /// # Examples
    ///
    /// ```no_run
    /// use std::fs;
    /// use std::io;
    /// use std::os::linux::fs::MetadataExt;
    ///
    /// fn main() -> io::Result<()> {
    ///     let meta = fs::metadata("some_file")?;
    ///     println!("{}", meta.st_ino());
    ///     Ok(())
    /// }
    /// ```
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_ino(&self) -> u64;
    /// Returns the file type and mode.
    ///
    /// # Examples
    ///
    /// ```no_run
    /// use std::fs;
    /// use std::io;
    /// use std::os::linux::fs::MetadataExt;
    ///
    /// fn main() -> io::Result<()> {
    ///     let meta = fs::metadata("some_file")?;
    ///     println!("{}", meta.st_mode());
    ///     Ok(())
    /// }
    /// ```
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_mode(&self) -> u32;
    /// Returns the number of hard links to file.
    ///
    /// # Examples
    ///
    /// ```no_run
    /// use std::fs;
    /// use std::io;
    /// use std::os::linux::fs::MetadataExt;
    ///
    /// fn main() -> io::Result<()> {
    ///     let meta = fs::metadata("some_file")?;
    ///     println!("{}", meta.st_nlink());
    ///     Ok(())
    /// }
    /// ```
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_nlink(&self) -> u64;
    /// Returns the user ID of the file owner.
    ///
    /// # Examples
    ///
    /// ```no_run
    /// use std::fs;
    /// use std::io;
    /// use std::os::linux::fs::MetadataExt;
    ///
    /// fn main() -> io::Result<()> {
    ///     let meta = fs::metadata("some_file")?;
    ///     println!("{}", meta.st_uid());
    ///     Ok(())
    /// }
    /// ```
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_uid(&self) -> u32;
    /// Returns the group ID of the file owner.
    ///
    /// # Examples
    ///
    /// ```no_run
    /// use std::fs;
    /// use std::io;
    /// use std::os::linux::fs::MetadataExt;
    ///
    /// fn main() -> io::Result<()> {
    ///     let meta = fs::metadata("some_file")?;
    ///     println!("{}", meta.st_gid());
    ///     Ok(())
    /// }
    /// ```
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_gid(&self) -> u32;
    /// Returns the device ID that this file represents. Only relevant for special file.
    ///
    /// # Examples
    ///
    /// ```no_run
    /// use std::fs;
    /// use std::io;
    /// use std::os::linux::fs::MetadataExt;
    ///
    /// fn main() -> io::Result<()> {
    ///     let meta = fs::metadata("some_file")?;
    ///     println!("{}", meta.st_rdev());
    ///     Ok(())
    /// }
    /// ```
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_rdev(&self) -> u64;
    /// Returns the size of the file (if it is a regular file or a symbolic link) in bytes.
    ///
    /// The size of a symbolic link is the length of the pathname it contains,
    /// without a terminating null byte.
    ///
    /// # Examples
    ///
    /// ```no_run
    /// use std::fs;
    /// use std::io;
    /// use std::os::linux::fs::MetadataExt;
    ///
    /// fn main() -> io::Result<()> {
    ///     let meta = fs::metadata("some_file")?;
    ///     println!("{}", meta.st_size());
    ///     Ok(())
    /// }
    /// ```
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_size(&self) -> u64;
    /// Returns the last access time.
    ///
    /// # Examples
    ///
    /// ```no_run
    /// use std::fs;
    /// use std::io;
    /// use std::os::linux::fs::MetadataExt;
    ///
    /// fn main() -> io::Result<()> {
    ///     let meta = fs::metadata("some_file")?;
    ///     println!("{}", meta.st_atime());
    ///     Ok(())
    /// }
    /// ```
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_atime(&self) -> i64;
    /// Returns the last access time, nano seconds part.
    ///
    /// # Examples
    ///
    /// ```no_run
    /// use std::fs;
    /// use std::io;
    /// use std::os::linux::fs::MetadataExt;
    ///
    /// fn main() -> io::Result<()> {
    ///     let meta = fs::metadata("some_file")?;
    ///     println!("{}", meta.st_atime_nsec());
    ///     Ok(())
    /// }
    /// ```
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_atime_nsec(&self) -> i64;
    /// Returns the last modification time.
    ///
    /// # Examples
    ///
    /// ```no_run
    /// use std::fs;
    /// use std::io;
    /// use std::os::linux::fs::MetadataExt;
    ///
    /// fn main() -> io::Result<()> {
    ///     let meta = fs::metadata("some_file")?;
    ///     println!("{}", meta.st_mtime());
    ///     Ok(())
    /// }
    /// ```
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_mtime(&self) -> i64;
    /// Returns the last modification time, nano seconds part.
    ///
    /// # Examples
    ///
    /// ```no_run
    /// use std::fs;
    /// use std::io;
    /// use std::os::linux::fs::MetadataExt;
    ///
    /// fn main() -> io::Result<()> {
    ///     let meta = fs::metadata("some_file")?;
    ///     println!("{}", meta.st_mtime_nsec());
    ///     Ok(())
    /// }
    /// ```
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_mtime_nsec(&self) -> i64;
    /// Returns the last status change time.
    ///
    /// # Examples
    ///
    /// ```no_run
    /// use std::fs;
    /// use std::io;
    /// use std::os::linux::fs::MetadataExt;
    ///
    /// fn main() -> io::Result<()> {
    ///     let meta = fs::metadata("some_file")?;
    ///     println!("{}", meta.st_ctime());
    ///     Ok(())
    /// }
    /// ```
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_ctime(&self) -> i64;
    /// Returns the last status change time, nano seconds part.
    ///
    /// # Examples
    ///
    /// ```no_run
    /// use std::fs;
    /// use std::io;
    /// use std::os::linux::fs::MetadataExt;
    ///
    /// fn main() -> io::Result<()> {
    ///     let meta = fs::metadata("some_file")?;
    ///     println!("{}", meta.st_ctime_nsec());
    ///     Ok(())
    /// }
    /// ```
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_ctime_nsec(&self) -> i64;
    /// Returns the "preferred" blocksize for efficient filesystem I/O.
    ///
    /// # Examples
    ///
    /// ```no_run
    /// use std::fs;
    /// use std::io;
    /// use std::os::linux::fs::MetadataExt;
    ///
    /// fn main() -> io::Result<()> {
    ///     let meta = fs::metadata("some_file")?;
    ///     println!("{}", meta.st_blksize());
    ///     Ok(())
    /// }
    /// ```
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_blksize(&self) -> u64;
    /// Returns the number of blocks allocated to the file, 512-byte units.
    ///
    /// # Examples
    ///
    /// ```no_run
    /// use std::fs;
    /// use std::io;
    /// use std::os::linux::fs::MetadataExt;
    ///
    /// fn main() -> io::Result<()> {
    ///     let meta = fs::metadata("some_file")?;
    ///     println!("{}", meta.st_blocks());
    ///     Ok(())
    /// }
    /// ```
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_blocks(&self) -> u64;
 }
 #[stable(feature = "metadata_ext", since = "1.1.0")]
 impl MetadataExt for Metadata {
    #[allow(deprecated)]
    fn as_raw_stat(&self) -> &raw::stat {
        unsafe {
            &*(self.as_inner().as_inner() as *const libc::stat64
                                          as *const raw::stat)
        }
    }
    fn st_dev(&self) -> u64 {
        self.as_inner().as_inner().st_dev as u64
    }
    fn st_ino(&self) -> u64 {
        self.as_inner().as_inner().st_ino as u64
    }
    fn st_mode(&self) -> u32 {
        self.as_inner().as_inner().st_mode as u32
    }
    fn st_nlink(&self) -> u64 {
        self.as_inner().as_inner().st_nlink as u64
    }
    fn st_uid(&self) -> u32 {
        self.as_inner().as_inner().st_uid as u32
    }
    fn st_gid(&self) -> u32 {
        self.as_inner().as_inner().st_gid as u32
    }
    fn st_rdev(&self) -> u64 {
        self.as_inner().as_inner().st_rdev as u64
    }
    fn st_size(&self) -> u64 {
        self.as_inner().as_inner().st_size as u64
    }
    fn st_atime(&self) -> i64 {
        self.as_inner().as_inner().st_atime as i64
    }
    fn st_atime_nsec(&self) -> i64 {
        self.as_inner().as_inner().st_atime_nsec as i64
    }
    fn st_mtime(&self) -> i64 {
        self.as_inner().as_inner().st_mtime as i64
    }
    fn st_mtime_nsec(&self) -> i64 {
        self.as_inner().as_inner().st_mtime_nsec as i64
    }
    fn st_ctime(&self) -> i64 {
        self.as_inner().as_inner().st_ctime as i64
    }
    fn st_ctime_nsec(&self) -> i64 {
        self.as_inner().as_inner().st_ctime_nsec as i64
    }
    fn st_blksize(&self) -> u64 {
        self.as_inner().as_inner().st_blksize as u64
    }
    fn st_blocks(&self) -> u64 {
        self.as_inner().as_inner().st_blocks as u64
    }
 }
--- a/ctr-std/src/os/hermit/mod.rs
+++ b/ctr-std/src/os/hermit/mod.rs
@ -1,16 +0,0 @@
 // Copyright 2018 The Rust Project Developers. See the COPYRIGHT
 // file at the top-level directory of this distribution and at
 // http://rust-lang.org/COPYRIGHT.
 //
 // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
 // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 //! HermitCore-specific definitions
 #![stable(feature = "raw_ext", since = "1.1.0")]
 pub mod raw;
 pub mod fs;
--- a/ctr-std/src/os/hermit/raw.rs
+++ b/ctr-std/src/os/hermit/raw.rs
@ -1,27 +0,0 @@
 // Copyright 2018 The Rust Project Developers. See the COPYRIGHT
 // file at the top-level directory of this distribution and at
 // http://rust-lang.org/COPYRIGHT.
 //
 // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
 // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 //! HermitCore-specific raw type definitions
 #![stable(feature = "raw_ext", since = "1.1.0")]
 #![rustc_deprecated(since = "1.8.0",
                    reason = "these type aliases are no longer supported by \
                              the standard library, the `libc` crate on \
                              crates.io should be used instead for the correct \
                              definitions")]
 #![allow(deprecated)]
 #![allow(missing_debug_implementations)]
 #[stable(feature = "pthread_t", since = "1.8.0")]
 pub use libc::pthread_t;
 #[doc(inline)]
 #[stable(feature = "raw_ext", since = "1.1.0")]
 pub use libc::{dev_t, mode_t, off_t, ino_t, nlink_t, blksize_t, blkcnt_t, stat, time_t};
--- a/ctr-std/src/os/horizon/fs.rs
+++ b/ctr-std/src/os/horizon/fs.rs
@ -1,393 +0,0 @@
 // Copyright 2016 The Rust Project Developers. See the COPYRIGHT
 // file at the top-level directory of this distribution and at
 // http://rust-lang.org/COPYRIGHT.
 //
 // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
 // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 #![stable(feature = "metadata_ext", since = "1.1.0")]
 use libc;
 use fs::Metadata;
 use sys_common::AsInner;
 #[allow(deprecated)]
 use os::horizon::raw;
 /// OS-specific extensions to [`fs::Metadata`].
 ///
 /// [`fs::Metadata`]: ../../../../std/fs/struct.Metadata.html
 #[stable(feature = "metadata_ext", since = "1.1.0")]
 pub trait MetadataExt {
    /// Gain a reference to the underlying `stat` structure which contains
    /// the raw information returned by the OS.
    ///
    /// The contents of the returned [`stat`] are **not** consistent across
    /// Unix platforms. The `os::unix::fs::MetadataExt` trait contains the
    /// cross-Unix abstractions contained within the raw stat.
    ///
    /// [`stat`]: ../../../../std/os/linux/raw/struct.stat.html
    ///
    /// # Examples
    ///
    /// ```no_run
    /// use std::fs;
    /// use std::io;
    /// use std::os::linux::fs::MetadataExt;
    ///
    /// fn main() -> io::Result<()> {
    ///     let meta = fs::metadata("some_file")?;
    ///     let stat = meta.as_raw_stat();
    ///     Ok(())
    /// }
    /// ```
    #[stable(feature = "metadata_ext", since = "1.1.0")]
    #[rustc_deprecated(since = "1.8.0",
                       reason = "deprecated in favor of the accessor \
                                 methods of this trait")]
    #[allow(deprecated)]
    fn as_raw_stat(&self) -> &raw::stat;
    /// Returns the device ID on which this file resides.
    ///
    /// # Examples
    ///
    /// ```no_run
    /// use std::fs;
    /// use std::io;
    /// use std::os::linux::fs::MetadataExt;
    ///
    /// fn main() -> io::Result<()> {
    ///     let meta = fs::metadata("some_file")?;
    ///     println!("{}", meta.st_dev());
    ///     Ok(())
    /// }
    /// ```
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_dev(&self) -> u64;
    /// Returns the inode number.
    ///
    /// # Examples
    ///
    /// ```no_run
    /// use std::fs;
    /// use std::io;
    /// use std::os::linux::fs::MetadataExt;
    ///
    /// fn main() -> io::Result<()> {
    ///     let meta = fs::metadata("some_file")?;
    ///     println!("{}", meta.st_ino());
    ///     Ok(())
    /// }
    /// ```
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_ino(&self) -> u64;
    /// Returns the file type and mode.
    ///
    /// # Examples
    ///
    /// ```no_run
    /// use std::fs;
    /// use std::io;
    /// use std::os::linux::fs::MetadataExt;
    ///
    /// fn main() -> io::Result<()> {
    ///     let meta = fs::metadata("some_file")?;
    ///     println!("{}", meta.st_mode());
    ///     Ok(())
    /// }
    /// ```
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_mode(&self) -> u32;
    /// Returns the number of hard links to file.
    ///
    /// # Examples
    ///
    /// ```no_run
    /// use std::fs;
    /// use std::io;
    /// use std::os::linux::fs::MetadataExt;
    ///
    /// fn main() -> io::Result<()> {
    ///     let meta = fs::metadata("some_file")?;
    ///     println!("{}", meta.st_nlink());
    ///     Ok(())
    /// }
    /// ```
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_nlink(&self) -> u64;
    /// Returns the user ID of the file owner.
    ///
    /// # Examples
    ///
    /// ```no_run
    /// use std::fs;
    /// use std::io;
    /// use std::os::linux::fs::MetadataExt;
    ///
    /// fn main() -> io::Result<()> {
    ///     let meta = fs::metadata("some_file")?;
    ///     println!("{}", meta.st_uid());
    ///     Ok(())
    /// }
    /// ```
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_uid(&self) -> u32;
    /// Returns the group ID of the file owner.
    ///
    /// # Examples
    ///
    /// ```no_run
    /// use std::fs;
    /// use std::io;
    /// use std::os::linux::fs::MetadataExt;
    ///
    /// fn main() -> io::Result<()> {
    ///     let meta = fs::metadata("some_file")?;
    ///     println!("{}", meta.st_gid());
    ///     Ok(())
    /// }
    /// ```
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_gid(&self) -> u32;
    /// Returns the device ID that this file represents. Only relevant for special file.
    ///
    /// # Examples
    ///
    /// ```no_run
    /// use std::fs;
    /// use std::io;
    /// use std::os::linux::fs::MetadataExt;
    ///
    /// fn main() -> io::Result<()> {
    ///     let meta = fs::metadata("some_file")?;
    ///     println!("{}", meta.st_rdev());
    ///     Ok(())
    /// }
    /// ```
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_rdev(&self) -> u64;
    /// Returns the size of the file (if it is a regular file or a symbolic link) in bytes.
    ///
    /// The size of a symbolic link is the length of the pathname it contains,
    /// without a terminating null byte.
    ///
    /// # Examples
    ///
    /// ```no_run
    /// use std::fs;
    /// use std::io;
    /// use std::os::linux::fs::MetadataExt;
    ///
    /// fn main() -> io::Result<()> {
    ///     let meta = fs::metadata("some_file")?;
    ///     println!("{}", meta.st_size());
    ///     Ok(())
    /// }
    /// ```
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_size(&self) -> u64;
    /// Returns the last access time.
    ///
    /// # Examples
    ///
    /// ```no_run
    /// use std::fs;
    /// use std::io;
    /// use std::os::linux::fs::MetadataExt;
    ///
    /// fn main() -> io::Result<()> {
    ///     let meta = fs::metadata("some_file")?;
    ///     println!("{}", meta.st_atime());
    ///     Ok(())
    /// }
    /// ```
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_atime(&self) -> i64;
    /// Returns the last access time, nano seconds part.
    ///
    /// # Examples
    ///
    /// ```no_run
    /// use std::fs;
    /// use std::io;
    /// use std::os::linux::fs::MetadataExt;
    ///
    /// fn main() -> io::Result<()> {
    ///     let meta = fs::metadata("some_file")?;
    ///     println!("{}", meta.st_atime_nsec());
    ///     Ok(())
    /// }
    /// ```
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_atime_nsec(&self) -> i64;
    /// Returns the last modification time.
    ///
    /// # Examples
    ///
    /// ```no_run
    /// use std::fs;
    /// use std::io;
    /// use std::os::linux::fs::MetadataExt;
    ///
    /// fn main() -> io::Result<()> {
    ///     let meta = fs::metadata("some_file")?;
    ///     println!("{}", meta.st_mtime());
    ///     Ok(())
    /// }
    /// ```
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_mtime(&self) -> i64;
    /// Returns the last modification time, nano seconds part.
    ///
    /// # Examples
    ///
    /// ```no_run
    /// use std::fs;
    /// use std::io;
    /// use std::os::linux::fs::MetadataExt;
    ///
    /// fn main() -> io::Result<()> {
    ///     let meta = fs::metadata("some_file")?;
    ///     println!("{}", meta.st_mtime_nsec());
    ///     Ok(())
    /// }
    /// ```
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_mtime_nsec(&self) -> i64;
    /// Returns the last status change time.
    ///
    /// # Examples
    ///
    /// ```no_run
    /// use std::fs;
    /// use std::io;
    /// use std::os::linux::fs::MetadataExt;
    ///
    /// fn main() -> io::Result<()> {
    ///     let meta = fs::metadata("some_file")?;
    ///     println!("{}", meta.st_ctime());
    ///     Ok(())
    /// }
    /// ```
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_ctime(&self) -> i64;
    /// Returns the last status change time, nano seconds part.
    ///
    /// # Examples
    ///
    /// ```no_run
    /// use std::fs;
    /// use std::io;
    /// use std::os::linux::fs::MetadataExt;
    ///
    /// fn main() -> io::Result<()> {
    ///     let meta = fs::metadata("some_file")?;
    ///     println!("{}", meta.st_ctime_nsec());
    ///     Ok(())
    /// }
    /// ```
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_ctime_nsec(&self) -> i64;
    /// Returns the "preferred" blocksize for efficient filesystem I/O.
    ///
    /// # Examples
    ///
    /// ```no_run
    /// use std::fs;
    /// use std::io;
    /// use std::os::linux::fs::MetadataExt;
    ///
    /// fn main() -> io::Result<()> {
    ///     let meta = fs::metadata("some_file")?;
    ///     println!("{}", meta.st_blksize());
    ///     Ok(())
    /// }
    /// ```
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_blksize(&self) -> u64;
    /// Returns the number of blocks allocated to the file, 512-byte units.
    ///
    /// # Examples
    ///
    /// ```no_run
    /// use std::fs;
    /// use std::io;
    /// use std::os::linux::fs::MetadataExt;
    ///
    /// fn main() -> io::Result<()> {
    ///     let meta = fs::metadata("some_file")?;
    ///     println!("{}", meta.st_blocks());
    ///     Ok(())
    /// }
    /// ```
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_blocks(&self) -> u64;
 }
 #[stable(feature = "metadata_ext", since = "1.1.0")]
 impl MetadataExt for Metadata {
    #[allow(deprecated)]
    fn as_raw_stat(&self) -> &raw::stat {
        unsafe {
            &*(self.as_inner().as_inner() as *const libc::stat
                                          as *const raw::stat)
        }
    }
    fn st_dev(&self) -> u64 {
        self.as_inner().as_inner().st_dev as u64
    }
    fn st_ino(&self) -> u64 {
        self.as_inner().as_inner().st_ino as u64
    }
    fn st_mode(&self) -> u32 {
        self.as_inner().as_inner().st_mode as u32
    }
    fn st_nlink(&self) -> u64 {
        self.as_inner().as_inner().st_nlink as u64
    }
    fn st_uid(&self) -> u32 {
        self.as_inner().as_inner().st_uid as u32
    }
    fn st_gid(&self) -> u32 {
        self.as_inner().as_inner().st_gid as u32
    }
    fn st_rdev(&self) -> u64 {
        self.as_inner().as_inner().st_rdev as u64
    }
    fn st_size(&self) -> u64 {
        self.as_inner().as_inner().st_size as u64
    }
    fn st_atime(&self) -> i64 {
        self.as_inner().as_inner().st_atime as i64
    }
    fn st_atime_nsec(&self) -> i64 {
        //self.as_inner().as_inner().st_atime_nsec as i64
        0i64
    }
    fn st_mtime(&self) -> i64 {
        self.as_inner().as_inner().st_mtime as i64
    }
    fn st_mtime_nsec(&self) -> i64 {
        //self.as_inner().as_inner().st_mtime_nsec as i64
        0i64
    }
    fn st_ctime(&self) -> i64 {
        //self.as_inner().as_inner().st_ctime as i64
        0i64
    }
    fn st_ctime_nsec(&self) -> i64 {
        //self.as_inner().as_inner().st_ctime_nsec as i64
        0i64
    }
    fn st_blksize(&self) -> u64 {
        self.as_inner().as_inner().st_blksize as u64
    }
    fn st_blocks(&self) -> u64 {
        self.as_inner().as_inner().st_blocks as u64
    }
 }
--- a/ctr-std/src/os/horizon/mod.rs
+++ b/ctr-std/src/os/horizon/mod.rs
@ -1,16 +0,0 @@
 // Copyright 2015 The Rust Project Developers. See the COPYRIGHT
 // file at the top-level directory of this distribution and at
 // http://rust-lang.org/COPYRIGHT.
 //
 // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
 // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 //! Linux-specific definitions
 #![stable(feature = "raw_ext", since = "1.1.0")]
 pub mod raw;
 pub mod fs;
--- a/ctr-std/src/os/horizon/raw.rs
+++ b/ctr-std/src/os/horizon/raw.rs
@ -1,275 +0,0 @@
 // Copyright 2015 The Rust Project Developers. See the COPYRIGHT
 // file at the top-level directory of this distribution and at
 // http://rust-lang.org/COPYRIGHT.
 //
 // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
 // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 //! Linux-specific raw type definitions
 #![stable(feature = "raw_ext", since = "1.1.0")]
 #![rustc_deprecated(since = "1.8.0",
                    reason = "these type aliases are no longer supported by \
                              the standard library, the `libc` crate on \
                              crates.io should be used instead for the correct \
                              definitions")]
 #![allow(deprecated)]
 #![allow(missing_debug_implementations)]
 use os::raw::c_ulong;
 #[stable(feature = "raw_ext", since = "1.1.0")] pub type dev_t = u64;
 #[stable(feature = "raw_ext", since = "1.1.0")] pub type mode_t = u32;
 #[stable(feature = "pthread_t", since = "1.8.0")]
 pub type pthread_t = c_ulong;
 #[doc(inline)]
 #[stable(feature = "raw_ext", since = "1.1.0")]
 pub use self::arch::{off_t, ino_t, nlink_t, blksize_t, blkcnt_t, stat, time_t};
 #[cfg(any(target_arch = "x86",
          target_arch = "le32",
          target_arch = "powerpc",
          target_arch = "arm",
          target_arch = "asmjs",
          target_arch = "wasm32"))]
 mod arch {
    use os::raw::{c_long, c_short, c_uint};
    #[stable(feature = "raw_ext", since = "1.1.0")] pub type blkcnt_t = u64;
    #[stable(feature = "raw_ext", since = "1.1.0")] pub type blksize_t = u64;
    #[stable(feature = "raw_ext", since = "1.1.0")] pub type ino_t = u64;
    #[stable(feature = "raw_ext", since = "1.1.0")] pub type nlink_t = u64;
    #[stable(feature = "raw_ext", since = "1.1.0")] pub type off_t = u64;
    #[stable(feature = "raw_ext", since = "1.1.0")] pub type time_t = i64;
    #[repr(C)]
    #[derive(Clone)]
    #[stable(feature = "raw_ext", since = "1.1.0")]
    pub struct stat {
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub st_dev: u64,
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub __pad1: c_short,
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub __st_ino: u32,
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub st_mode: u32,
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub st_nlink: u32,
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub st_uid: u32,
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub st_gid: u32,
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub st_rdev: u64,
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub __pad2: c_uint,
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub st_size: i64,
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub st_blksize: i32,
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub st_blocks: i64,
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub st_atime: i32,
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub st_atime_nsec: c_long,
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub st_mtime: i32,
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub st_mtime_nsec: c_long,
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub st_ctime: i32,
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub st_ctime_nsec: c_long,
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub st_ino: u64,
    }
 }
 #[cfg(target_arch = "mips")]
 mod arch {
    use os::raw::{c_long, c_ulong};
    #[cfg(target_env = "musl")]
    #[stable(feature = "raw_ext", since = "1.1.0")] pub type blkcnt_t = i64;
    #[cfg(not(target_env = "musl"))]
    #[stable(feature = "raw_ext", since = "1.1.0")] pub type blkcnt_t = u64;
    #[stable(feature = "raw_ext", since = "1.1.0")] pub type blksize_t = u64;
    #[cfg(target_env = "musl")]
    #[stable(feature = "raw_ext", since = "1.1.0")] pub type ino_t = u64;
    #[cfg(not(target_env = "musl"))]
    #[stable(feature = "raw_ext", since = "1.1.0")] pub type ino_t = u64;
    #[stable(feature = "raw_ext", since = "1.1.0")] pub type nlink_t = u64;
    #[cfg(target_env = "musl")]
    #[stable(feature = "raw_ext", since = "1.1.0")] pub type off_t = u64;
    #[cfg(not(target_env = "musl"))]
    #[stable(feature = "raw_ext", since = "1.1.0")] pub type off_t = u64;
    #[stable(feature = "raw_ext", since = "1.1.0")] pub type time_t = i64;
    #[repr(C)]
    #[derive(Clone)]
    #[stable(feature = "raw_ext", since = "1.1.0")]
    pub struct stat {
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub st_dev: c_ulong,
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub st_pad1: [c_long; 3],
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub st_ino: u64,
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub st_mode: u32,
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub st_nlink: u32,
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub st_uid: u32,
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub st_gid: u32,
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub st_rdev: c_ulong,
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub st_pad2: [c_long; 2],
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub st_size: i64,
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub st_atime: i32,
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub st_atime_nsec: c_long,
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub st_mtime: i32,
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub st_mtime_nsec: c_long,
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub st_ctime: i32,
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub st_ctime_nsec: c_long,
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub st_blksize: i32,
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub st_blocks: i64,
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub st_pad5: [c_long; 14],
    }
 }
 #[cfg(any(target_arch = "mips64",
          target_arch = "s390x",
          target_arch = "sparc64"))]
 mod arch {
    pub use libc::{off_t, ino_t, nlink_t, blksize_t, blkcnt_t, stat, time_t};
 }
 #[cfg(target_arch = "aarch64")]
 mod arch {
    use os::raw::{c_long, c_int};
    #[stable(feature = "raw_ext", since = "1.1.0")] pub type blkcnt_t = u64;
    #[stable(feature = "raw_ext", since = "1.1.0")] pub type blksize_t = u64;
    #[stable(feature = "raw_ext", since = "1.1.0")] pub type ino_t = u64;
    #[stable(feature = "raw_ext", since = "1.1.0")] pub type nlink_t = u64;
    #[stable(feature = "raw_ext", since = "1.1.0")] pub type off_t = u64;
    #[stable(feature = "raw_ext", since = "1.1.0")] pub type time_t = i64;
    #[repr(C)]
    #[derive(Clone)]
    #[stable(feature = "raw_ext", since = "1.1.0")]
    pub struct stat {
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub st_dev: u64,
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub st_ino: u64,
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub st_mode: u32,
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub st_nlink: u32,
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub st_uid: u32,
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub st_gid: u32,
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub st_rdev: u64,
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub __pad1: u64,
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub st_size: i64,
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub st_blksize: i32,
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub __pad2: c_int,
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub st_blocks: i64,
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub st_atime: i64,
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub st_atime_nsec: c_long,
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub st_mtime: i64,
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub st_mtime_nsec: c_long,
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub st_ctime: i64,
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub st_ctime_nsec: c_long,
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub __unused: [c_int; 2],
    }
 }
 #[cfg(any(target_arch = "x86_64", target_arch = "powerpc64"))]
 mod arch {
    use os::raw::{c_long, c_int};
    #[stable(feature = "raw_ext", since = "1.1.0")] pub type blkcnt_t = u64;
    #[stable(feature = "raw_ext", since = "1.1.0")] pub type blksize_t = u64;
    #[stable(feature = "raw_ext", since = "1.1.0")] pub type ino_t = u64;
    #[stable(feature = "raw_ext", since = "1.1.0")] pub type nlink_t = u64;
    #[stable(feature = "raw_ext", since = "1.1.0")] pub type off_t = u64;
    #[stable(feature = "raw_ext", since = "1.1.0")] pub type time_t = i64;
    #[repr(C)]
    #[derive(Clone)]
    #[stable(feature = "raw_ext", since = "1.1.0")]
    pub struct stat {
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub st_dev: u64,
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub st_ino: u64,
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub st_nlink: u64,
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub st_mode: u32,
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub st_uid: u32,
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub st_gid: u32,
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub __pad0: c_int,
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub st_rdev: u64,
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub st_size: i64,
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub st_blksize: i64,
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub st_blocks: i64,
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub st_atime: i64,
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub st_atime_nsec: c_long,
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub st_mtime: i64,
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub st_mtime_nsec: c_long,
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub st_ctime: i64,
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub st_ctime_nsec: c_long,
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub __unused: [c_long; 3],
    }
 }
--- a/ctr-std/src/os/ios/fs.rs
+++ b/ctr-std/src/os/ios/fs.rs
@ -1,156 +0,0 @@
 // Copyright 2016 The Rust Project Developers. See the COPYRIGHT
 // file at the top-level directory of this distribution and at
 // http://rust-lang.org/COPYRIGHT.
 //
 // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
 // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 #![stable(feature = "metadata_ext", since = "1.1.0")]
 use libc;
 use fs::Metadata;
 use sys_common::AsInner;
 #[allow(deprecated)]
 use os::ios::raw;
 /// OS-specific extensions to [`fs::Metadata`].
 ///
 /// [`fs::Metadata`]: ../../../../std/fs/struct.Metadata.html
 #[stable(feature = "metadata_ext", since = "1.1.0")]
 pub trait MetadataExt {
    /// Gain a reference to the underlying `stat` structure which contains
    /// the raw information returned by the OS.
    ///
    /// The contents of the returned `stat` are **not** consistent across
    /// Unix platforms. The `os::unix::fs::MetadataExt` trait contains the
    /// cross-Unix abstractions contained within the raw stat.
    #[stable(feature = "metadata_ext", since = "1.1.0")]
    #[rustc_deprecated(since = "1.8.0",
                       reason = "deprecated in favor of the accessor \
                                 methods of this trait")]
    #[allow(deprecated)]
    fn as_raw_stat(&self) -> &raw::stat;
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_dev(&self) -> u64;
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_ino(&self) -> u64;
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_mode(&self) -> u32;
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_nlink(&self) -> u64;
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_uid(&self) -> u32;
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_gid(&self) -> u32;
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_rdev(&self) -> u64;
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_size(&self) -> u64;
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_atime(&self) -> i64;
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_atime_nsec(&self) -> i64;
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_mtime(&self) -> i64;
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_mtime_nsec(&self) -> i64;
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_ctime(&self) -> i64;
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_ctime_nsec(&self) -> i64;
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_birthtime(&self) -> i64;
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_birthtime_nsec(&self) -> i64;
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_blksize(&self) -> u64;
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_blocks(&self) -> u64;
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_flags(&self) -> u32;
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_gen(&self) -> u32;
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_lspare(&self) -> u32;
 }
 #[stable(feature = "metadata_ext", since = "1.1.0")]
 impl MetadataExt for Metadata {
    #[allow(deprecated)]
    fn as_raw_stat(&self) -> &raw::stat {
        unsafe {
            &*(self.as_inner().as_inner() as *const libc::stat
                                          as *const raw::stat)
        }
    }
    fn st_dev(&self) -> u64 {
        self.as_inner().as_inner().st_dev as u64
    }
    fn st_ino(&self) -> u64 {
        self.as_inner().as_inner().st_ino as u64
    }
    fn st_mode(&self) -> u32 {
        self.as_inner().as_inner().st_mode as u32
    }
    fn st_nlink(&self) -> u64 {
        self.as_inner().as_inner().st_nlink as u64
    }
    fn st_uid(&self) -> u32 {
        self.as_inner().as_inner().st_uid as u32
    }
    fn st_gid(&self) -> u32 {
        self.as_inner().as_inner().st_gid as u32
    }
    fn st_rdev(&self) -> u64 {
        self.as_inner().as_inner().st_rdev as u64
    }
    fn st_size(&self) -> u64 {
        self.as_inner().as_inner().st_size as u64
    }
    fn st_atime(&self) -> i64 {
        self.as_inner().as_inner().st_atime as i64
    }
    fn st_atime_nsec(&self) -> i64 {
        self.as_inner().as_inner().st_atime_nsec as i64
    }
    fn st_mtime(&self) -> i64 {
        self.as_inner().as_inner().st_mtime as i64
    }
    fn st_mtime_nsec(&self) -> i64 {
        self.as_inner().as_inner().st_mtime_nsec as i64
    }
    fn st_ctime(&self) -> i64 {
        self.as_inner().as_inner().st_ctime as i64
    }
    fn st_ctime_nsec(&self) -> i64 {
        self.as_inner().as_inner().st_ctime_nsec as i64
    }
    fn st_birthtime(&self) -> i64 {
        self.as_inner().as_inner().st_birthtime as i64
    }
    fn st_birthtime_nsec(&self) -> i64 {
        self.as_inner().as_inner().st_birthtime_nsec as i64
    }
    fn st_blksize(&self) -> u64 {
        self.as_inner().as_inner().st_blksize as u64
    }
    fn st_blocks(&self) -> u64 {
        self.as_inner().as_inner().st_blocks as u64
    }
    fn st_gen(&self) -> u32 {
        self.as_inner().as_inner().st_gen as u32
    }
    fn st_flags(&self) -> u32 {
        self.as_inner().as_inner().st_flags as u32
    }
    fn st_lspare(&self) -> u32 {
        self.as_inner().as_inner().st_lspare as u32
    }
 }
--- a/ctr-std/src/os/ios/mod.rs
+++ b/ctr-std/src/os/ios/mod.rs
@ -1,16 +0,0 @@
 // Copyright 2015 The Rust Project Developers. See the COPYRIGHT
 // file at the top-level directory of this distribution and at
 // http://rust-lang.org/COPYRIGHT.
 //
 // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
 // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 //! iOS-specific definitions
 #![stable(feature = "raw_ext", since = "1.1.0")]
 pub mod raw;
 pub mod fs;
--- a/ctr-std/src/os/ios/raw.rs
+++ b/ctr-std/src/os/ios/raw.rs
@ -1,83 +0,0 @@
 // Copyright 2015 The Rust Project Developers. See the COPYRIGHT
 // file at the top-level directory of this distribution and at
 // http://rust-lang.org/COPYRIGHT.
 //
 // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
 // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 //! iOS-specific raw type definitions
 #![stable(feature = "raw_ext", since = "1.1.0")]
 #![rustc_deprecated(since = "1.8.0",
                    reason = "these type aliases are no longer supported by \
                              the standard library, the `libc` crate on \
                              crates.io should be used instead for the correct \
                              definitions")]
 #![allow(deprecated)]
 use os::raw::c_long;
 #[stable(feature = "raw_ext", since = "1.1.0")] pub type blkcnt_t = u64;
 #[stable(feature = "raw_ext", since = "1.1.0")] pub type blksize_t = u64;
 #[stable(feature = "raw_ext", since = "1.1.0")] pub type dev_t = u64;
 #[stable(feature = "raw_ext", since = "1.1.0")] pub type ino_t = u64;
 #[stable(feature = "raw_ext", since = "1.1.0")] pub type mode_t = u32;
 #[stable(feature = "raw_ext", since = "1.1.0")] pub type nlink_t = u64;
 #[stable(feature = "raw_ext", since = "1.1.0")] pub type off_t = u64;
 #[stable(feature = "raw_ext", since = "1.1.0")] pub type time_t = i64;
 #[stable(feature = "pthread_t", since = "1.8.0")]
 pub type pthread_t = usize;
 #[repr(C)]
 #[derive(Clone)]
 #[stable(feature = "raw_ext", since = "1.1.0")]
 pub struct stat {
    #[stable(feature = "raw_ext", since = "1.1.0")]
    pub st_dev: i32,
    #[stable(feature = "raw_ext", since = "1.1.0")]
    pub st_mode: u16,
    #[stable(feature = "raw_ext", since = "1.1.0")]
    pub st_nlink: u16,
    #[stable(feature = "raw_ext", since = "1.1.0")]
    pub st_ino: u64,
    #[stable(feature = "raw_ext", since = "1.1.0")]
    pub st_uid: u32,
    #[stable(feature = "raw_ext", since = "1.1.0")]
    pub st_gid: u32,
    #[stable(feature = "raw_ext", since = "1.1.0")]
    pub st_rdev: i32,
    #[stable(feature = "raw_ext", since = "1.1.0")]
    pub st_atime: c_long,
    #[stable(feature = "raw_ext", since = "1.1.0")]
    pub st_atime_nsec: c_long,
    #[stable(feature = "raw_ext", since = "1.1.0")]
    pub st_mtime: c_long,
    #[stable(feature = "raw_ext", since = "1.1.0")]
    pub st_mtime_nsec: c_long,
    #[stable(feature = "raw_ext", since = "1.1.0")]
    pub st_ctime: c_long,
    #[stable(feature = "raw_ext", since = "1.1.0")]
    pub st_ctime_nsec: c_long,
    #[stable(feature = "raw_ext", since = "1.1.0")]
    pub st_birthtime: c_long,
    #[stable(feature = "raw_ext", since = "1.1.0")]
    pub st_birthtime_nsec: c_long,
    #[stable(feature = "raw_ext", since = "1.1.0")]
    pub st_size: i64,
    #[stable(feature = "raw_ext", since = "1.1.0")]
    pub st_blocks: i64,
    #[stable(feature = "raw_ext", since = "1.1.0")]
    pub st_blksize: i32,
    #[stable(feature = "raw_ext", since = "1.1.0")]
    pub st_flags: u32,
    #[stable(feature = "raw_ext", since = "1.1.0")]
    pub st_gen: u32,
    #[stable(feature = "raw_ext", since = "1.1.0")]
    pub st_lspare: i32,
    #[stable(feature = "raw_ext", since = "1.1.0")]
    pub st_qspare: [i64; 2],
 }
--- a/ctr-std/src/os/linux/fs.rs
+++ b/ctr-std/src/os/linux/fs.rs
@ -1,389 +0,0 @@
 // Copyright 2016 The Rust Project Developers. See the COPYRIGHT
 // file at the top-level directory of this distribution and at
 // http://rust-lang.org/COPYRIGHT.
 //
 // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
 // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 #![stable(feature = "metadata_ext", since = "1.1.0")]
 use libc;
 use fs::Metadata;
 use sys_common::AsInner;
 #[allow(deprecated)]
 use os::linux::raw;
 /// OS-specific extensions to [`fs::Metadata`].
 ///
 /// [`fs::Metadata`]: ../../../../std/fs/struct.Metadata.html
 #[stable(feature = "metadata_ext", since = "1.1.0")]
 pub trait MetadataExt {
    /// Gain a reference to the underlying `stat` structure which contains
    /// the raw information returned by the OS.
    ///
    /// The contents of the returned [`stat`] are **not** consistent across
    /// Unix platforms. The `os::unix::fs::MetadataExt` trait contains the
    /// cross-Unix abstractions contained within the raw stat.
    ///
    /// [`stat`]: ../../../../std/os/linux/raw/struct.stat.html
    ///
    /// # Examples
    ///
    /// ```no_run
    /// use std::fs;
    /// use std::io;
    /// use std::os::linux::fs::MetadataExt;
    ///
    /// fn main() -> io::Result<()> {
    ///     let meta = fs::metadata("some_file")?;
    ///     let stat = meta.as_raw_stat();
    ///     Ok(())
    /// }
    /// ```
    #[stable(feature = "metadata_ext", since = "1.1.0")]
    #[rustc_deprecated(since = "1.8.0",
                       reason = "deprecated in favor of the accessor \
                                 methods of this trait")]
    #[allow(deprecated)]
    fn as_raw_stat(&self) -> &raw::stat;
    /// Returns the device ID on which this file resides.
    ///
    /// # Examples
    ///
    /// ```no_run
    /// use std::fs;
    /// use std::io;
    /// use std::os::linux::fs::MetadataExt;
    ///
    /// fn main() -> io::Result<()> {
    ///     let meta = fs::metadata("some_file")?;
    ///     println!("{}", meta.st_dev());
    ///     Ok(())
    /// }
    /// ```
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_dev(&self) -> u64;
    /// Returns the inode number.
    ///
    /// # Examples
    ///
    /// ```no_run
    /// use std::fs;
    /// use std::io;
    /// use std::os::linux::fs::MetadataExt;
    ///
    /// fn main() -> io::Result<()> {
    ///     let meta = fs::metadata("some_file")?;
    ///     println!("{}", meta.st_ino());
    ///     Ok(())
    /// }
    /// ```
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_ino(&self) -> u64;
    /// Returns the file type and mode.
    ///
    /// # Examples
    ///
    /// ```no_run
    /// use std::fs;
    /// use std::io;
    /// use std::os::linux::fs::MetadataExt;
    ///
    /// fn main() -> io::Result<()> {
    ///     let meta = fs::metadata("some_file")?;
    ///     println!("{}", meta.st_mode());
    ///     Ok(())
    /// }
    /// ```
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_mode(&self) -> u32;
    /// Returns the number of hard links to file.
    ///
    /// # Examples
    ///
    /// ```no_run
    /// use std::fs;
    /// use std::io;
    /// use std::os::linux::fs::MetadataExt;
    ///
    /// fn main() -> io::Result<()> {
    ///     let meta = fs::metadata("some_file")?;
    ///     println!("{}", meta.st_nlink());
    ///     Ok(())
    /// }
    /// ```
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_nlink(&self) -> u64;
    /// Returns the user ID of the file owner.
    ///
    /// # Examples
    ///
    /// ```no_run
    /// use std::fs;
    /// use std::io;
    /// use std::os::linux::fs::MetadataExt;
    ///
    /// fn main() -> io::Result<()> {
    ///     let meta = fs::metadata("some_file")?;
    ///     println!("{}", meta.st_uid());
    ///     Ok(())
    /// }
    /// ```
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_uid(&self) -> u32;
    /// Returns the group ID of the file owner.
    ///
    /// # Examples
    ///
    /// ```no_run
    /// use std::fs;
    /// use std::io;
    /// use std::os::linux::fs::MetadataExt;
    ///
    /// fn main() -> io::Result<()> {
    ///     let meta = fs::metadata("some_file")?;
    ///     println!("{}", meta.st_gid());
    ///     Ok(())
    /// }
    /// ```
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_gid(&self) -> u32;
    /// Returns the device ID that this file represents. Only relevant for special file.
    ///
    /// # Examples
    ///
    /// ```no_run
    /// use std::fs;
    /// use std::io;
    /// use std::os::linux::fs::MetadataExt;
    ///
    /// fn main() -> io::Result<()> {
    ///     let meta = fs::metadata("some_file")?;
    ///     println!("{}", meta.st_rdev());
    ///     Ok(())
    /// }
    /// ```
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_rdev(&self) -> u64;
    /// Returns the size of the file (if it is a regular file or a symbolic link) in bytes.
    ///
    /// The size of a symbolic link is the length of the pathname it contains,
    /// without a terminating null byte.
    ///
    /// # Examples
    ///
    /// ```no_run
    /// use std::fs;
    /// use std::io;
    /// use std::os::linux::fs::MetadataExt;
    ///
    /// fn main() -> io::Result<()> {
    ///     let meta = fs::metadata("some_file")?;
    ///     println!("{}", meta.st_size());
    ///     Ok(())
    /// }
    /// ```
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_size(&self) -> u64;
    /// Returns the last access time.
    ///
    /// # Examples
    ///
    /// ```no_run
    /// use std::fs;
    /// use std::io;
    /// use std::os::linux::fs::MetadataExt;
    ///
    /// fn main() -> io::Result<()> {
    ///     let meta = fs::metadata("some_file")?;
    ///     println!("{}", meta.st_atime());
    ///     Ok(())
    /// }
    /// ```
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_atime(&self) -> i64;
    /// Returns the last access time, nano seconds part.
    ///
    /// # Examples
    ///
    /// ```no_run
    /// use std::fs;
    /// use std::io;
    /// use std::os::linux::fs::MetadataExt;
    ///
    /// fn main() -> io::Result<()> {
    ///     let meta = fs::metadata("some_file")?;
    ///     println!("{}", meta.st_atime_nsec());
    ///     Ok(())
    /// }
    /// ```
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_atime_nsec(&self) -> i64;
    /// Returns the last modification time.
    ///
    /// # Examples
    ///
    /// ```no_run
    /// use std::fs;
    /// use std::io;
    /// use std::os::linux::fs::MetadataExt;
    ///
    /// fn main() -> io::Result<()> {
    ///     let meta = fs::metadata("some_file")?;
    ///     println!("{}", meta.st_mtime());
    ///     Ok(())
    /// }
    /// ```
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_mtime(&self) -> i64;
    /// Returns the last modification time, nano seconds part.
    ///
    /// # Examples
    ///
    /// ```no_run
    /// use std::fs;
    /// use std::io;
    /// use std::os::linux::fs::MetadataExt;
    ///
    /// fn main() -> io::Result<()> {
    ///     let meta = fs::metadata("some_file")?;
    ///     println!("{}", meta.st_mtime_nsec());
    ///     Ok(())
    /// }
    /// ```
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_mtime_nsec(&self) -> i64;
    /// Returns the last status change time.
    ///
    /// # Examples
    ///
    /// ```no_run
    /// use std::fs;
    /// use std::io;
    /// use std::os::linux::fs::MetadataExt;
    ///
    /// fn main() -> io::Result<()> {
    ///     let meta = fs::metadata("some_file")?;
    ///     println!("{}", meta.st_ctime());
    ///     Ok(())
    /// }
    /// ```
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_ctime(&self) -> i64;
    /// Returns the last status change time, nano seconds part.
    ///
    /// # Examples
    ///
    /// ```no_run
    /// use std::fs;
    /// use std::io;
    /// use std::os::linux::fs::MetadataExt;
    ///
    /// fn main() -> io::Result<()> {
    ///     let meta = fs::metadata("some_file")?;
    ///     println!("{}", meta.st_ctime_nsec());
    ///     Ok(())
    /// }
    /// ```
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_ctime_nsec(&self) -> i64;
    /// Returns the "preferred" blocksize for efficient filesystem I/O.
    ///
    /// # Examples
    ///
    /// ```no_run
    /// use std::fs;
    /// use std::io;
    /// use std::os::linux::fs::MetadataExt;
    ///
    /// fn main() -> io::Result<()> {
    ///     let meta = fs::metadata("some_file")?;
    ///     println!("{}", meta.st_blksize());
    ///     Ok(())
    /// }
    /// ```
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_blksize(&self) -> u64;
    /// Returns the number of blocks allocated to the file, 512-byte units.
    ///
    /// # Examples
    ///
    /// ```no_run
    /// use std::fs;
    /// use std::io;
    /// use std::os::linux::fs::MetadataExt;
    ///
    /// fn main() -> io::Result<()> {
    ///     let meta = fs::metadata("some_file")?;
    ///     println!("{}", meta.st_blocks());
    ///     Ok(())
    /// }
    /// ```
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_blocks(&self) -> u64;
 }
 #[stable(feature = "metadata_ext", since = "1.1.0")]
 impl MetadataExt for Metadata {
    #[allow(deprecated)]
    fn as_raw_stat(&self) -> &raw::stat {
        unsafe {
            &*(self.as_inner().as_inner() as *const libc::stat64
                                          as *const raw::stat)
        }
    }
    fn st_dev(&self) -> u64 {
        self.as_inner().as_inner().st_dev as u64
    }
    fn st_ino(&self) -> u64 {
        self.as_inner().as_inner().st_ino as u64
    }
    fn st_mode(&self) -> u32 {
        self.as_inner().as_inner().st_mode as u32
    }
    fn st_nlink(&self) -> u64 {
        self.as_inner().as_inner().st_nlink as u64
    }
    fn st_uid(&self) -> u32 {
        self.as_inner().as_inner().st_uid as u32
    }
    fn st_gid(&self) -> u32 {
        self.as_inner().as_inner().st_gid as u32
    }
    fn st_rdev(&self) -> u64 {
        self.as_inner().as_inner().st_rdev as u64
    }
    fn st_size(&self) -> u64 {
        self.as_inner().as_inner().st_size as u64
    }
    fn st_atime(&self) -> i64 {
        self.as_inner().as_inner().st_atime as i64
    }
    fn st_atime_nsec(&self) -> i64 {
        self.as_inner().as_inner().st_atime_nsec as i64
    }
    fn st_mtime(&self) -> i64 {
        self.as_inner().as_inner().st_mtime as i64
    }
    fn st_mtime_nsec(&self) -> i64 {
        self.as_inner().as_inner().st_mtime_nsec as i64
    }
    fn st_ctime(&self) -> i64 {
        self.as_inner().as_inner().st_ctime as i64
    }
    fn st_ctime_nsec(&self) -> i64 {
        self.as_inner().as_inner().st_ctime_nsec as i64
    }
    fn st_blksize(&self) -> u64 {
        self.as_inner().as_inner().st_blksize as u64
    }
    fn st_blocks(&self) -> u64 {
        self.as_inner().as_inner().st_blocks as u64
    }
 }
--- a/ctr-std/src/os/linux/mod.rs
+++ b/ctr-std/src/os/linux/mod.rs
@ -1,16 +0,0 @@
 // Copyright 2015 The Rust Project Developers. See the COPYRIGHT
 // file at the top-level directory of this distribution and at
 // http://rust-lang.org/COPYRIGHT.
 //
 // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
 // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 //! Linux-specific definitions
 #![stable(feature = "raw_ext", since = "1.1.0")]
 pub mod raw;
 pub mod fs;
--- a/ctr-std/src/os/linux/raw.rs
+++ b/ctr-std/src/os/linux/raw.rs
@ -1,275 +0,0 @@
 // Copyright 2015 The Rust Project Developers. See the COPYRIGHT
 // file at the top-level directory of this distribution and at
 // http://rust-lang.org/COPYRIGHT.
 //
 // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
 // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 //! Linux-specific raw type definitions
 #![stable(feature = "raw_ext", since = "1.1.0")]
 #![rustc_deprecated(since = "1.8.0",
                    reason = "these type aliases are no longer supported by \
                              the standard library, the `libc` crate on \
                              crates.io should be used instead for the correct \
                              definitions")]
 #![allow(deprecated)]
 #![allow(missing_debug_implementations)]
 use os::raw::c_ulong;
 #[stable(feature = "raw_ext", since = "1.1.0")] pub type dev_t = u64;
 #[stable(feature = "raw_ext", since = "1.1.0")] pub type mode_t = u32;
 #[stable(feature = "pthread_t", since = "1.8.0")]
 pub type pthread_t = c_ulong;
 #[doc(inline)]
 #[stable(feature = "raw_ext", since = "1.1.0")]
 pub use self::arch::{off_t, ino_t, nlink_t, blksize_t, blkcnt_t, stat, time_t};
 #[cfg(any(target_arch = "x86",
          target_arch = "le32",
          target_arch = "powerpc",
          target_arch = "arm",
          target_arch = "asmjs",
          target_arch = "wasm32"))]
 mod arch {
    use os::raw::{c_long, c_short, c_uint};
    #[stable(feature = "raw_ext", since = "1.1.0")] pub type blkcnt_t = u64;
    #[stable(feature = "raw_ext", since = "1.1.0")] pub type blksize_t = u64;
    #[stable(feature = "raw_ext", since = "1.1.0")] pub type ino_t = u64;
    #[stable(feature = "raw_ext", since = "1.1.0")] pub type nlink_t = u64;
    #[stable(feature = "raw_ext", since = "1.1.0")] pub type off_t = u64;
    #[stable(feature = "raw_ext", since = "1.1.0")] pub type time_t = i64;
    #[repr(C)]
    #[derive(Clone)]
    #[stable(feature = "raw_ext", since = "1.1.0")]
    pub struct stat {
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub st_dev: u64,
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub __pad1: c_short,
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub __st_ino: u32,
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub st_mode: u32,
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub st_nlink: u32,
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub st_uid: u32,
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub st_gid: u32,
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub st_rdev: u64,
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub __pad2: c_uint,
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub st_size: i64,
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub st_blksize: i32,
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub st_blocks: i64,
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub st_atime: i32,
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub st_atime_nsec: c_long,
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub st_mtime: i32,
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub st_mtime_nsec: c_long,
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub st_ctime: i32,
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub st_ctime_nsec: c_long,
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub st_ino: u64,
    }
 }
 #[cfg(target_arch = "mips")]
 mod arch {
    use os::raw::{c_long, c_ulong};
    #[cfg(target_env = "musl")]
    #[stable(feature = "raw_ext", since = "1.1.0")] pub type blkcnt_t = i64;
    #[cfg(not(target_env = "musl"))]
    #[stable(feature = "raw_ext", since = "1.1.0")] pub type blkcnt_t = u64;
    #[stable(feature = "raw_ext", since = "1.1.0")] pub type blksize_t = u64;
    #[cfg(target_env = "musl")]
    #[stable(feature = "raw_ext", since = "1.1.0")] pub type ino_t = u64;
    #[cfg(not(target_env = "musl"))]
    #[stable(feature = "raw_ext", since = "1.1.0")] pub type ino_t = u64;
    #[stable(feature = "raw_ext", since = "1.1.0")] pub type nlink_t = u64;
    #[cfg(target_env = "musl")]
    #[stable(feature = "raw_ext", since = "1.1.0")] pub type off_t = u64;
    #[cfg(not(target_env = "musl"))]
    #[stable(feature = "raw_ext", since = "1.1.0")] pub type off_t = u64;
    #[stable(feature = "raw_ext", since = "1.1.0")] pub type time_t = i64;
    #[repr(C)]
    #[derive(Clone)]
    #[stable(feature = "raw_ext", since = "1.1.0")]
    pub struct stat {
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub st_dev: c_ulong,
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub st_pad1: [c_long; 3],
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub st_ino: u64,
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub st_mode: u32,
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub st_nlink: u32,
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub st_uid: u32,
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub st_gid: u32,
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub st_rdev: c_ulong,
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub st_pad2: [c_long; 2],
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub st_size: i64,
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub st_atime: i32,
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub st_atime_nsec: c_long,
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub st_mtime: i32,
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub st_mtime_nsec: c_long,
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub st_ctime: i32,
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub st_ctime_nsec: c_long,
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub st_blksize: i32,
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub st_blocks: i64,
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub st_pad5: [c_long; 14],
    }
 }
 #[cfg(any(target_arch = "mips64",
          target_arch = "s390x",
          target_arch = "sparc64"))]
 mod arch {
    pub use libc::{off_t, ino_t, nlink_t, blksize_t, blkcnt_t, stat, time_t};
 }
 #[cfg(target_arch = "aarch64")]
 mod arch {
    use os::raw::{c_long, c_int};
    #[stable(feature = "raw_ext", since = "1.1.0")] pub type blkcnt_t = u64;
    #[stable(feature = "raw_ext", since = "1.1.0")] pub type blksize_t = u64;
    #[stable(feature = "raw_ext", since = "1.1.0")] pub type ino_t = u64;
    #[stable(feature = "raw_ext", since = "1.1.0")] pub type nlink_t = u64;
    #[stable(feature = "raw_ext", since = "1.1.0")] pub type off_t = u64;
    #[stable(feature = "raw_ext", since = "1.1.0")] pub type time_t = i64;
    #[repr(C)]
    #[derive(Clone)]
    #[stable(feature = "raw_ext", since = "1.1.0")]
    pub struct stat {
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub st_dev: u64,
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub st_ino: u64,
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub st_mode: u32,
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub st_nlink: u32,
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub st_uid: u32,
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub st_gid: u32,
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub st_rdev: u64,
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub __pad1: u64,
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub st_size: i64,
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub st_blksize: i32,
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub __pad2: c_int,
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub st_blocks: i64,
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub st_atime: i64,
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub st_atime_nsec: c_long,
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub st_mtime: i64,
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub st_mtime_nsec: c_long,
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub st_ctime: i64,
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub st_ctime_nsec: c_long,
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub __unused: [c_int; 2],
    }
 }
 #[cfg(any(target_arch = "x86_64", target_arch = "powerpc64"))]
 mod arch {
    use os::raw::{c_long, c_int};
    #[stable(feature = "raw_ext", since = "1.1.0")] pub type blkcnt_t = u64;
    #[stable(feature = "raw_ext", since = "1.1.0")] pub type blksize_t = u64;
    #[stable(feature = "raw_ext", since = "1.1.0")] pub type ino_t = u64;
    #[stable(feature = "raw_ext", since = "1.1.0")] pub type nlink_t = u64;
    #[stable(feature = "raw_ext", since = "1.1.0")] pub type off_t = u64;
    #[stable(feature = "raw_ext", since = "1.1.0")] pub type time_t = i64;
    #[repr(C)]
    #[derive(Clone)]
    #[stable(feature = "raw_ext", since = "1.1.0")]
    pub struct stat {
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub st_dev: u64,
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub st_ino: u64,
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub st_nlink: u64,
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub st_mode: u32,
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub st_uid: u32,
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub st_gid: u32,
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub __pad0: c_int,
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub st_rdev: u64,
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub st_size: i64,
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub st_blksize: i64,
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub st_blocks: i64,
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub st_atime: i64,
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub st_atime_nsec: c_long,
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub st_mtime: i64,
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub st_mtime_nsec: c_long,
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub st_ctime: i64,
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub st_ctime_nsec: c_long,
        #[stable(feature = "raw_ext", since = "1.1.0")]
        pub __unused: [c_long; 3],
    }
 }
--- a/ctr-std/src/os/macos/fs.rs
+++ b/ctr-std/src/os/macos/fs.rs
@ -1,162 +0,0 @@
 // Copyright 2016 The Rust Project Developers. See the COPYRIGHT
 // file at the top-level directory of this distribution and at
 // http://rust-lang.org/COPYRIGHT.
 //
 // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
 // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 #![stable(feature = "metadata_ext", since = "1.1.0")]
 use libc;
 use fs::Metadata;
 use sys_common::AsInner;
 #[allow(deprecated)]
 use os::macos::raw;
 /// OS-specific extensions to [`fs::Metadata`].
 ///
 /// [`fs::Metadata`]: ../../../../std/fs/struct.Metadata.html
 #[stable(feature = "metadata_ext", since = "1.1.0")]
 pub trait MetadataExt {
    /// Gain a reference to the underlying `stat` structure which contains
    /// the raw information returned by the OS.
    ///
    /// The contents of the returned `stat` are **not** consistent across
    /// Unix platforms. The `os::unix::fs::MetadataExt` trait contains the
    /// cross-Unix abstractions contained within the raw stat.
    #[stable(feature = "metadata_ext", since = "1.1.0")]
    #[rustc_deprecated(since = "1.8.0",
                       reason = "deprecated in favor of the accessor \
                                 methods of this trait")]
    #[allow(deprecated)]
    fn as_raw_stat(&self) -> &raw::stat;
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_dev(&self) -> u64;
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_ino(&self) -> u64;
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_mode(&self) -> u32;
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_nlink(&self) -> u64;
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_uid(&self) -> u32;
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_gid(&self) -> u32;
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_rdev(&self) -> u64;
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_size(&self) -> u64;
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_atime(&self) -> i64;
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_atime_nsec(&self) -> i64;
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_mtime(&self) -> i64;
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_mtime_nsec(&self) -> i64;
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_ctime(&self) -> i64;
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_ctime_nsec(&self) -> i64;
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_birthtime(&self) -> i64;
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_birthtime_nsec(&self) -> i64;
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_blksize(&self) -> u64;
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_blocks(&self) -> u64;
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_flags(&self) -> u32;
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_gen(&self) -> u32;
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_lspare(&self) -> u32;
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_qspare(&self) -> [u64; 2];
 }
 #[stable(feature = "metadata_ext", since = "1.1.0")]
 impl MetadataExt for Metadata {
    #[allow(deprecated)]
    fn as_raw_stat(&self) -> &raw::stat {
        unsafe {
            &*(self.as_inner().as_inner() as *const libc::stat
                                          as *const raw::stat)
        }
    }
    fn st_dev(&self) -> u64 {
        self.as_inner().as_inner().st_dev as u64
    }
    fn st_ino(&self) -> u64 {
        self.as_inner().as_inner().st_ino as u64
    }
    fn st_mode(&self) -> u32 {
        self.as_inner().as_inner().st_mode as u32
    }
    fn st_nlink(&self) -> u64 {
        self.as_inner().as_inner().st_nlink as u64
    }
    fn st_uid(&self) -> u32 {
        self.as_inner().as_inner().st_uid as u32
    }
    fn st_gid(&self) -> u32 {
        self.as_inner().as_inner().st_gid as u32
    }
    fn st_rdev(&self) -> u64 {
        self.as_inner().as_inner().st_rdev as u64
    }
    fn st_size(&self) -> u64 {
        self.as_inner().as_inner().st_size as u64
    }
    fn st_atime(&self) -> i64 {
        self.as_inner().as_inner().st_atime as i64
    }
    fn st_atime_nsec(&self) -> i64 {
        self.as_inner().as_inner().st_atime_nsec as i64
    }
    fn st_mtime(&self) -> i64 {
        self.as_inner().as_inner().st_mtime as i64
    }
    fn st_mtime_nsec(&self) -> i64 {
        self.as_inner().as_inner().st_mtime_nsec as i64
    }
    fn st_ctime(&self) -> i64 {
        self.as_inner().as_inner().st_ctime as i64
    }
    fn st_ctime_nsec(&self) -> i64 {
        self.as_inner().as_inner().st_ctime_nsec as i64
    }
    fn st_birthtime(&self) -> i64 {
        self.as_inner().as_inner().st_birthtime as i64
    }
    fn st_birthtime_nsec(&self) -> i64 {
        self.as_inner().as_inner().st_birthtime_nsec as i64
    }
    fn st_blksize(&self) -> u64 {
        self.as_inner().as_inner().st_blksize as u64
    }
    fn st_blocks(&self) -> u64 {
        self.as_inner().as_inner().st_blocks as u64
    }
    fn st_gen(&self) -> u32 {
        self.as_inner().as_inner().st_gen as u32
    }
    fn st_flags(&self) -> u32 {
        self.as_inner().as_inner().st_flags as u32
    }
    fn st_lspare(&self) -> u32 {
        self.as_inner().as_inner().st_lspare as u32
    }
    fn st_qspare(&self) -> [u64; 2] {
        let qspare = self.as_inner().as_inner().st_qspare;
        [qspare[0] as u64, qspare[1] as u64]
    }
 }
--- a/ctr-std/src/os/macos/mod.rs
+++ b/ctr-std/src/os/macos/mod.rs
@ -1,16 +0,0 @@
 // Copyright 2015 The Rust Project Developers. See the COPYRIGHT
 // file at the top-level directory of this distribution and at
 // http://rust-lang.org/COPYRIGHT.
 //
 // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
 // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 //! macOS-specific definitions
 #![stable(feature = "raw_ext", since = "1.1.0")]
 pub mod raw;
 pub mod fs;
--- a/ctr-std/src/os/macos/raw.rs
+++ b/ctr-std/src/os/macos/raw.rs
@ -1,83 +0,0 @@
 // Copyright 2015 The Rust Project Developers. See the COPYRIGHT
 // file at the top-level directory of this distribution and at
 // http://rust-lang.org/COPYRIGHT.
 //
 // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
 // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 //! macOS-specific raw type definitions
 #![stable(feature = "raw_ext", since = "1.1.0")]
 #![rustc_deprecated(since = "1.8.0",
                    reason = "these type aliases are no longer supported by \
                              the standard library, the `libc` crate on \
                              crates.io should be used instead for the correct \
                              definitions")]
 #![allow(deprecated)]
 use os::raw::c_long;
 #[stable(feature = "raw_ext", since = "1.1.0")] pub type blkcnt_t = u64;
 #[stable(feature = "raw_ext", since = "1.1.0")] pub type blksize_t = u64;
 #[stable(feature = "raw_ext", since = "1.1.0")] pub type dev_t = u64;
 #[stable(feature = "raw_ext", since = "1.1.0")] pub type ino_t = u64;
 #[stable(feature = "raw_ext", since = "1.1.0")] pub type mode_t = u32;
 #[stable(feature = "raw_ext", since = "1.1.0")] pub type nlink_t = u64;
 #[stable(feature = "raw_ext", since = "1.1.0")] pub type off_t = u64;
 #[stable(feature = "raw_ext", since = "1.1.0")] pub type time_t = i64;
 #[stable(feature = "pthread_t", since = "1.8.0")]
 pub type pthread_t = usize;
 #[repr(C)]
 #[derive(Clone)]
 #[stable(feature = "raw_ext", since = "1.1.0")]
 pub struct stat {
    #[stable(feature = "raw_ext", since = "1.1.0")]
    pub st_dev: i32,
    #[stable(feature = "raw_ext", since = "1.1.0")]
    pub st_mode: u16,
    #[stable(feature = "raw_ext", since = "1.1.0")]
    pub st_nlink: u16,
    #[stable(feature = "raw_ext", since = "1.1.0")]
    pub st_ino: u64,
    #[stable(feature = "raw_ext", since = "1.1.0")]
    pub st_uid: u32,
    #[stable(feature = "raw_ext", since = "1.1.0")]
    pub st_gid: u32,
    #[stable(feature = "raw_ext", since = "1.1.0")]
    pub st_rdev: i32,
    #[stable(feature = "raw_ext", since = "1.1.0")]
    pub st_atime: c_long,
    #[stable(feature = "raw_ext", since = "1.1.0")]
    pub st_atime_nsec: c_long,
    #[stable(feature = "raw_ext", since = "1.1.0")]
    pub st_mtime: c_long,
    #[stable(feature = "raw_ext", since = "1.1.0")]
    pub st_mtime_nsec: c_long,
    #[stable(feature = "raw_ext", since = "1.1.0")]
    pub st_ctime: c_long,
    #[stable(feature = "raw_ext", since = "1.1.0")]
    pub st_ctime_nsec: c_long,
    #[stable(feature = "raw_ext", since = "1.1.0")]
    pub st_birthtime: c_long,
    #[stable(feature = "raw_ext", since = "1.1.0")]
    pub st_birthtime_nsec: c_long,
    #[stable(feature = "raw_ext", since = "1.1.0")]
    pub st_size: i64,
    #[stable(feature = "raw_ext", since = "1.1.0")]
    pub st_blocks: i64,
    #[stable(feature = "raw_ext", since = "1.1.0")]
    pub st_blksize: i32,
    #[stable(feature = "raw_ext", since = "1.1.0")]
    pub st_flags: u32,
    #[stable(feature = "raw_ext", since = "1.1.0")]
    pub st_gen: u32,
    #[stable(feature = "raw_ext", since = "1.1.0")]
    pub st_lspare: i32,
    #[stable(feature = "raw_ext", since = "1.1.0")]
    pub st_qspare: [i64; 2],
 }
--- a/ctr-std/src/os/mod.rs
+++ b/ctr-std/src/os/mod.rs
@ -1,67 +0,0 @@
 // Copyright 2012-2015 The Rust Project Developers. See the COPYRIGHT
 // file at the top-level directory of this distribution and at
 // http://rust-lang.org/COPYRIGHT.
 //
 // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
 // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 //! OS-specific functionality.
 #![stable(feature = "os", since = "1.0.0")]
 #![allow(missing_docs, bad_style, missing_debug_implementations)]
 cfg_if! {
    if #[cfg(dox)] {
        // When documenting libstd we want to show unix/windows/linux modules as
        // these are the "main modules" that are used across platforms. This
        // should help show platform-specific functionality in a hopefully
        // cross-platform way in the documentation
        #[stable(feature = "rust1", since = "1.0.0")]
        pub use sys::unix_ext as unix;
        #[stable(feature = "rust1", since = "1.0.0")]
        pub use sys::windows_ext as windows;
        #[doc(cfg(target_os = "linux"))]
        pub mod linux;
    } else {
        // If we're not documenting libstd then we just expose everything as we
        // otherwise would.
        #[cfg(target_os = "android")]    pub mod android;
        #[cfg(target_os = "bitrig")]     pub mod bitrig;
        #[cfg(target_os = "dragonfly")]  pub mod dragonfly;
        #[cfg(target_os = "freebsd")]    pub mod freebsd;
        #[cfg(target_os = "haiku")]      pub mod haiku;
        #[cfg(target_os = "ios")]        pub mod ios;
        #[cfg(target_os = "macos")]      pub mod macos;
        #[cfg(target_os = "netbsd")]     pub mod netbsd;
        #[cfg(target_os = "openbsd")]    pub mod openbsd;
        #[cfg(target_os = "solaris")]    pub mod solaris;
        #[cfg(target_os = "emscripten")] pub mod emscripten;
        #[cfg(target_os = "fuchsia")]    pub mod fuchsia;
        #[cfg(target_os = "hermit")]     pub mod hermit;
        #[cfg(target_os = "horizon")]    pub mod horizon;
        #[cfg(any(target_os = "redox", unix))]
        #[stable(feature = "rust1", since = "1.0.0")]
        pub use sys::ext as unix;
        #[cfg(windows)]
        #[stable(feature = "rust1", since = "1.0.0")]
        pub use sys::ext as windows;
        #[cfg(any(target_os = "linux", target_os = "l4re"))]
        pub mod linux;
    }
 }
 pub mod raw;
--- a/ctr-std/src/os/netbsd/fs.rs
+++ b/ctr-std/src/os/netbsd/fs.rs
@ -1,151 +0,0 @@
 // Copyright 2016 The Rust Project Developers. See the COPYRIGHT
 // file at the top-level directory of this distribution and at
 // http://rust-lang.org/COPYRIGHT.
 //
 // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
 // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 #![stable(feature = "metadata_ext", since = "1.1.0")]
 use libc;
 use fs::Metadata;
 use sys_common::AsInner;
 #[allow(deprecated)]
 use os::netbsd::raw;
 /// OS-specific extensions to [`fs::Metadata`].
 ///
 /// [`fs::Metadata`]: ../../../../std/fs/struct.Metadata.html
 #[stable(feature = "metadata_ext", since = "1.1.0")]
 pub trait MetadataExt {
    /// Gain a reference to the underlying `stat` structure which contains
    /// the raw information returned by the OS.
    ///
    /// The contents of the returned `stat` are **not** consistent across
    /// Unix platforms. The `os::unix::fs::MetadataExt` trait contains the
    /// cross-Unix abstractions contained within the raw stat.
    #[stable(feature = "metadata_ext", since = "1.1.0")]
    #[rustc_deprecated(since = "1.8.0",
                       reason = "deprecated in favor of the accessor \
                                 methods of this trait")]
    #[allow(deprecated)]
    fn as_raw_stat(&self) -> &raw::stat;
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_dev(&self) -> u64;
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_ino(&self) -> u64;
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_mode(&self) -> u32;
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_nlink(&self) -> u64;
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_uid(&self) -> u32;
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_gid(&self) -> u32;
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_rdev(&self) -> u64;
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_size(&self) -> u64;
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_atime(&self) -> i64;
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_atime_nsec(&self) -> i64;
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_mtime(&self) -> i64;
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_mtime_nsec(&self) -> i64;
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_ctime(&self) -> i64;
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_ctime_nsec(&self) -> i64;
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_birthtime(&self) -> i64;
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_birthtime_nsec(&self) -> i64;
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_blksize(&self) -> u64;
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_blocks(&self) -> u64;
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_flags(&self) -> u32;
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_gen(&self) -> u32;
 }
 #[stable(feature = "metadata_ext", since = "1.1.0")]
 impl MetadataExt for Metadata {
    #[allow(deprecated)]
    fn as_raw_stat(&self) -> &raw::stat {
        unsafe {
            &*(self.as_inner().as_inner() as *const libc::stat
                                          as *const raw::stat)
        }
    }
    fn st_dev(&self) -> u64 {
        self.as_inner().as_inner().st_dev as u64
    }
    fn st_ino(&self) -> u64 {
        self.as_inner().as_inner().st_ino as u64
    }
    fn st_mode(&self) -> u32 {
        self.as_inner().as_inner().st_mode as u32
    }
    fn st_nlink(&self) -> u64 {
        self.as_inner().as_inner().st_nlink as u64
    }
    fn st_uid(&self) -> u32 {
        self.as_inner().as_inner().st_uid as u32
    }
    fn st_gid(&self) -> u32 {
        self.as_inner().as_inner().st_gid as u32
    }
    fn st_rdev(&self) -> u64 {
        self.as_inner().as_inner().st_rdev as u64
    }
    fn st_size(&self) -> u64 {
        self.as_inner().as_inner().st_size as u64
    }
    fn st_atime(&self) -> i64 {
        self.as_inner().as_inner().st_atime as i64
    }
    fn st_atime_nsec(&self) -> i64 {
        self.as_inner().as_inner().st_atimensec as i64
    }
    fn st_mtime(&self) -> i64 {
        self.as_inner().as_inner().st_mtime as i64
    }
    fn st_mtime_nsec(&self) -> i64 {
        self.as_inner().as_inner().st_mtimensec as i64
    }
    fn st_ctime(&self) -> i64 {
        self.as_inner().as_inner().st_ctime as i64
    }
    fn st_ctime_nsec(&self) -> i64 {
        self.as_inner().as_inner().st_ctimensec as i64
    }
    fn st_birthtime(&self) -> i64 {
        self.as_inner().as_inner().st_birthtime as i64
    }
    fn st_birthtime_nsec(&self) -> i64 {
        self.as_inner().as_inner().st_birthtimensec as i64
    }
    fn st_blksize(&self) -> u64 {
        self.as_inner().as_inner().st_blksize as u64
    }
    fn st_blocks(&self) -> u64 {
        self.as_inner().as_inner().st_blocks as u64
    }
    fn st_gen(&self) -> u32 {
        self.as_inner().as_inner().st_gen as u32
    }
    fn st_flags(&self) -> u32 {
        self.as_inner().as_inner().st_flags as u32
    }
 }
--- a/ctr-std/src/os/netbsd/mod.rs
+++ b/ctr-std/src/os/netbsd/mod.rs
@ -1,16 +0,0 @@
 // Copyright 2015 The Rust Project Developers. See the COPYRIGHT
 // file at the top-level directory of this distribution and at
 // http://rust-lang.org/COPYRIGHT.
 //
 // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
 // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 //! OpenBSD-specific definitions
 #![stable(feature = "raw_ext", since = "1.1.0")]
 pub mod raw;
 pub mod fs;
--- a/ctr-std/src/os/netbsd/raw.rs
+++ b/ctr-std/src/os/netbsd/raw.rs
@ -1,82 +0,0 @@
 // Copyright 2015 The Rust Project Developers. See the COPYRIGHT
 // file at the top-level directory of this distribution and at
 // http://rust-lang.org/COPYRIGHT.
 //
 // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
 // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 //! NetBSD-specific raw type definitions
 #![stable(feature = "raw_ext", since = "1.1.0")]
 #![rustc_deprecated(since = "1.8.0",
                    reason = "these type aliases are no longer supported by \
                              the standard library, the `libc` crate on \
                              crates.io should be used instead for the correct \
                              definitions")]
 #![allow(deprecated)]
 use os::raw::c_long;
 use os::unix::raw::{uid_t, gid_t};
 #[stable(feature = "raw_ext", since = "1.1.0")] pub type blkcnt_t = u64;
 #[stable(feature = "raw_ext", since = "1.1.0")] pub type blksize_t = u64;
 #[stable(feature = "raw_ext", since = "1.1.0")] pub type dev_t = u64;
 #[stable(feature = "raw_ext", since = "1.1.0")] pub type fflags_t = u32;
 #[stable(feature = "raw_ext", since = "1.1.0")] pub type ino_t = u64;
 #[stable(feature = "raw_ext", since = "1.1.0")] pub type mode_t = u32;
 #[stable(feature = "raw_ext", since = "1.1.0")] pub type nlink_t = u64;
 #[stable(feature = "raw_ext", since = "1.1.0")] pub type off_t = u64;
 #[stable(feature = "raw_ext", since = "1.1.0")] pub type time_t = i64;
 #[stable(feature = "pthread_t", since = "1.8.0")]
 pub type pthread_t = usize;
 #[repr(C)]
 #[derive(Clone)]
 #[stable(feature = "raw_ext", since = "1.1.0")]
 pub struct stat {
    #[stable(feature = "raw_ext", since = "1.1.0")]
    pub st_dev: u64,
    #[stable(feature = "raw_ext", since = "1.1.0")]
    pub st_mode: u32,
    #[stable(feature = "raw_ext", since = "1.1.0")]
    pub st_ino: u64,
    #[stable(feature = "raw_ext", since = "1.1.0")]
    pub st_nlink: u32,
    #[stable(feature = "raw_ext", since = "1.1.0")]
    pub st_uid: uid_t,
    #[stable(feature = "raw_ext", since = "1.1.0")]
    pub st_gid: gid_t,
    #[stable(feature = "raw_ext", since = "1.1.0")]
    pub st_rdev: u64,
    #[stable(feature = "raw_ext", since = "1.1.0")]
    pub st_atime: i64,
    #[stable(feature = "raw_ext", since = "1.1.0")]
    pub st_atime_nsec: c_long,
    #[stable(feature = "raw_ext", since = "1.1.0")]
    pub st_mtime: i64,
    #[stable(feature = "raw_ext", since = "1.1.0")]
    pub st_mtime_nsec: c_long,
    #[stable(feature = "raw_ext", since = "1.1.0")]
    pub st_ctime: i64,
    #[stable(feature = "raw_ext", since = "1.1.0")]
    pub st_ctime_nsec: c_long,
    #[stable(feature = "raw_ext", since = "1.1.0")]
    pub st_birthtime: i64,
    #[stable(feature = "raw_ext", since = "1.1.0")]
    pub st_birthtime_nsec: c_long,
    #[stable(feature = "raw_ext", since = "1.1.0")]
    pub st_size: i64,
    #[stable(feature = "raw_ext", since = "1.1.0")]
    pub st_blocks: i64,
    #[stable(feature = "raw_ext", since = "1.1.0")]
    pub st_blksize: i32,
    #[stable(feature = "raw_ext", since = "1.1.0")]
    pub st_flags: u32,
    #[stable(feature = "raw_ext", since = "1.1.0")]
    pub st_gen: u32,
    st_spare: [u32; 2],
 }
--- a/ctr-std/src/os/openbsd/fs.rs
+++ b/ctr-std/src/os/openbsd/fs.rs
@ -1,151 +0,0 @@
 // Copyright 2016 The Rust Project Developers. See the COPYRIGHT
 // file at the top-level directory of this distribution and at
 // http://rust-lang.org/COPYRIGHT.
 //
 // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
 // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 #![stable(feature = "metadata_ext", since = "1.1.0")]
 use libc;
 use fs::Metadata;
 use sys_common::AsInner;
 #[allow(deprecated)]
 use os::openbsd::raw;
 /// OS-specific extensions to [`fs::Metadata`].
 ///
 /// [`fs::Metadata`]: ../../../../std/fs/struct.Metadata.html
 #[stable(feature = "metadata_ext", since = "1.1.0")]
 pub trait MetadataExt {
    /// Gain a reference to the underlying `stat` structure which contains
    /// the raw information returned by the OS.
    ///
    /// The contents of the returned `stat` are **not** consistent across
    /// Unix platforms. The `os::unix::fs::MetadataExt` trait contains the
    /// cross-Unix abstractions contained within the raw stat.
    #[stable(feature = "metadata_ext", since = "1.1.0")]
    #[rustc_deprecated(since = "1.8.0",
                       reason = "deprecated in favor of the accessor \
                                 methods of this trait")]
    #[allow(deprecated)]
    fn as_raw_stat(&self) -> &raw::stat;
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_dev(&self) -> u64;
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_ino(&self) -> u64;
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_mode(&self) -> u32;
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_nlink(&self) -> u64;
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_uid(&self) -> u32;
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_gid(&self) -> u32;
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_rdev(&self) -> u64;
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_size(&self) -> u64;
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_atime(&self) -> i64;
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_atime_nsec(&self) -> i64;
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_mtime(&self) -> i64;
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_mtime_nsec(&self) -> i64;
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_ctime(&self) -> i64;
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_ctime_nsec(&self) -> i64;
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_birthtime(&self) -> i64;
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_birthtime_nsec(&self) -> i64;
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_blksize(&self) -> u64;
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_blocks(&self) -> u64;
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_flags(&self) -> u32;
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_gen(&self) -> u32;
 }
 #[stable(feature = "metadata_ext", since = "1.1.0")]
 impl MetadataExt for Metadata {
    #[allow(deprecated)]
    fn as_raw_stat(&self) -> &raw::stat {
        unsafe {
            &*(self.as_inner().as_inner() as *const libc::stat
                                          as *const raw::stat)
        }
    }
    fn st_dev(&self) -> u64 {
        self.as_inner().as_inner().st_dev as u64
    }
    fn st_ino(&self) -> u64 {
        self.as_inner().as_inner().st_ino as u64
    }
    fn st_mode(&self) -> u32 {
        self.as_inner().as_inner().st_mode as u32
    }
    fn st_nlink(&self) -> u64 {
        self.as_inner().as_inner().st_nlink as u64
    }
    fn st_uid(&self) -> u32 {
        self.as_inner().as_inner().st_uid as u32
    }
    fn st_gid(&self) -> u32 {
        self.as_inner().as_inner().st_gid as u32
    }
    fn st_rdev(&self) -> u64 {
        self.as_inner().as_inner().st_rdev as u64
    }
    fn st_size(&self) -> u64 {
        self.as_inner().as_inner().st_size as u64
    }
    fn st_atime(&self) -> i64 {
        self.as_inner().as_inner().st_atime as i64
    }
    fn st_atime_nsec(&self) -> i64 {
        self.as_inner().as_inner().st_atime_nsec as i64
    }
    fn st_mtime(&self) -> i64 {
        self.as_inner().as_inner().st_mtime as i64
    }
    fn st_mtime_nsec(&self) -> i64 {
        self.as_inner().as_inner().st_mtime_nsec as i64
    }
    fn st_ctime(&self) -> i64 {
        self.as_inner().as_inner().st_ctime as i64
    }
    fn st_ctime_nsec(&self) -> i64 {
        self.as_inner().as_inner().st_ctime_nsec as i64
    }
    fn st_birthtime(&self) -> i64 {
        self.as_inner().as_inner().st_birthtime as i64
    }
    fn st_birthtime_nsec(&self) -> i64 {
        self.as_inner().as_inner().st_birthtime_nsec as i64
    }
    fn st_blksize(&self) -> u64 {
        self.as_inner().as_inner().st_blksize as u64
    }
    fn st_blocks(&self) -> u64 {
        self.as_inner().as_inner().st_blocks as u64
    }
    fn st_gen(&self) -> u32 {
        self.as_inner().as_inner().st_gen as u32
    }
    fn st_flags(&self) -> u32 {
        self.as_inner().as_inner().st_flags as u32
    }
 }
--- a/ctr-std/src/os/openbsd/mod.rs
+++ b/ctr-std/src/os/openbsd/mod.rs
@ -1,16 +0,0 @@
 // Copyright 2015 The Rust Project Developers. See the COPYRIGHT
 // file at the top-level directory of this distribution and at
 // http://rust-lang.org/COPYRIGHT.
 //
 // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
 // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 //! OpenBSD-specific definitions
 #![stable(feature = "raw_ext", since = "1.1.0")]
 pub mod raw;
 pub mod fs;
--- a/ctr-std/src/os/openbsd/raw.rs
+++ b/ctr-std/src/os/openbsd/raw.rs
@ -1,80 +0,0 @@
 // Copyright 2015 The Rust Project Developers. See the COPYRIGHT
 // file at the top-level directory of this distribution and at
 // http://rust-lang.org/COPYRIGHT.
 //
 // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
 // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 //! OpenBSD-specific raw type definitions
 #![stable(feature = "raw_ext", since = "1.1.0")]
 #![rustc_deprecated(since = "1.8.0",
                    reason = "these type aliases are no longer supported by \
                              the standard library, the `libc` crate on \
                              crates.io should be used instead for the correct \
                              definitions")]
 #![allow(deprecated)]
 use os::raw::c_long;
 #[stable(feature = "raw_ext", since = "1.1.0")] pub type blkcnt_t = u64;
 #[stable(feature = "raw_ext", since = "1.1.0")] pub type blksize_t = u64;
 #[stable(feature = "raw_ext", since = "1.1.0")] pub type dev_t = u64;
 #[stable(feature = "raw_ext", since = "1.1.0")] pub type fflags_t = u32;
 #[stable(feature = "raw_ext", since = "1.1.0")] pub type ino_t = u64;
 #[stable(feature = "raw_ext", since = "1.1.0")] pub type mode_t = u32;
 #[stable(feature = "raw_ext", since = "1.1.0")] pub type nlink_t = u64;
 #[stable(feature = "raw_ext", since = "1.1.0")] pub type off_t = u64;
 #[stable(feature = "raw_ext", since = "1.1.0")] pub type time_t = i64;
 #[stable(feature = "pthread_t", since = "1.8.0")]
 pub type pthread_t = usize;
 #[repr(C)]
 #[derive(Clone)]
 #[stable(feature = "raw_ext", since = "1.1.0")]
 pub struct stat {
    #[stable(feature = "raw_ext", since = "1.1.0")]
    pub st_mode: u32,
    #[stable(feature = "raw_ext", since = "1.1.0")]
    pub st_dev: i32,
    #[stable(feature = "raw_ext", since = "1.1.0")]
    pub st_ino: u64,
    #[stable(feature = "raw_ext", since = "1.1.0")]
    pub st_nlink: u32,
    #[stable(feature = "raw_ext", since = "1.1.0")]
    pub st_uid: u32,
    #[stable(feature = "raw_ext", since = "1.1.0")]
    pub st_gid: u32,
    #[stable(feature = "raw_ext", since = "1.1.0")]
    pub st_rdev: i32,
    #[stable(feature = "raw_ext", since = "1.1.0")]
    pub st_atime: i64,
    #[stable(feature = "raw_ext", since = "1.1.0")]
    pub st_atime_nsec: c_long,
    #[stable(feature = "raw_ext", since = "1.1.0")]
    pub st_mtime: i64,
    #[stable(feature = "raw_ext", since = "1.1.0")]
    pub st_mtime_nsec: c_long,
    #[stable(feature = "raw_ext", since = "1.1.0")]
    pub st_ctime: i64,
    #[stable(feature = "raw_ext", since = "1.1.0")]
    pub st_ctime_nsec: c_long,
    #[stable(feature = "raw_ext", since = "1.1.0")]
    pub st_size: i64,
    #[stable(feature = "raw_ext", since = "1.1.0")]
    pub st_blocks: i64,
    #[stable(feature = "raw_ext", since = "1.1.0")]
    pub st_blksize: i32,
    #[stable(feature = "raw_ext", since = "1.1.0")]
    pub st_flags: u32,
    #[stable(feature = "raw_ext", since = "1.1.0")]
    pub st_gen: u32,
    #[stable(feature = "raw_ext", since = "1.1.0")]
    pub st_birthtime: i64,
    #[stable(feature = "raw_ext", since = "1.1.0")]
    pub st_birthtime_nsec: c_long,
 }
--- a/ctr-std/src/os/raw/char.md
+++ b/ctr-std/src/os/raw/char.md
@ -1,11 +0,0 @@
 Equivalent to C's `char` type.
 [C's `char` type] is completely unlike [Rust's `char` type]; while Rust's type represents a unicode scalar value, C's `char` type is just an ordinary integer. This type will always be either [`i8`] or [`u8`], as the type is defined as being one byte long.
 C chars are most commonly used to make C strings. Unlike Rust, where the length of a string is included alongside the string, C strings mark the end of a string with the character `'\0'`. See [`CStr`] for more information.
 [C's `char` type]: https://en.wikipedia.org/wiki/C_data_types#Basic_types
 [Rust's `char` type]: ../../primitive.char.html
 [`CStr`]: ../../ffi/struct.CStr.html
 [`i8`]: ../../primitive.i8.html
 [`u8`]: ../../primitive.u8.html
--- a/ctr-std/src/os/raw/double.md
+++ b/ctr-std/src/os/raw/double.md
@ -1,7 +0,0 @@
 Equivalent to C's `double` type.
 This type will almost always be [`f64`], which is guaranteed to be an [IEEE-754 double-precision float] in Rust. That said, the standard technically only guarantees that it be a floating-point number with at least the precision of a [`float`], and it may be `f32` or something entirely different from the IEEE-754 standard.
 [IEEE-754 double-precision float]: https://en.wikipedia.org/wiki/IEEE_754
 [`float`]: type.c_float.html
 [`f64`]: ../../primitive.f64.html
--- a/ctr-std/src/os/raw/float.md
+++ b/ctr-std/src/os/raw/float.md
@ -1,6 +0,0 @@
 Equivalent to C's `float` type.
 This type will almost always be [`f32`], which is guaranteed to be an [IEEE-754 single-precision float] in Rust. That said, the standard technically only guarantees that it be a floating-point number, and it may have less precision than `f32` or not follow the IEEE-754 standard at all.
 [IEEE-754 single-precision float]: https://en.wikipedia.org/wiki/IEEE_754
 [`f32`]: ../../primitive.f32.html
--- a/ctr-std/src/os/raw/int.md
+++ b/ctr-std/src/os/raw/int.md
@ -1,7 +0,0 @@
 Equivalent to C's `signed int` (`int`) type.
 This type will almost always be [`i32`], but may differ on some esoteric systems. The C standard technically only requires that this type be a signed integer that is at least the size of a [`short`]; some systems define it as an [`i16`], for example.
 [`short`]: type.c_short.html
 [`i32`]: ../../primitive.i32.html
 [`i16`]: ../../primitive.i16.html
--- a/ctr-std/src/os/raw/long.md
+++ b/ctr-std/src/os/raw/long.md
@ -1,7 +0,0 @@
 Equivalent to C's `signed long` (`long`) type.
 This type will always be [`i32`] or [`i64`]. Most notably, many Linux-based systems assume an `i64`, but Windows assumes `i32`. The C standard technically only requires that this type be a signed integer that is at least 32 bits and at least the size of an [`int`], although in practice, no system would have a `long` that is neither an `i32` nor `i64`.
 [`int`]: type.c_int.html
 [`i32`]: ../../primitive.i32.html
 [`i64`]: ../../primitive.i64.html
--- a/ctr-std/src/os/raw/longlong.md
+++ b/ctr-std/src/os/raw/longlong.md
@ -1,7 +0,0 @@
 Equivalent to C's `signed long long` (`long long`) type.
 This type will almost always be [`i64`], but may differ on some systems. The C standard technically only requires that this type be a signed integer that is at least 64 bits and at least the size of a [`long`], although in practice, no system would have a `long long` that is not an `i64`, as most systems do not have a standardised [`i128`] type.
 [`long`]: type.c_int.html
 [`i64`]: ../../primitive.i64.html
 [`i128`]: ../../primitive.i128.html
--- a/ctr-std/src/os/raw/mod.rs
+++ b/ctr-std/src/os/raw/mod.rs
@ -1,141 +0,0 @@
 // Copyright 2015 The Rust Project Developers. See the COPYRIGHT
 // file at the top-level directory of this distribution and at
 // http://rust-lang.org/COPYRIGHT.
 //
 // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
 // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 //! Platform-specific types, as defined by C.
 //!
 //! Code that interacts via FFI will almost certainly be using the
 //! base types provided by C, which aren't nearly as nicely defined
 //! as Rust's primitive types. This module provides types which will
 //! match those defined by C, so that code that interacts with C will
 //! refer to the correct types.
 #![stable(feature = "raw_os", since = "1.1.0")]
 use fmt;
 #[doc(include = "os/raw/char.md")]
 #[cfg(any(all(target_os = "linux", any(target_arch = "aarch64",
                                       target_arch = "arm",
                                       target_arch = "powerpc",
                                       target_arch = "powerpc64",
                                       target_arch = "s390x")),
          all(target_os = "android", any(target_arch = "aarch64",
                                         target_arch = "arm")),
          all(target_os = "l4re", target_arch = "x86_64"),
          all(target_os = "netbsd", any(target_arch = "aarch64",
                                        target_arch = "arm",
                                        target_arch = "powerpc")),
          all(target_os = "openbsd", target_arch = "aarch64"),
          all(target_os = "fuchsia", target_arch = "aarch64")))]
 #[stable(feature = "raw_os", since = "1.1.0")] pub type c_char = u8;
 #[doc(include = "os/raw/char.md")]
 #[cfg(not(any(all(target_os = "linux", any(target_arch = "aarch64",
                                           target_arch = "arm",
                                           target_arch = "powerpc",
                                           target_arch = "powerpc64",
                                           target_arch = "s390x")),
              all(target_os = "android", any(target_arch = "aarch64",
                                             target_arch = "arm")),
              all(target_os = "l4re", target_arch = "x86_64"),
              all(target_os = "netbsd", any(target_arch = "aarch64",
                                            target_arch = "arm",
                                            target_arch = "powerpc")),
              all(target_os = "openbsd", target_arch = "aarch64"),
              all(target_os = "fuchsia", target_arch = "aarch64"))))]
 #[stable(feature = "raw_os", since = "1.1.0")] pub type c_char = i8;
 #[doc(include = "os/raw/schar.md")]
 #[stable(feature = "raw_os", since = "1.1.0")] pub type c_schar = i8;
 #[doc(include = "os/raw/uchar.md")]
 #[stable(feature = "raw_os", since = "1.1.0")] pub type c_uchar = u8;
 #[doc(include = "os/raw/short.md")]
 #[stable(feature = "raw_os", since = "1.1.0")] pub type c_short = i16;
 #[doc(include = "os/raw/ushort.md")]
 #[stable(feature = "raw_os", since = "1.1.0")] pub type c_ushort = u16;
 #[doc(include = "os/raw/int.md")]
 #[stable(feature = "raw_os", since = "1.1.0")] pub type c_int = i32;
 #[doc(include = "os/raw/uint.md")]
 #[stable(feature = "raw_os", since = "1.1.0")] pub type c_uint = u32;
 #[doc(include = "os/raw/long.md")]
 #[cfg(any(target_pointer_width = "32", windows))]
 #[stable(feature = "raw_os", since = "1.1.0")] pub type c_long = i32;
 #[doc(include = "os/raw/ulong.md")]
 #[cfg(any(target_pointer_width = "32", windows))]
 #[stable(feature = "raw_os", since = "1.1.0")] pub type c_ulong = u32;
 #[doc(include = "os/raw/long.md")]
 #[cfg(all(target_pointer_width = "64", not(windows)))]
 #[stable(feature = "raw_os", since = "1.1.0")] pub type c_long = i64;
 #[doc(include = "os/raw/ulong.md")]
 #[cfg(all(target_pointer_width = "64", not(windows)))]
 #[stable(feature = "raw_os", since = "1.1.0")] pub type c_ulong = u64;
 #[doc(include = "os/raw/longlong.md")]
 #[stable(feature = "raw_os", since = "1.1.0")] pub type c_longlong = i64;
 #[doc(include = "os/raw/ulonglong.md")]
 #[stable(feature = "raw_os", since = "1.1.0")] pub type c_ulonglong = u64;
 #[doc(include = "os/raw/float.md")]
 #[stable(feature = "raw_os", since = "1.1.0")] pub type c_float = f32;
 #[doc(include = "os/raw/double.md")]
 #[stable(feature = "raw_os", since = "1.1.0")] pub type c_double = f64;
 /// Equivalent to C's `void` type when used as a [pointer].
 ///
 /// In essence, `*const c_void` is equivalent to C's `const void*`
 /// and `*mut c_void` is equivalent to C's `void*`. That said, this is
 /// *not* the same as C's `void` return type, which is Rust's `()` type.
 ///
 /// Ideally, this type would be equivalent to [`!`], but currently it may
 /// be more ideal to use `c_void` for FFI purposes.
 ///
 /// [`!`]: ../../primitive.never.html
 /// [pointer]: ../../primitive.pointer.html
 // NB: For LLVM to recognize the void pointer type and by extension
 //     functions like malloc(), we need to have it represented as i8* in
 //     LLVM bitcode. The enum used here ensures this and prevents misuse
 //     of the "raw" type by only having private variants.. We need two
 //     variants, because the compiler complains about the repr attribute
 //     otherwise.
 #[repr(u8)]
 #[stable(feature = "raw_os", since = "1.1.0")]
 pub enum c_void {
    #[unstable(feature = "c_void_variant", reason = "should not have to exist",
               issue = "0")]
    #[doc(hidden)] __variant1,
    #[unstable(feature = "c_void_variant", reason = "should not have to exist",
               issue = "0")]
    #[doc(hidden)] __variant2,
 }
 #[stable(feature = "std_debug", since = "1.16.0")]
 impl fmt::Debug for c_void {
    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
        f.pad("c_void")
    }
 }
 #[cfg(test)]
 #[allow(unused_imports)]
 mod tests {
    use any::TypeId;
    use libc;
    use mem;
    macro_rules! ok {
        ($($t:ident)*) => {$(
            assert!(TypeId::of::<libc::$t>() == TypeId::of::<raw::$t>(),
                    "{} is wrong", stringify!($t));
        )*}
    }
    #[test]
    fn same() {
        use os::raw;
        ok!(c_char c_schar c_uchar c_short c_ushort c_int c_uint c_long c_ulong
            c_longlong c_ulonglong c_float c_double);
    }
 }
--- a/ctr-std/src/os/raw/schar.md
+++ b/ctr-std/src/os/raw/schar.md
@ -1,6 +0,0 @@
 Equivalent to C's `signed char` type.
 This type will always be [`i8`], but is included for completeness. It is defined as being a signed integer the same size as a C [`char`].
 [`char`]: type.c_char.html
 [`i8`]: ../../primitive.i8.html
--- a/ctr-std/src/os/raw/short.md
+++ b/ctr-std/src/os/raw/short.md
@ -1,6 +0,0 @@
 Equivalent to C's `signed short` (`short`) type.
 This type will almost always be [`i16`], but may differ on some esoteric systems. The C standard technically only requires that this type be a signed integer with at least 16 bits; some systems may define it as `i32`, for example.
 [`char`]: type.c_char.html
 [`i16`]: ../../primitive.i16.html
--- a/ctr-std/src/os/raw/uchar.md
+++ b/ctr-std/src/os/raw/uchar.md
@ -1,6 +0,0 @@
 Equivalent to C's `unsigned char` type.
 This type will always be [`u8`], but is included for completeness. It is defined as being an unsigned integer the same size as a C [`char`].
 [`char`]: type.c_char.html
 [`u8`]: ../../primitive.u8.html
--- a/ctr-std/src/os/raw/uint.md
+++ b/ctr-std/src/os/raw/uint.md
@ -1,7 +0,0 @@
 Equivalent to C's `unsigned int` type.
 This type will almost always be [`u32`], but may differ on some esoteric systems. The C standard technically only requires that this type be an unsigned integer with the same size as an [`int`]; some systems define it as a [`u16`], for example.
 [`int`]: type.c_int.html
 [`u32`]: ../../primitive.u32.html
 [`u16`]: ../../primitive.u16.html
--- a/ctr-std/src/os/raw/ulong.md
+++ b/ctr-std/src/os/raw/ulong.md
@ -1,7 +0,0 @@
 Equivalent to C's `unsigned long` type.
 This type will always be [`u32`] or [`u64`]. Most notably, many Linux-based systems assume an `u64`, but Windows assumes `u32`. The C standard technically only requires that this type be an unsigned integer with the size of a [`long`], although in practice, no system would have a `ulong` that is neither a `u32` nor `u64`.
 [`long`]: type.c_long.html
 [`u32`]: ../../primitive.u32.html
 [`u64`]: ../../primitive.u64.html
--- a/ctr-std/src/os/raw/ulonglong.md
+++ b/ctr-std/src/os/raw/ulonglong.md
@ -1,7 +0,0 @@
 Equivalent to C's `unsigned long long` type.
 This type will almost always be [`u64`], but may differ on some systems. The C standard technically only requires that this type be an unsigned integer with the size of a [`long long`], although in practice, no system would have a `long long` that is not a `u64`, as most systems do not have a standardised [`u128`] type.
 [`long long`]: type.c_longlong.html
 [`u64`]: ../../primitive.u64.html
 [`u128`]: ../../primitive.u128.html
--- a/ctr-std/src/os/raw/ushort.md
+++ b/ctr-std/src/os/raw/ushort.md
@ -1,6 +0,0 @@
 Equivalent to C's `unsigned short` type.
 This type will almost always be [`u16`], but may differ on some esoteric systems. The C standard technically only requires that this type be an unsigned integer with the same size as a [`short`].
 [`short`]: type.c_short.html
 [`u16`]: ../../primitive.u16.html
--- a/ctr-std/src/os/solaris/fs.rs
+++ b/ctr-std/src/os/solaris/fs.rs
@ -1,130 +0,0 @@
 // Copyright 2016 The Rust Project Developers. See the COPYRIGHT
 // file at the top-level directory of this distribution and at
 // http://rust-lang.org/COPYRIGHT.
 //
 // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
 // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 #![stable(feature = "metadata_ext", since = "1.1.0")]
 use libc;
 use fs::Metadata;
 use sys_common::AsInner;
 #[allow(deprecated)]
 use os::solaris::raw;
 /// OS-specific extensions to [`fs::Metadata`].
 ///
 /// [`fs::Metadata`]: ../../../../std/fs/struct.Metadata.html
 #[stable(feature = "metadata_ext", since = "1.1.0")]
 pub trait MetadataExt {
    /// Gain a reference to the underlying `stat` structure which contains
    /// the raw information returned by the OS.
    ///
    /// The contents of the returned `stat` are **not** consistent across
    /// Unix platforms. The `os::unix::fs::MetadataExt` trait contains the
    /// cross-Unix abstractions contained within the raw stat.
    #[stable(feature = "metadata_ext", since = "1.1.0")]
    #[rustc_deprecated(since = "1.8.0",
                       reason = "deprecated in favor of the accessor \
                                 methods of this trait")]
    #[allow(deprecated)]
    fn as_raw_stat(&self) -> &raw::stat;
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_dev(&self) -> u64;
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_ino(&self) -> u64;
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_mode(&self) -> u32;
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_nlink(&self) -> u64;
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_uid(&self) -> u32;
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_gid(&self) -> u32;
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_rdev(&self) -> u64;
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_size(&self) -> u64;
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_atime(&self) -> i64;
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_atime_nsec(&self) -> i64;
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_mtime(&self) -> i64;
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_mtime_nsec(&self) -> i64;
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_ctime(&self) -> i64;
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_ctime_nsec(&self) -> i64;
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_blksize(&self) -> u64;
    #[stable(feature = "metadata_ext2", since = "1.8.0")]
    fn st_blocks(&self) -> u64;
 }
 #[stable(feature = "metadata_ext", since = "1.1.0")]
 impl MetadataExt for Metadata {
    #[allow(deprecated)]
    fn as_raw_stat(&self) -> &raw::stat {
        unsafe {
            &*(self.as_inner().as_inner() as *const libc::stat
                                          as *const raw::stat)
        }
    }
    fn st_dev(&self) -> u64 {
        self.as_inner().as_inner().st_dev as u64
    }
    fn st_ino(&self) -> u64 {
        self.as_inner().as_inner().st_ino as u64
    }
    fn st_mode(&self) -> u32 {
        self.as_inner().as_inner().st_mode as u32
    }
    fn st_nlink(&self) -> u64 {
        self.as_inner().as_inner().st_nlink as u64
    }
    fn st_uid(&self) -> u32 {
        self.as_inner().as_inner().st_uid as u32
    }
    fn st_gid(&self) -> u32 {
        self.as_inner().as_inner().st_gid as u32
    }
    fn st_rdev(&self) -> u64 {
        self.as_inner().as_inner().st_rdev as u64
    }
    fn st_size(&self) -> u64 {
        self.as_inner().as_inner().st_size as u64
    }
    fn st_atime(&self) -> i64 {
        self.as_inner().as_inner().st_atime as i64
    }
    fn st_atime_nsec(&self) -> i64 {
        self.as_inner().as_inner().st_atime_nsec as i64
    }
    fn st_mtime(&self) -> i64 {
        self.as_inner().as_inner().st_mtime as i64
    }
    fn st_mtime_nsec(&self) -> i64 {
        self.as_inner().as_inner().st_mtime_nsec as i64
    }
    fn st_ctime(&self) -> i64 {
        self.as_inner().as_inner().st_ctime as i64
    }
    fn st_ctime_nsec(&self) -> i64 {
        self.as_inner().as_inner().st_ctime_nsec as i64
    }
    fn st_blksize(&self) -> u64 {
        self.as_inner().as_inner().st_blksize as u64
    }
    fn st_blocks(&self) -> u64 {
        self.as_inner().as_inner().st_blocks as u64
    }
 }
--- a/ctr-std/src/os/solaris/mod.rs
+++ b/ctr-std/src/os/solaris/mod.rs
@ -1,16 +0,0 @@
 // Copyright 2015 The Rust Project Developers. See the COPYRIGHT
 // file at the top-level directory of this distribution and at
 // http://rust-lang.org/COPYRIGHT.
 //
 // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
 // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 //! Solaris-specific definitions
 #![stable(feature = "raw_ext", since = "1.1.0")]
 pub mod raw;
 pub mod fs;
--- a/Show More
+++ b/Show More