Bug 1405877 - Update Rust deps for media/audioipc. r=kamidphish

--HG-- rename : third_party/rust/error-chain/src/quick_error.rs => third_party/rust/error-chain/src/impl_error_chain_kind.rs
2024-11-28 15:23:51 +00:00 · 2017-12-20 14:51:11 +13:00 · 2017-12-20 14:51:11 +13:00 · 86594ab667
commit 86594ab667
parent 3d317e6af8
22 changed files with 901 additions and 275 deletions
--- a/third_party/rust/error-chain/.cargo-checksum.json
+++ b/third_party/rust/error-chain/.cargo-checksum.json
@ -1 +1 @@
-{"files":{".travis.yml":"d56246d6c8796c638b5012c2d7a91d9b6ec101b6a47128e2d4bfa957c1c784e8","CHANGELOG.md":"4f602de0b17e0d0121371482dfcf3caf2265b70bf92e8b5db1cba5dd8f391469","Cargo.toml":"8e4d1f0b25be862107a6938190c9817cd7ea516db50e688de1d0fe87519105ee","README.md":"6771ca940645b2f7e7a018c8cd25b25f8bf35786e229b54fa2fded1f2d0ae411","examples/all.rs":"6f073ea0e3db541a4eefb41436fc03a121a1f932fd6a2798b485a72d64bd1a3c","examples/doc.rs":"574948eb776c3d363f5cff9a48015bab6c17828c7306dc3eb8818afa90a31a83","examples/quickstart.rs":"c3142d5139d89c3861b119507a372fba47ac3d7df61aa90b068d518dea8fd6f6","examples/size.rs":"7922acd891dfd06f1d36308a3ccdf03def2646b2f39bfd1b15cf2896247bad8f","src/error_chain.rs":"d0cb3e4a93f9c358e4bd18ab8443573e57ace15442f4697ad95963d10408f882","src/example_generated.rs":"7d5220020aada7def70d3b3e396dadb0b139ed104b1253d06ac53f48517ec668","src/lib.rs":"0d1c972252dd1df3117ddf0a71a4734cdb350b41376e09cbe4b868afb0e2762b","src/quick_error.rs":"1889b9ca1f7a5e9124275fd5da81e709d0d6bd3b06915bf320c23d4c4f083301","src/quick_main.rs":"106a0cf44a6a2fbb9fb1d8932d234f43cd7af230fc6685b28f6b9dfaca2a3210","tests/quick_main.rs":"1d6a726856b954d4cffddab00602583921972ceeeb2bf7ba9ebbac6a51584b53","tests/tests.rs":"67b6acf87f4986fa013f018195e3becd6dd63d8101a7af07a417e8e526cf50ad"},"package":"d9435d864e017c3c6afeac1654189b06cdb491cf2ff73dbf0d73b0f292f42ff8"}
+{"files":{".travis.yml":"6dcf8fe7a4ef9f228cabc1a9179b3084c8be6dd09b9b838dbf4019d113e1bbcf","CHANGELOG.md":"010cba4f5cdf9607eb744e83a666a3642d6c1aae5d467c67978e97a7f7e86bd8","Cargo.toml":"d8d10d260671883629d2b7e6c5daca5eb2b49b8b1c88345e530462ea1a2e6913","LICENSE-APACHE":"a60eea817514531668d7e00765731449fe14d059d3249e0bc93b36de45f759f2","LICENSE-MIT":"c43864d39cedab9a1b2aa3d5e480cb58f74cac0b07756670a30c683ce34976a1","README.md":"d63912fd7a5a1a2b1d21edde3cee58cbe422c29b9fcdcc7b8ba2264bf15825b5","examples/all.rs":"cf8422ea6fdb61dbe9ddbb2db51daba48768e3b1d81c5f9e454371c258954cfb","examples/chain_err.rs":"fbb6f90397d5e621e4982d224caf3d419a3c1aaa50f07e5c9c617a9352cfb81f","examples/doc.rs":"790ad6877c91e4e5b2d78829c58702100dcccf3eac2279940257691420cdff03","examples/quickstart.rs":"ca471b3c310d40e5f5dc07db2bfbfcedb71dfc1e25021a6383a9810b24e8fc40","examples/size.rs":"a67ba47b254fb899cb0ecf809e95f75649bb0e401feece9485a2064e223602ab","src/bin/has_backtrace.rs":"eedf028ff206938760a53e91d13534b6ad6780b2b6635f405b7896125484a869","src/error_chain.rs":"5fc674d965746f3ea1a6ea65f82352c40b83439004480bf5a338748a90e476cc","src/example_generated.rs":"95a1e191917740885286f199186674ed575d807077b57dffe6388a4fe2e1ba98","src/impl_error_chain_kind.rs":"538c6f7a2382d555f809c4d7f33e739dff7aa75b2fb3c1629ca2afaa38ff4279","src/lib.rs":"0adc37e316f45d57d56d76245c76942d2a894643c4d2da744639d33c3cd99099","src/quick_main.rs":"472f0b90b11d346cbceec5a95da78fabda0fb55e7e019dc62ac8ff0c206841ea","tests/quick_main.rs":"39a1113cc0d30e5b265e4139cda36f910f8c534a4409e99a9a506a0e88e58f19","tests/tests.rs":"2b76317571651999c294c639088ec7d764c27721d802ea6bc624cfdf31619623"},"package":"ff511d5dc435d703f4971bc399647c9bc38e20cb41452e3b9feb4765419ed3f3"}
--- a/third_party/rust/error-chain/.travis.yml
+++ b/third_party/rust/error-chain/.travis.yml
@ -5,7 +5,7 @@ rust:
 - nightly
 # Oldest supported version for all features.
 # Use of https://github.com/rust-lang/rfcs/pull/16
- 1.13.0
+- 1.14.0
 # Oldest supported version as dependency, with no features, tests, or examples.
 - 1.10.0
@ -35,6 +35,7 @@ env:
  global:
  - secure: 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
  - TRAVIS_CARGO_NIGHTLY_FEATURE=""
  - RUSTFLAGS="-D warnings"
  matrix:
  - FEATURES=--features=backtrace
  - FEATURES=--no-default-features
--- a/third_party/rust/error-chain/CHANGELOG.md
+++ b/third_party/rust/error-chain/CHANGELOG.md
@ -1,22 +1,42 @@
 # Unreleased
 # 0.11.0
 - Change last rust version supported to 1.14
 - [Cache whether RUST_BACKTRACE is enabled in a relaxed atomic static.](https://github.com/rust-lang-nursery/error-chain/pull/210)
 - [Mask the `quick_error` macro from the doc](https://github.com/rust-lang-nursery/error-chain/pull/210)
 - [Make generated `ErrorKind` enums non-exhaustive](https://github.com/rust-lang-nursery/error-chain/pull/193)
 - All 0.11.0-rc.2 changes
 # 0.11.0-rc.2
 - [Make `ErrorChainIter`'s field private](https://github.com/rust-lang-nursery/error-chain/issues/178)
 - [Rename `ErrorChainIter` to `Iter`](https://github.com/rust-lang-nursery/error-chain/issues/168)
 - [Implement `Debug` for `ErrorChainIter`](https://github.com/rust-lang-nursery/error-chain/issues/169)
 - [Rename `ChainedError::display` to `display_chain`](https://github.com/rust-lang-nursery/error-chain/issues/180)
 - [Add a new method for `Error`: `chain_err`.](https://github.com/rust-lang-nursery/error-chain/pull/141)
 - [Allow `chain_err` to be used on `Option<T>`](https://github.com/rust-lang-nursery/error-chain/pull/156)
 - [Add support for creating an error chain on boxed trait errors (`Box<Error>`)](https://github.com/rust-lang-nursery/error-chain/pull/156)
 - [Remove lint for unused doc comment.](https://github.com/rust-lang-nursery/error-chain/pull/199)
 - [Hide error_chain_processed macro from documentation.](https://github.com/rust-lang-nursery/error-chain/pull/212)
 # 0.10.0
- [Add a new constructor for `Error`: `with_chain`.](https://github.com/brson/error-chain/pull/126)
+- [Add a new constructor for `Error`: `with_chain`.](https://github.com/rust-lang-nursery/error-chain/pull/126)
- [Add the `ensure!` macro.](https://github.com/brson/error-chain/pull/135)
+- [Add the `ensure!` macro.](https://github.com/rust-lang-nursery/error-chain/pull/135)
 # 0.9.0
- Revert [Add a `Sync` bound to errors](https://github.com/brson/error-chain/pull/110)
+- Revert [Add a `Sync` bound to errors](https://github.com/rust-lang-nursery/error-chain/pull/110)
 # 0.8.1
- Add crates.io categorie.
+- Add crates.io category.
 # 0.8.0
- [Add a `Sync` bound to errors](https://github.com/brson/error-chain/pull/110)
+- [Add a `Sync` bound to errors](https://github.com/rust-lang-nursery/error-chain/pull/110)
- [Add `ChainedError::display` to format error chains](https://github.com/brson/error-chain/pull/113)
+- [Add `ChainedError::display` to format error chains](https://github.com/rust-lang-nursery/error-chain/pull/113)
 # 0.7.2
@ -26,11 +46,11 @@
 # 0.7.1
- [Add the `bail!` macro](https://github.com/brson/error-chain/pull/76)
+- [Add the `bail!` macro](https://github.com/rust-lang-nursery/error-chain/pull/76)
 # 0.7.0
- [Rollback several design changes to fix regressions](https://github.com/brson/error-chain/pull/75)
+- [Rollback several design changes to fix regressions](https://github.com/rust-lang-nursery/error-chain/pull/75)
 - New `Variant(Error) #[attrs]` for `links` and `foreign_links`.
 - Hide implementation details from the doc.
 - Always generate `Error::backtrace`.
@ -60,41 +80,41 @@
 # 0.5.0
- [Only generate backtraces with RUST_BACKTRACE set](https://github.com/brson/error-chain/pull/27)
+- [Only generate backtraces with RUST_BACKTRACE set](https://github.com/rust-lang-nursery/error-chain/pull/27)
- [Fixup matching, disallow repeating "types" section](https://github.com/brson/error-chain/pull/26)
+- [Fixup matching, disallow repeating "types" section](https://github.com/rust-lang-nursery/error-chain/pull/26)
- [Fix tests on stable/beta](https://github.com/brson/error-chain/pull/28)
+- [Fix tests on stable/beta](https://github.com/rust-lang-nursery/error-chain/pull/28)
- [Only deploy docs when tagged](https://github.com/brson/error-chain/pull/30)
+- [Only deploy docs when tagged](https://github.com/rust-lang-nursery/error-chain/pull/30)
 Contributors: benaryorg, Brian Anderson, Georg Brandl
 # 0.4.2
- [Fix the resolution of the ErrorKind description method](https://github.com/brson/error-chain/pull/24)
+- [Fix the resolution of the ErrorKind description method](https://github.com/rust-lang-nursery/error-chain/pull/24)
 Contributors: Brian Anderson
 # 0.4.1 (yanked)
- [Fix a problem with resolving methods of the standard Error type](https://github.com/brson/error-chain/pull/22)
+- [Fix a problem with resolving methods of the standard Error type](https://github.com/rust-lang-nursery/error-chain/pull/22)
 Contributors: Brian Anderson
 # 0.4.0 (yanked)
- [Remove the foreign link description and forward to the foreign error](https://github.com/brson/error-chain/pull/19)
+- [Remove the foreign link description and forward to the foreign error](https://github.com/rust-lang-nursery/error-chain/pull/19)
- [Allow missing sections](https://github.com/brson/error-chain/pull/17)
+- [Allow missing sections](https://github.com/rust-lang-nursery/error-chain/pull/17)
 Contributors: Brian Anderson, Taylor Cramer
 # 0.3.0
- [Forward Display implementation for foreign errors](https://github.com/brson/error-chain/pull/13)
+- [Forward Display implementation for foreign errors](https://github.com/rust-lang-nursery/error-chain/pull/13)
 Contributors: Brian Anderson, Taylor Cramer
 # 0.2.2
- [Don't require `types` section in macro invocation](https://github.com/brson/error-chain/pull/8)
+- [Don't require `types` section in macro invocation](https://github.com/rust-lang-nursery/error-chain/pull/8)
- [Add "quick start" to README](https://github.com/brson/error-chain/pull/9)
+- [Add "quick start" to README](https://github.com/rust-lang-nursery/error-chain/pull/9)
 Contributors: Brian Anderson, Jake Shadle, Nate Mara
--- a/third_party/rust/error-chain/Cargo.toml
+++ b/third_party/rust/error-chain/Cargo.toml
@ -1,26 +1,32 @@
 # THIS FILE IS AUTOMATICALLY GENERATED BY CARGO
 #
 # When uploading crates to the registry Cargo will automatically
 # "normalize" Cargo.toml files for maximal compatibility
 # with all versions of Cargo and also rewrite `path` dependencies
 # to registry (e.g. crates.io) dependencies
 #
 # If you believe there's an error in this file please file an
 # issue against the rust-lang/cargo repository. If you're
 # editing this file be aware that the upstream Cargo.toml
 # will likely look very different (and much more reasonable)
 [package]
 name = "error-chain"
-version = "0.10.0"
+version = "0.11.0"
-authors = [ "Brian Anderson <banderson@mozilla.com>",
+authors = ["Brian Anderson <banderson@mozilla.com>", "Paul Colomiets <paul@colomiets.name>", "Colin Kiegel <kiegel@gmx.de>", "Yamakaky <yamakaky@yamaworld.fr>"]
            "Paul Colomiets <paul@colomiets.name>",
            "Colin Kiegel <kiegel@gmx.de>",
            "Yamakaky <yamakaky@yamaworld.fr>"]
 description = "Yet another error boilerplate library."
 categories = ["rust-patterns"]
 documentation = "https://docs.rs/error-chain"
-homepage = "https://github.com/brson/error-chain"
+readme = "README.md"
-repository = "https://github.com/brson/error-chain"
+keywords = ["error"]
-
+categories = ["rust-patterns"]
 license = "MIT/Apache-2.0"
-
+repository = "https://github.com/rust-lang-nursery/error-chain"
-[badges]
+[dependencies.backtrace]
-travis-ci = { repository = "brson/error-chain" }
+version = "0.3"
 optional = true
 [features]
 default = ["backtrace", "example_generated"]
 example_generated = []
-
+default = ["backtrace", "example_generated"]
-[dependencies]
+[badges.travis-ci]
-backtrace = { version = "0.3", optional = true }
+repository = "rust-lang-nursery/error-chain"
--- a/third_party/rust/error-chain/LICENSE-APACHE
+++ b/third_party/rust/error-chain/LICENSE-APACHE
@ -0,0 +1,201 @@
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--- a/third_party/rust/error-chain/LICENSE-MIT
+++ b/third_party/rust/error-chain/LICENSE-MIT
@ -0,0 +1,26 @@
 Copyright (c) 2017 The Error-Chain Project Developers
 Permission is hereby granted, free of charge, to any
 person obtaining a copy of this software and associated
 documentation files (the "Software"), to deal in the
 Software without restriction, including without
 limitation the rights to use, copy, modify, merge,
 publish, distribute, sublicense, and/or sell copies of
 the Software, and to permit persons to whom the Software
 is furnished to do so, subject to the following
 conditions:
 The above copyright notice and this permission notice
 shall be included in all copies or substantial portions
 of the Software.
 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF
 ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED
 TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A
 PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT
 SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
 CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
 OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR
 IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
 DEALINGS IN THE SOFTWARE.
--- a/third_party/rust/error-chain/README.md
+++ b/third_party/rust/error-chain/README.md
@ -1,8 +1,8 @@
 # error-chain - Consistent error handling for Rust
-[![Build Status](https://api.travis-ci.org/brson/error-chain.svg?branch=master)](https://travis-ci.org/brson/error-chain)
+[![Build Status](https://api.travis-ci.org/rust-lang-nursery/error-chain.svg?branch=master)](https://travis-ci.org/rust-lang-nursery/error-chain)
 [![Latest Version](https://img.shields.io/crates/v/error-chain.svg)](https://crates.io/crates/error-chain)
-[![License](https://img.shields.io/github/license/brson/error-chain.svg)](https://github.com/brson/error-chain)
+[![License](https://img.shields.io/github/license/rust-lang-nursery/error-chain.svg)](https://github.com/rust-lang-nursery/error-chain)
 `error-chain` makes it easy to take full advantage of Rust's error
 handling features without the overhead of maintaining boilerplate
@ -12,7 +12,7 @@ error types.
 [Documentation (crates.io)](https://docs.rs/error-chain).
-[Documentation (master)](https://brson.github.io/error-chain).
+[Documentation (master)](https://rust-lang-nursery.github.io/error-chain).
 ## Quick start
@ -20,7 +20,7 @@ If you just want to set up your new project with error-chain,
 follow the [quickstart.rs] template, and read this [intro]
 to error-chain.
-[quickstart.rs]: https://github.com/brson/error-chain/blob/master/examples/quickstart.rs
+[quickstart.rs]: https://github.com/rust-lang-nursery/error-chain/blob/master/examples/quickstart.rs
 [intro]: http://brson.github.io/2016/11/30/starting-with-error-chain
 ## Supported Rust version
--- a/third_party/rust/error-chain/examples/all.rs
+++ b/third_party/rust/error-chain/examples/all.rs
@ -2,12 +2,12 @@
 extern crate error_chain;
 pub mod inner {
-    error_chain! {}
+    error_chain!{}
 }
 #[cfg(feature = "a_feature")]
 pub mod feature {
-    error_chain! {}
+    error_chain!{}
 }
 error_chain! {
--- a/third_party/rust/error-chain/examples/chain_err.rs
+++ b/third_party/rust/error-chain/examples/chain_err.rs
@ -0,0 +1,69 @@
 //! Demonstrates usage of `Error::caused` method. This method enables chaining errors
 //! like `ResultExt::chain_err` but doesn't require the presence of a `Result` wrapper.
 #[macro_use]
 extern crate error_chain;
 use std::fs::File;
 mod errors {
    use std::io;
    use super::LaunchStage;
    error_chain! {
        foreign_links {
            Io(io::Error) #[doc = "Error during IO"];
        }
        errors {
            Launch(phase: LaunchStage) {
                description("An error occurred during startup")
                display("Startup aborted: {:?} did not complete successfully", phase)
            }
            ConfigLoad(path: String) {
                description("Config file not found")
                display("Unable to read file `{}`", path)
            }
        }
    }
    impl From<LaunchStage> for ErrorKind {
        fn from(v: LaunchStage) -> Self {
            ErrorKind::Launch(v)
        }
    }
 }
 pub use errors::*;
 #[derive(Debug, Clone, PartialEq, Eq)]
 pub enum LaunchStage {
    ConfigLoad,
    ConfigParse,
    ConfigResolve,
 }
 /// Read the service config from the file specified.
 fn load_config(rel_path: &str) -> Result<()> {
    File::open(rel_path)
        .map(|_| ())
        .chain_err(|| ErrorKind::ConfigLoad(rel_path.to_string()))
 }
 /// Launch the service.
 fn launch(rel_path: &str) -> Result<()> {
    load_config(rel_path).map_err(|e| match e {
                                      e @ Error(ErrorKind::ConfigLoad(_), _) => {
                                          e.chain_err(|| LaunchStage::ConfigLoad)
                                      }
                                      e => e.chain_err(|| "Unknown failure"),
                                  })
 }
 fn main() {
    let chain = launch("does_not_exist.json").unwrap_err();
    for err in chain.iter() {
        println!("{}", err);
    }
 }
--- a/third_party/rust/error-chain/examples/doc.rs
+++ b/third_party/rust/error-chain/examples/doc.rs
@ -7,8 +7,7 @@ extern crate error_chain;
 /// Inner module.
 pub mod inner {
-    error_chain! {
+    error_chain!{}
    }
 }
 error_chain! {
--- a/third_party/rust/error-chain/examples/quickstart.rs
+++ b/third_party/rust/error-chain/examples/quickstart.rs
@ -14,14 +14,17 @@ extern crate error_chain;
 // `error_chain!` creates.
 mod errors {
    // Create the Error, ErrorKind, ResultExt, and Result types
-    error_chain! { }
+    error_chain!{}
 }
 // This only gives access within this module. Make this `pub use errors::*;`
 // instead if the types must be accessible from other modules (e.g., within
 // a `links` section).
 use errors::*;
 fn main() {
    if let Err(ref e) = run() {
-        use ::std::io::Write;
+        use std::io::Write;
        let stderr = &mut ::std::io::stderr();
        let errmsg = "Error writing to stderr";
@ -43,24 +46,24 @@ fn main() {
 // The above main gives you maximum control over how the error is
 // formatted. If you don't care (i.e. you want to display the full
-// error during an assert) you can just call the `display` method
+// error during an assert) you can just call the `display_chain` method
 // on the error object
 #[allow(dead_code)]
 fn alternative_main() {
    if let Err(ref e) = run() {
        use std::io::Write;
-        use error_chain::ChainedError; // trait which holds `display`
+        use error_chain::ChainedError; // trait which holds `display_chain`
        let stderr = &mut ::std::io::stderr();
        let errmsg = "Error writing to stderr";
-        writeln!(stderr, "{}", e.display()).expect(errmsg);
+        writeln!(stderr, "{}", e.display_chain()).expect(errmsg);
        ::std::process::exit(1);
    }
 }
 // Use this macro to auto-generate the main above. You may want to
 // set the `RUST_BACKTRACE` env variable to see a backtrace.
-//quick_main!(run);
+// quick_main!(run);
 // Most functions will return the `Result` type, imported from the
--- a/third_party/rust/error-chain/examples/size.rs
+++ b/third_party/rust/error-chain/examples/size.rs
@ -32,9 +32,7 @@ fn main() {
    }
    #[cfg(not(feature = "backtrace"))]
    {
-        let state = error_chain::State {
+        let state = error_chain::State { next_error: None };
            next_error: None,
        };
        println!("      State.next_error: {}", size_of_val(&state.next_error));
    }
 }
--- a/third_party/rust/error-chain/src/bin/has_backtrace.rs
+++ b/third_party/rust/error-chain/src/bin/has_backtrace.rs
@ -0,0 +1,18 @@
 //! Exits with exit code 0 if backtraces are disabled and 1 if they are enabled.
 //! Used by tests to make sure backtraces are available when they should be. Should not be used
 //! outside of the tests.
 #[macro_use]
 extern crate error_chain;
 error_chain! {
    errors {
        MyError
    }
 }
 fn main() {
    let err = Error::from(ErrorKind::MyError);
    let has_backtrace = err.backtrace().is_some();
    ::std::process::exit(has_backtrace as i32);
 }
--- a/third_party/rust/error-chain/src/error_chain.rs
+++ b/third_party/rust/error-chain/src/error_chain.rs
@ -1,12 +1,13 @@
 /// Prefer to use `error_chain` instead of this macro.
 #[doc(hidden)]
 #[macro_export]
-macro_rules! error_chain_processed {
+macro_rules! impl_error_chain_processed {
    // Default values for `types`.
    (
        types {}
        $( $rest: tt )*
    ) => {
-        error_chain_processed! {
+        impl_error_chain_processed! {
            types {
                Error, ErrorKind, ResultExt, Result;
            }
@ -21,7 +22,7 @@ macro_rules! error_chain_processed {
        }
        $( $rest: tt )*
    ) => {
-        error_chain_processed! {
+        impl_error_chain_processed! {
            types {
                $error_name, $error_kind_name,
                $result_ext_name;
@ -96,8 +97,14 @@ macro_rules! error_chain_processed {
                self.kind()
            }
-            fn iter(&self) -> $crate::ErrorChainIter {
+            fn iter(&self) -> $crate::Iter {
-                $crate::ErrorChainIter(Some(self))
+                $crate::Iter::new(Some(self))
            }
            fn chain_err<F, EK>(self, error: F) -> Self
                where F: FnOnce() -> EK,
                      EK: Into<$error_kind_name> {
                self.chain_err(error)
            }
            fn backtrace(&self) -> Option<&$crate::Backtrace> {
@ -124,10 +131,18 @@ macro_rules! error_chain_processed {
                -> $error_name
                where E: ::std::error::Error + Send + 'static,
                      K: Into<$error_kind_name>
            {
                $error_name::with_boxed_chain(Box::new(error), kind)
            }
            /// Construct a chained error from another boxed error and a kind, and generates a backtrace
            pub fn with_boxed_chain<K>(error: Box<::std::error::Error + Send>, kind: K)
                -> $error_name
                where K: Into<$error_kind_name>
            {
                $error_name(
                    kind.into(),
-                    $crate::State::new::<$error_name>(Box::new(error), ),
+                    $crate::State::new::<$error_name>(error, ),
                )
            }
@ -137,7 +152,7 @@ macro_rules! error_chain_processed {
            }
            /// Iterates over the error chain.
-            pub fn iter(&self) -> $crate::ErrorChainIter {
+            pub fn iter(&self) -> $crate::Iter {
                $crate::ChainedError::iter(self)
            }
@ -145,6 +160,12 @@ macro_rules! error_chain_processed {
            pub fn backtrace(&self) -> Option<&$crate::Backtrace> {
                self.1.backtrace()
            }
            /// Extends the error chain with a new entry.
            pub fn chain_err<F, EK>(self, error: F) -> $error_name
                where F: FnOnce() -> EK, EK: Into<$error_kind_name> {
                $error_name::with_chain(self, Self::from_kind(error().into()))
            }
        }
        impl ::std::error::Error for $error_name {
@ -152,6 +173,7 @@ macro_rules! error_chain_processed {
                self.0.description()
            }
            #[allow(unknown_lints, unused_doc_comment)]
            fn cause(&self) -> Option<&::std::error::Error> {
                match self.1.next_error {
                    Some(ref c) => Some(&**c),
@ -229,7 +251,7 @@ macro_rules! error_chain_processed {
        // The ErrorKind type
        // --------------
-        quick_error! {
+        impl_error_chain_kind! {
            /// The kind of an error.
            #[derive(Debug)]
            pub enum $error_kind_name {
@ -290,7 +312,7 @@ macro_rules! error_chain_processed {
        // The ResultExt trait defines the `chain_err` method.
        /// Additional methods for `Result`, for easy interaction with this crate.
-        pub trait $result_ext_name<T, E> {
+        pub trait $result_ext_name<T> {
            /// If the `Result` is an `Err` then `chain_err` evaluates the closure,
            /// which returns *some type that can be converted to `ErrorKind`*, boxes
            /// the original error to store as the cause, then returns a new error
@ -300,7 +322,7 @@ macro_rules! error_chain_processed {
                      EK: Into<$error_kind_name>;
        }
-        impl<T, E> $result_ext_name<T, E> for ::std::result::Result<T, E> where E: ::std::error::Error + Send + 'static {
+        impl<T, E> $result_ext_name<T> for ::std::result::Result<T, E> where E: ::std::error::Error + Send + 'static {
            fn chain_err<F, EK>(self, callback: F) -> ::std::result::Result<T, $error_name>
                where F: FnOnce() -> EK,
                      EK: Into<$error_kind_name> {
@ -311,6 +333,16 @@ macro_rules! error_chain_processed {
            }
        }
        impl<T> $result_ext_name<T> for ::std::option::Option<T> {
            fn chain_err<F, EK>(self, callback: F) -> ::std::result::Result<T, $error_name>
                where F: FnOnce() -> EK,
                      EK: Into<$error_kind_name> {
                self.ok_or_else(move || {
                    $crate::ChainedError::from_kind(callback().into())
                })
            }
        }
    };
 }
@ -360,7 +392,7 @@ macro_rules! error_chain_processing {
        }
    };
    ( ($a:tt, $b:tt, $c:tt, $d:tt) ) => {
-        error_chain_processed! {
+        impl_error_chain_processed! {
            types $a
            links $b
            foreign_links $c
@ -369,8 +401,7 @@ macro_rules! error_chain_processing {
    };
 }
-/// This macro is used for handling of duplicated and out-of-order fields. For
+/// Macro for generating error types and traits. See crate level documentation for details.
 /// the exact rules, see `error_chain_processed`.
 #[macro_export]
 macro_rules! error_chain {
    ( $( $block_name:ident { $( $block_content:tt )* } )* ) => {
@ -393,6 +424,7 @@ macro_rules! impl_extract_backtrace {
    ($error_name: ident
     $error_kind_name: ident
     $([$link_error_path: path, $(#[$meta_links: meta])*])*) => {
        #[allow(unknown_lints, unused_doc_comment)]
        fn extract_backtrace(e: &(::std::error::Error + Send + 'static))
            -> Option<::std::sync::Arc<$crate::Backtrace>> {
            if let Some(e) = e.downcast_ref::<$error_name>() {
--- a/third_party/rust/error-chain/src/example_generated.rs
+++ b/third_party/rust/error-chain/src/example_generated.rs
@ -21,7 +21,7 @@
 /// Another code generated by the macro.
 pub mod inner {
-    error_chain! {}
+    error_chain!{}
 }
 error_chain! {
--- a/third_party/rust/error-chain/src/impl_error_chain_kind.rs
+++ b/third_party/rust/error-chain/src/impl_error_chain_kind.rs
@ -4,18 +4,19 @@
 //   - $imeta
 #[macro_export]
-macro_rules! quick_error {
+#[doc(hidden)]
 macro_rules! impl_error_chain_kind {
    (   $(#[$meta:meta])*
        pub enum $name:ident { $($chunks:tt)* }
    ) => {
-        quick_error!(SORT [pub enum $name $(#[$meta])* ]
+        impl_error_chain_kind!(SORT [pub enum $name $(#[$meta])* ]
            items [] buf []
            queue [ $($chunks)* ]);
    };
    (   $(#[$meta:meta])*
        enum $name:ident { $($chunks:tt)* }
    ) => {
-        quick_error!(SORT [enum $name $(#[$meta])* ]
+        impl_error_chain_kind!(SORT [enum $name $(#[$meta])* ]
            items [] buf []
            queue [ $($chunks)* ]);
    };
@ -27,16 +28,16 @@ macro_rules! quick_error {
        buf [ ]
        queue [ ]
    ) => {
-        quick_error!(ENUM_DEFINITION [enum $name $( #[$meta] )*]
+        impl_error_chain_kind!(ENUM_DEFINITION [enum $name $( #[$meta] )*]
            body []
            queue [$($( #[$imeta] )*
                      => $iitem: $imode [$( $ivar: $ityp ),*] )*]
        );
-        quick_error!(IMPLEMENTATIONS $name {$(
+        impl_error_chain_kind!(IMPLEMENTATIONS $name {$(
           $iitem: $imode [$(#[$imeta])*] [$( $ivar: $ityp ),*] {$( $ifuncs )*}
           )*});
        $(
-            quick_error!(ERROR_CHECK $imode $($ifuncs)*);
+            impl_error_chain_kind!(ERROR_CHECK $imode $($ifuncs)*);
        )*
    };
    (SORT [pub enum $name:ident $( #[$meta:meta] )*]
@ -46,16 +47,16 @@ macro_rules! quick_error {
        buf [ ]
        queue [ ]
    ) => {
-        quick_error!(ENUM_DEFINITION [pub enum $name $( #[$meta] )*]
+        impl_error_chain_kind!(ENUM_DEFINITION [pub enum $name $( #[$meta] )*]
            body []
            queue [$($( #[$imeta] )*
                      => $iitem: $imode [$( $ivar: $ityp ),*] )*]
        );
-        quick_error!(IMPLEMENTATIONS $name {$(
+        impl_error_chain_kind!(IMPLEMENTATIONS $name {$(
           $iitem: $imode [$(#[$imeta])*] [$( $ivar: $ityp ),*] {$( $ifuncs )*}
           )*});
        $(
-            quick_error!(ERROR_CHECK $imode $($ifuncs)*);
+            impl_error_chain_kind!(ERROR_CHECK $imode $($ifuncs)*);
        )*
    };
    // Add meta to buffer
@ -66,7 +67,7 @@ macro_rules! quick_error {
        buf [$( #[$bmeta:meta] )*]
        queue [ #[$qmeta:meta] $( $tail:tt )*]
    ) => {
-        quick_error!(SORT [$( $def )*]
+        impl_error_chain_kind!(SORT [$( $def )*]
            items [$( $(#[$imeta])* => $iitem: $imode [$( $ivar:$ityp ),*] {$( $ifuncs )*} )*]
            buf [$( #[$bmeta] )* #[$qmeta] ]
            queue [$( $tail )*]);
@ -79,7 +80,7 @@ macro_rules! quick_error {
        buf [$( #[$bmeta:meta] )*]
        queue [ $qitem:ident $( $tail:tt )*]
    ) => {
-        quick_error!(SORT [$( $def )*]
+        impl_error_chain_kind!(SORT [$( $def )*]
            items [$( $(#[$imeta])*
                      => $iitem: $imode [$( $ivar:$ityp ),*] {$( $ifuncs )*} )*]
            buf [$(#[$bmeta])* => $qitem : UNIT [ ] ]
@ -94,7 +95,7 @@ macro_rules! quick_error {
            => $bitem:ident: $bmode:tt [$( $bvar:ident: $btyp:ty ),*] ]
        queue [ #[$qmeta:meta] $( $tail:tt )*]
    ) => {
-        quick_error!(SORT [$( $def )*]
+        impl_error_chain_kind!(SORT [$( $def )*]
            enum [$( $(#[$emeta])* => $eitem $(( $($etyp),* ))* )*
                     $(#[$bmeta])* => $bitem: $bmode $(( $($btyp),* ))*]
            items [$($( #[$imeta:meta] )*
@ -111,7 +112,7 @@ macro_rules! quick_error {
        buf [$( #[$bmeta:meta] )* => $bitem:ident: UNIT [ ] ]
        queue [($( $qvar:ident: $qtyp:ty ),+) $( $tail:tt )*]
    ) => {
-        quick_error!(SORT [$( $def )*]
+        impl_error_chain_kind!(SORT [$( $def )*]
            items [$( $(#[$imeta])* => $iitem: $imode [$( $ivar:$ityp ),*] {$( $ifuncs )*} )*]
            buf [$( #[$bmeta] )* => $bitem: TUPLE [$( $qvar:$qtyp ),*] ]
            queue [$( $tail )*]
@ -125,7 +126,7 @@ macro_rules! quick_error {
        buf [$( #[$bmeta:meta] )* => $bitem:ident: UNIT [ ] ]
        queue [{ $( $qvar:ident: $qtyp:ty ),+} $( $tail:tt )*]
    ) => {
-        quick_error!(SORT [$( $def )*]
+        impl_error_chain_kind!(SORT [$( $def )*]
            items [$( $(#[$imeta])* => $iitem: $imode [$( $ivar:$ityp ),*] {$( $ifuncs )*} )*]
            buf [$( #[$bmeta] )* => $bitem: STRUCT [$( $qvar:$qtyp ),*] ]
            queue [$( $tail )*]);
@ -138,7 +139,7 @@ macro_rules! quick_error {
        buf [$( #[$bmeta:meta] )* => $bitem:ident: UNIT [ ] ]
        queue [{$( $qvar:ident: $qtyp:ty ),+ ,} $( $tail:tt )*]
    ) => {
-        quick_error!(SORT [$( $def )*]
+        impl_error_chain_kind!(SORT [$( $def )*]
            items [$( $(#[$imeta])* => $iitem: $imode [$( $ivar:$ityp ),*] {$( $ifuncs )*} )*]
            buf [$( #[$bmeta] )* => $bitem: STRUCT [$( $qvar:$qtyp ),*] ]
            queue [$( $tail )*]);
@ -152,7 +153,7 @@ macro_rules! quick_error {
                 => $bitem:ident: $bmode:tt [$( $bvar:ident: $btyp:ty ),*] ]
        queue [ {$( $qfuncs:tt )*} $( $tail:tt )*]
    ) => {
-        quick_error!(SORT [$( $def )*]
+        impl_error_chain_kind!(SORT [$( $def )*]
            items [$( $(#[$imeta])* => $iitem: $imode [$( $ivar:$ityp ),*] {$( $ifuncs )*} )*
                      $(#[$bmeta])* => $bitem: $bmode [$( $bvar:$btyp ),*] {$( $qfuncs )*} ]
            buf [ ]
@ -167,7 +168,7 @@ macro_rules! quick_error {
                 => $bitem:ident: $bmode:tt [$( $bvar:ident: $btyp:ty ),*] ]
        queue [ $qitem:ident $( $tail:tt )*]
    ) => {
-        quick_error!(SORT [$( $def )*]
+        impl_error_chain_kind!(SORT [$( $def )*]
            items [$( $(#[$imeta])* => $iitem: $imode [$( $ivar:$ityp ),*] {$( $ifuncs )*} )*
                     $(#[$bmeta])* => $bitem: $bmode [$( $bvar:$btyp ),*] {} ]
            buf [ => $qitem : UNIT [ ] ]
@ -182,7 +183,7 @@ macro_rules! quick_error {
            => $bitem:ident: $bmode:tt [$( $bvar:ident: $btyp:ty ),*] ]
        queue [ ]
    ) => {
-        quick_error!(SORT [$( $def )*]
+        impl_error_chain_kind!(SORT [$( $def )*]
            items [$( $(#[$imeta])* => $iitem: $imode [$( $ivar:$ityp ),*] {$( $ifuncs )*} )*
                     $(#[$bmeta])* => $bitem: $bmode [$( $bvar:$btyp ),*] {} ]
            buf [ ]
@ -200,6 +201,9 @@ macro_rules! quick_error {
                $(#[$imeta])*
                $iitem $(($( $ttyp ),*))* $({$( $svar: $styp ),*})*,
            )*
            #[doc(hidden)]
            __Nonexhaustive {}
        }
    };
    // Private enum (Queue Empty)
@ -223,7 +227,7 @@ macro_rules! quick_error {
        queue [$( #[$qmeta:meta] )*
            => $qitem:ident: UNIT [ ] $( $queue:tt )*]
    ) => {
-        quick_error!(ENUM_DEFINITION [ $($def)* ]
+        impl_error_chain_kind!(ENUM_DEFINITION [ $($def)* ]
            body [$($( #[$imeta] )* => $iitem ($(($( $ttyp ),+))*) {$({$( $svar: $styp ),*})*} )*
                    $( #[$qmeta] )* => $qitem () {} ]
            queue [ $($queue)* ]
@ -236,7 +240,7 @@ macro_rules! quick_error {
        queue [$( #[$qmeta:meta] )*
            => $qitem:ident: TUPLE [$( $qvar:ident: $qtyp:ty ),+] $( $queue:tt )*]
    ) => {
-        quick_error!(ENUM_DEFINITION [ $($def)* ]
+        impl_error_chain_kind!(ENUM_DEFINITION [ $($def)* ]
            body [$($( #[$imeta] )* => $iitem ($(($( $ttyp ),+))*) {$({$( $svar: $styp ),*})*} )*
                    $( #[$qmeta] )* => $qitem (($( $qtyp ),*)) {} ]
            queue [ $($queue)* ]
@ -249,7 +253,7 @@ macro_rules! quick_error {
        queue [$( #[$qmeta:meta] )*
            => $qitem:ident: STRUCT [$( $qvar:ident: $qtyp:ty ),*] $( $queue:tt )*]
    ) => {
-        quick_error!(ENUM_DEFINITION [ $($def)* ]
+        impl_error_chain_kind!(ENUM_DEFINITION [ $($def)* ]
            body [$($( #[$imeta] )* => $iitem ($(($( $ttyp ),+))*) {$({$( $svar: $styp ),*})*} )*
                    $( #[$qmeta] )* => $qitem () {{$( $qvar: $qtyp ),*}} ]
            queue [ $($queue)* ]
@ -260,7 +264,7 @@ macro_rules! quick_error {
            $item:ident: $imode:tt [$(#[$imeta:meta])*] [$( $var:ident: $typ:ty ),*] {$( $funcs:tt )*}
        )*}
    ) => {
-        #[allow(unused)]
+        #[allow(unknown_lints, unused, unused_doc_comment)]
        impl ::std::fmt::Display for $name {
            fn fmt(&self, fmt: &mut ::std::fmt::Formatter)
                -> ::std::fmt::Result
@ -268,16 +272,18 @@ macro_rules! quick_error {
                match *self {
                    $(
                        $(#[$imeta])*
-                        quick_error!(ITEM_PATTERN
+                        impl_error_chain_kind!(ITEM_PATTERN
                            $name $item: $imode [$( ref $var ),*]
                        ) => {
-                            let display_fn = quick_error!(FIND_DISPLAY_IMPL
+                            let display_fn = impl_error_chain_kind!(FIND_DISPLAY_IMPL
                                $name $item: $imode
                                {$( $funcs )*});
                            display_fn(self, fmt)
                        }
                    )*
                    _ => Ok(())
                }
            }
        }
@ -286,10 +292,10 @@ macro_rules! quick_error {
            fn description(&self) -> &str {
                match *self {
                    $(
-                        quick_error!(ITEM_PATTERN
+                        impl_error_chain_kind!(ITEM_PATTERN
                            $name $item: $imode [$( ref $var ),*]
                        ) => {
-                            quick_error!(FIND_DESCRIPTION_IMPL
+                            impl_error_chain_kind!(FIND_DESCRIPTION_IMPL
                                $item: $imode self fmt [$( $var ),*]
                                {$( $funcs )*})
                        }
@ -299,10 +305,10 @@ macro_rules! quick_error {
            fn cause(&self) -> Option<&::std::error::Error> {
                match *self {
                    $(
-                        quick_error!(ITEM_PATTERN
+                        impl_error_chain_kind!(ITEM_PATTERN
                            $name $item: $imode [$( ref $var ),*]
                        ) => {
-                            quick_error!(FIND_CAUSE_IMPL
+                            impl_error_chain_kind!(FIND_CAUSE_IMPL
                                $item: $imode [$( $var ),*]
                                {$( $funcs )*})
                        }
@ -310,26 +316,28 @@ macro_rules! quick_error {
                }
            }
        }*/
-        #[allow(unused)]
+        #[allow(unknown_lints, unused, unused_doc_comment)]
        impl $name {
            /// A string describing the error kind.
            pub fn description(&self) -> &str {
                match *self {
                    $(
                        $(#[$imeta])*
-                        quick_error!(ITEM_PATTERN
+                        impl_error_chain_kind!(ITEM_PATTERN
                            $name $item: $imode [$( ref $var ),*]
                        ) => {
-                            quick_error!(FIND_DESCRIPTION_IMPL
+                            impl_error_chain_kind!(FIND_DESCRIPTION_IMPL
                                $item: $imode self fmt [$( $var ),*]
                                {$( $funcs )*})
                        }
                    )*
                    _ => "",
                }
            }
        }
        $(
-            quick_error!(FIND_FROM_IMPL
+            impl_error_chain_kind!(FIND_FROM_IMPL
                $name $item: $imode [$( $var:$typ ),*]
                {$( $funcs )*});
        )*
@ -337,7 +345,7 @@ macro_rules! quick_error {
    (FIND_DISPLAY_IMPL $name:ident $item:ident: $imode:tt
        { display($self_:tt) -> ($( $exprs:tt )*) $( $tail:tt )*}
    ) => {
-        |quick_error!(IDENT $self_): &$name, f: &mut ::std::fmt::Formatter| {
+        |impl_error_chain_kind!(IDENT $self_): &$name, f: &mut ::std::fmt::Formatter| {
            write!(f, $( $exprs )*)
        }
    };
@ -354,7 +362,7 @@ macro_rules! quick_error {
    (FIND_DISPLAY_IMPL $name:ident $item:ident: $imode:tt
        { $t:tt $( $tail:tt )*}
    ) => {
-        quick_error!(FIND_DISPLAY_IMPL
+        impl_error_chain_kind!(FIND_DISPLAY_IMPL
            $name $item: $imode
            {$( $tail )*})
    };
@ -375,7 +383,7 @@ macro_rules! quick_error {
        [$( $var:ident ),*]
        { $t:tt $( $tail:tt )*}
    ) => {
-        quick_error!(FIND_DESCRIPTION_IMPL
+        impl_error_chain_kind!(FIND_DESCRIPTION_IMPL
            $item: $imode $me $fmt [$( $var ),*]
            {$( $tail )*})
    };
@ -395,7 +403,7 @@ macro_rules! quick_error {
        [$( $var:ident ),*]
        { $t:tt $( $tail:tt )*}
    ) => {
-        quick_error!(FIND_CAUSE_IMPL
+        impl_error_chain_kind!(FIND_CAUSE_IMPL
            $item: $imode [$( $var ),*]
            { $($tail)* })
    };
@ -416,7 +424,7 @@ macro_rules! quick_error {
                }
            }
        )*
-        quick_error!(FIND_FROM_IMPL
+        impl_error_chain_kind!(FIND_FROM_IMPL
            $name $item: $imode [$( $var:$typ ),*]
            {$( $tail )*});
    };
@ -429,7 +437,7 @@ macro_rules! quick_error {
                $name::$item
            }
        }
-        quick_error!(FIND_FROM_IMPL
+        impl_error_chain_kind!(FIND_FROM_IMPL
            $name $item: UNIT [  ]
            {$( $tail )*});
    };
@ -442,7 +450,7 @@ macro_rules! quick_error {
                $name::$item($( $texpr ),*)
            }
        }
-        quick_error!(FIND_FROM_IMPL
+        impl_error_chain_kind!(FIND_FROM_IMPL
            $name $item: TUPLE [$( $var:$typ ),*]
            { $($tail)* });
    };
@ -457,7 +465,7 @@ macro_rules! quick_error {
                }
            }
        }
-        quick_error!(FIND_FROM_IMPL
+        impl_error_chain_kind!(FIND_FROM_IMPL
            $name $item: STRUCT [$( $var:$typ ),*]
            { $($tail)* });
    };
@ -465,7 +473,7 @@ macro_rules! quick_error {
        [$( $var:ident: $typ:ty ),*]
        { $t:tt $( $tail:tt )*}
    ) => {
-        quick_error!(FIND_FROM_IMPL
+        impl_error_chain_kind!(FIND_FROM_IMPL
            $name $item: $imode [$( $var:$typ ),*]
            {$( $tail )*}
        );
@ -506,24 +514,28 @@ macro_rules! quick_error {
    // This is to contrast FIND_* clauses which just find stuff they need and
    // skip everything else completely
    (ERROR_CHECK $imode:tt display($self_:tt) -> ($( $exprs:tt )*) $( $tail:tt )*)
-    => { quick_error!(ERROR_CHECK $imode $($tail)*); };
+    => { impl_error_chain_kind!(ERROR_CHECK_COMMA $imode $($tail)*); };
    (ERROR_CHECK $imode:tt display($pattern: expr) $( $tail:tt )*)
-    => { quick_error!(ERROR_CHECK $imode $($tail)*); };
+    => { impl_error_chain_kind!(ERROR_CHECK_COMMA $imode $($tail)*); };
    (ERROR_CHECK $imode:tt display($pattern: expr, $( $exprs:tt )*) $( $tail:tt )*)
-    => { quick_error!(ERROR_CHECK $imode $($tail)*); };
+    => { impl_error_chain_kind!(ERROR_CHECK_COMMA $imode $($tail)*); };
    (ERROR_CHECK $imode:tt description($expr:expr) $( $tail:tt )*)
-    => { quick_error!(ERROR_CHECK $imode $($tail)*); };
+    => { impl_error_chain_kind!(ERROR_CHECK_COMMA $imode $($tail)*); };
    (ERROR_CHECK $imode:tt cause($expr:expr) $($tail:tt)*)
-    => { quick_error!(ERROR_CHECK $imode $($tail)*); };
+    => { impl_error_chain_kind!(ERROR_CHECK_COMMA $imode $($tail)*); };
    (ERROR_CHECK $imode:tt from() $($tail:tt)*)
-    => { quick_error!(ERROR_CHECK $imode $($tail)*); };
+    => { impl_error_chain_kind!(ERROR_CHECK_COMMA $imode $($tail)*); };
    (ERROR_CHECK $imode:tt from($ftyp:ty) $($tail:tt)*)
-    => { quick_error!(ERROR_CHECK $imode $($tail)*); };
+    => { impl_error_chain_kind!(ERROR_CHECK_COMMA $imode $($tail)*); };
    (ERROR_CHECK TUPLE from($fvar:ident: $ftyp:ty) -> ($( $e:expr ),*) $( $tail:tt )*)
-    => { quick_error!(ERROR_CHECK TUPLE $($tail)*); };
+    => { impl_error_chain_kind!(ERROR_CHECK_COMMA TUPLE $($tail)*); };
    (ERROR_CHECK STRUCT from($fvar:ident: $ftyp:ty) -> {$( $v:ident: $e:expr ),*} $( $tail:tt )*)
-    => { quick_error!(ERROR_CHECK STRUCT $($tail)*); };
+        => { impl_error_chain_kind!(ERROR_CHECK_COMMA STRUCT $($tail)*); };
    (ERROR_CHECK $imode:tt ) => {};
    (ERROR_CHECK_COMMA $imode:tt , $( $tail:tt )*)
    => { impl_error_chain_kind!(ERROR_CHECK $imode $($tail)*); };
    (ERROR_CHECK_COMMA $imode:tt $( $tail:tt )*)
    => { impl_error_chain_kind!(ERROR_CHECK $imode $($tail)*); };
    // Utility functions
    (IDENT $ident:ident) => { $ident }
 }
--- a/third_party/rust/error-chain/src/lib.rs
+++ b/third_party/rust/error-chain/src/lib.rs
@ -1,4 +1,6 @@
 #![deny(missing_docs)]
 #![allow(unknown_lints)] // to be removed when unused_doc_comments lints is merged
 #![doc(html_root_url = "https://docs.rs/error-chain/0.11.0")]
 //! A library for consistent and reliable error handling
 //!
@ -14,7 +16,7 @@
 //! follow the [quickstart.rs] template, and read this [intro]
 //! to error-chain.
 //!
-//! [quickstart.rs]: https://github.com/brson/error-chain/blob/master/examples/quickstart.rs
+//! [quickstart.rs]: https://github.com/rust-lang-nursery/error-chain/blob/master/examples/quickstart.rs
 //! [intro]: http://brson.github.io/2016/11/30/starting-with-error-chain
 //!
 //! ## Why error chain?
@ -22,7 +24,7 @@
 //! * error-chain is easy to configure. Handle errors robustly with minimal
 //!   effort.
 //! * Basic error handling requires no maintenance of custom error types
-//!   nor the `From` conversions that make `?` work.
+//!   nor the [`From`] conversions that make `?` work.
 //! * error-chain scales from simple error handling strategies to more
 //!   rigorous.  Return formatted strings for simple errors, only
 //!   introducing error variants and their strong typing as needed for
@ -38,56 +40,56 @@
 //! error-chain is based on the following principles:
 //!
 //! * No error should ever be discarded. This library primarily
-//!   makes it easy to "chain" errors with the `chain_err` method.
+//!   makes it easy to "chain" errors with the [`chain_err`] method.
 //! * Introducing new errors is trivial. Simple errors can be introduced
 //!   at the error site with just a string.
 //! * Handling errors is possible with pattern matching.
 //! * Conversions between error types are done in an automatic and
-//!   consistent way - `From` conversion behavior is never specified
+//!   consistent way - [`From`] conversion behavior is never specified
 //!   explicitly.
-//! * Errors implement Send.
+//! * Errors implement [`Send`].
 //! * Errors can carry backtraces.
 //!
 //! Similar to other libraries like [error-type] and [quick-error],
 //! this library introduces the error chaining mechanism originally
-//! employed by Cargo.  The `error_chain!` macro declares the types
+//! employed by Cargo.  The [`error_chain!`] macro declares the types
 //! and implementation boilerplate necessary for fulfilling a
 //! particular error-handling strategy. Most importantly it defines a
-//! custom error type (called `Error` by convention) and the `From`
+//! custom error type (called [`Error`] by convention) and the [`From`]
-//! conversions that let the `try!` macro and `?` operator work.
+//! conversions that let the `?` operator work.
 //!
 //! This library differs in a few ways from previous error libs:
 //!
-//! * Instead of defining the custom `Error` type as an enum, it is a
+//! * Instead of defining the custom [`Error`] type as an enum, it is a
-//!   struct containing an `ErrorKind` (which defines the
+//!   struct containing an [`ErrorKind`][] (which defines the
-//!   `description` and `display` methods for the error), an opaque,
+//!   [`description`] and [`display_chain`] methods for the error), an opaque,
-//!   optional, boxed `std::error::Error + Send + 'static` object
+//!   optional, boxed [`std::error::Error`]` + `[`Send`]` + 'static` object
-//!   (which defines the `cause`, and establishes the links in the
+//!   (which defines the [`cause`], and establishes the links in the
-//!   error chain), and a `Backtrace`.
+//!   error chain), and a [`Backtrace`].
-//! * The macro also defines a `ResultExt` trait that defines a
+//! * The macro also defines a [`ResultExt`] trait that defines a
-//!   `chain_err` method. This method on all `std::error::Error + Send + 'static`
+//!   [`chain_err`] method. This method on all [`std::error::Error`]` + `[`Send`]` + 'static`
 //!   types extends the error chain by boxing the current
 //!   error into an opaque object and putting it inside a new concrete
 //!   error.
-//! * It provides automatic `From` conversions between other error types
+//! * It provides automatic [`From`] conversions between other error types
-//!   defined by the `error_chain!` that preserve type information,
+//!   defined by the [`error_chain!`] that preserve type information,
 //!   and facilitate seamless error composition and matching of composed
 //!   errors.
-//! * It provides automatic `From` conversions between any other error
+//! * It provides automatic [`From`] conversions between any other error
-//!   type that hides the type of the other error in the `cause` box.
+//!   type that hides the type of the other error in the [`cause`] box.
 //! * If `RUST_BACKTRACE` is enabled, it collects a single backtrace at
 //!   the earliest opportunity and propagates it down the stack through
-//!   `From` and `ResultExt` conversions.
+//!   [`From`] and [`ResultExt`] conversions.
 //!
 //! To accomplish its goals it makes some tradeoffs:
 //!
-//! * The split between the `Error` and `ErrorKind` types can make it
+//! * The split between the [`Error`] and [`ErrorKind`] types can make it
 //!   slightly more cumbersome to instantiate new (unchained) errors,
-//!   requiring an `Into` or `From` conversion; as well as slightly
+//!   requiring an [`Into`] or [`From`] conversion; as well as slightly
 //!   more cumbersome to match on errors with another layer of types
 //!   to match.
-//! * Because the error type contains `std::error::Error + Send + 'static` objects,
+//! * Because the error type contains [`std::error::Error`]` + `[`Send`]` + 'static` objects,
-//!   it can't implement `PartialEq` for easy comparisons.
+//!   it can't implement [`PartialEq`] for easy comparisons.
 //!
 //! ## Declaring error types
 //!
@ -96,7 +98,7 @@
 //! basis, such as per module.
 //!
 //! Assuming you are using crate-level error types, typically you will
-//! define an `errors` module and inside it call `error_chain!`:
+//! define an `errors` module and inside it call [`error_chain!`]:
 //!
 //! ```
 //! # #[macro_use] extern crate error_chain;
@ -147,14 +149,20 @@
 //!         Io(::std::io::Error) #[cfg(unix)];
 //!     }
 //!
-//!     // Define additional `ErrorKind` variants. The syntax here is
+//!     // Define additional `ErrorKind` variants.  Define custom responses with the
-//!     // the same as `quick_error!`, but the `from()` and `cause()`
+//!     // `description` and `display` calls.
 //!     // syntax is not supported.
 //!     errors {
 //!         InvalidToolchainName(t: String) {
 //!             description("invalid toolchain name")
 //!             display("invalid toolchain name: '{}'", t)
 //!         }
 //!
 //!         // You can also add commas after description/display.
 //!         // This may work better with some editor auto-indentation modes:
 //!         UnknownToolchainVersion(v: String) {
 //!             description("unknown toolchain version"), // note the ,
 //!             display("unknown toolchain version: '{}'", v), // trailing comma is allowed
 //!         }
 //!     }
 //! }
 //!
@ -165,9 +173,9 @@
 //! be omitted if it is empty.
 //!
 //! This populates the module with a number of definitions,
-//! the most important of which are the `Error` type
+//! the most important of which are the [`Error`] type
-//! and the `ErrorKind` type. An example of generated code can be found in the
+//! and the [`ErrorKind`] type. An example of generated code can be found in the
-//! [example_generated](example_generated) module.
+//! [example_generated](example_generated/index.html) module.
 //!
 //! ## Returning new errors
 //!
@ -182,7 +190,7 @@
 //! }
 //! ```
 //!
-//! Introducing new error chains, with an `ErrorKind`:
+//! Introducing new error chains, with an [`ErrorKind`]:
 //!
 //! ```
 //! # #[macro_use] extern crate error_chain;
@ -196,37 +204,37 @@
 //! }
 //! ```
 //!
-//! Note that the return type is the typedef `Result`, which is
+//! Note that the return type is the typedef [`Result`], which is
 //! defined by the macro as `pub type Result<T> =
 //! ::std::result::Result<T, Error>`. Note that in both cases
-//! `.into()` is called to convert a type into the `Error` type; both
+//! [`.into()`] is called to convert a type into the [`Error`] type; both
-//! strings and `ErrorKind` have `From` conversions to turn them into
+//! strings and [`ErrorKind`] have [`From`] conversions to turn them into
-//! `Error`.
+//! [`Error`].
 //!
-//! When the error is emitted inside a `try!` macro or behind the
+//! When the error is emitted behind the `?` operator, the explicit conversion
-//! `?` operator, the explicit conversion isn't needed; `try!` will
+//! isn't needed; `Err(ErrorKind)` will automatically be converted to `Err(Error)`.
-//! automatically convert `Err(ErrorKind)` to `Err(Error)`. So the
+//! So the below is equivalent to the previous:
 //! below is equivalent to the previous:
 //!
 //! ```
 //! # #[macro_use] extern crate error_chain;
 //! # fn main() {}
 //! # error_chain! { errors { FooError } }
 //! fn foo() -> Result<()> {
-//!     Ok(try!(Err(ErrorKind::FooError)))
+//!     Ok(Err(ErrorKind::FooError)?)
 //! }
 //!
 //! fn bar() -> Result<()> {
-//!     Ok(try!(Err("bogus!")))
+//!     Ok(Err("bogus!")?)
 //! }
 //! ```
 //!
 //! ## The `bail!` macro
 //!
 //! The above method of introducing new errors works but is a little
-//! verbose. Instead we can use the `bail!` macro, which, much like `try!`
+//! verbose. Instead, we can use the [`bail!`] macro, which performs an early return
-//! and `?`, performs an early return with conversions. With `bail!` the
+//! with conversions done automatically.
-//! previous examples look like:
+//!
 //! With [`bail!`] the previous examples look like:
 //!
 //! ```
 //! # #[macro_use] extern crate error_chain;
@ -250,6 +258,8 @@
 //! ```
 //!
 //! ## Chaining errors
 //! error-chain supports extending an error chain by appending new errors.
 //! This can be done on a Result or on an existing Error.
 //!
 //! To extend the error chain:
 //!
@ -264,17 +274,63 @@
 //! # }
 //! ```
 //!
-//! `chain_err` can be called on any `Result` type where the contained
+//! [`chain_err`] can be called on any [`Result`] type where the contained
-//! error type implements `std::error::Error + Send + 'static`.  If
+//! error type implements [`std::error::Error`]` + `[`Send`]` + 'static`, as long as
-//! the `Result` is an `Err` then `chain_err` evaluates the closure,
+//! the [`Result`] type's corresponding [`ResultExt`] trait is in scope.  If
-//! which returns *some type that can be converted to `ErrorKind`*,
+//! the [`Result`] is an `Err` then [`chain_err`] evaluates the closure,
 //! which returns *some type that can be converted to [`ErrorKind`]*,
 //! boxes the original error to store as the cause, then returns a new
 //! error containing the original error.
 //!
 //! Calling [`chain_err`][Error_chain_err] on an existing [`Error`] instance has
 //! the same signature and produces the same outcome as being called on a
 //! [`Result`] matching the properties described above. This is most useful when
 //! partially handling errors using the [`map_err`] function.
 //!
 //! To chain an error directly, use [`with_chain`]:
 //!
 //! ```
 //! # #[macro_use] extern crate error_chain;
 //! # fn main() {}
 //! # error_chain! {}
 //! # fn do_something() -> Result<()> { unimplemented!() }
 //! # fn test() -> Result<()> {
 //! let res: Result<()> =
 //!     do_something().map_err(|e| Error::with_chain(e, "something went wrong"));
 //! # Ok(())
 //! # }
 //! ```
 //!
 //! ## Linking errors
 //!
 //! To convert an error from another error chain to this error chain:
 //!
 //! ```
 //! # #[macro_use] extern crate error_chain;
 //! # fn main() {}
 //! # mod other { error_chain! {} }
 //! error_chain! {
 //!     links {
 //!         OtherError(other::Error, other::ErrorKind);
 //!     }
 //! }
 //!
 //! fn do_other_thing() -> other::Result<()> { unimplemented!() }
 //!
 //! # fn test() -> Result<()> {
 //! let res: Result<()> = do_other_thing().map_err(|e| e.into());
 //! # Ok(())
 //! # }
 //! ```
 //!
 //! The [`Error`] and [`ErrorKind`] types implements [`From`] for the corresponding
 //! types of all linked error chains. Linked errors do not introduce a new
 //! cause to the error chain.
 //!
 //! ## Matching errors
 //!
 //! error-chain error variants are matched with simple patterns.
-//! `Error` is a tuple struct and its first field is the `ErrorKind`,
+//! [`Error`] is a tuple struct and its first field is the [`ErrorKind`],
 //! making dispatching on error kinds relatively compact:
 //!
 //! ```
@ -292,6 +348,7 @@
 //! match Error::from("error!") {
 //!     Error(ErrorKind::InvalidToolchainName(_), _) => { }
 //!     Error(ErrorKind::Msg(_), _) => { }
 //!     _ => { }
 //! }
 //! # }
 //! ```
@ -327,22 +384,69 @@
 //! # }
 //! ```
 //!
 //! ## Inspecting errors
 //!
 //! An error-chain error contains information about the error itself, a backtrace, and the chain
 //! of causing errors. For reporting purposes, this information can be accessed as follows.
 //!
 //! ```
 //! # #[macro_use] extern crate error_chain;
 //! use error_chain::ChainedError;  // for e.display_chain()
 //!
 //! error_chain! {
 //!     errors {
 //!         InvalidToolchainName(t: String) {
 //!             description("invalid toolchain name")
 //!             display("invalid toolchain name: '{}'", t)
 //!         }
 //!     }
 //! }
 //!
 //! # fn main() {
 //! // Generate an example error to inspect:
 //! let e = "xyzzy".parse::<i32>()
 //!     .chain_err(|| ErrorKind::InvalidToolchainName("xyzzy".to_string()))
 //!     .unwrap_err();
 //!
 //! // Get the brief description of the error:
 //! assert_eq!(e.description(), "invalid toolchain name");
 //!
 //! // Get the display version of the error:
 //! assert_eq!(e.to_string(), "invalid toolchain name: 'xyzzy'");
 //!
 //! // Get the full cause and backtrace:
 //! println!("{}", e.display_chain().to_string());
 //! //     Error: invalid toolchain name: 'xyzzy'
 //! //     Caused by: invalid digit found in string
 //! //     stack backtrace:
 //! //        0:     0x7fa9f684fc94 - backtrace::backtrace::libunwind::trace
 //! //                             at src/backtrace/libunwind.rs:53
 //! //                              - backtrace::backtrace::trace<closure>
 //! //                             at src/backtrace/mod.rs:42
 //! //        1:     0x7fa9f6850b0e - backtrace::capture::{{impl}}::new
 //! //                             at out/capture.rs:79
 //! //     [..]
 //! # }
 //! ```
 //!
 //! The [`Error`] and [`ErrorKind`] types also allow programmatic access to these elements.
 //!
 //! ## Foreign links
 //!
 //! Errors that do not conform to the same conventions as this library
 //! can still be included in the error chain. They are considered "foreign
 //! errors", and are declared using the `foreign_links` block of the
-//! `error_chain!` macro. `Error`s are automatically created from
+//! [`error_chain!`] macro. [`Error`]s are automatically created from
-//! foreign errors by the `try!` macro.
+//! foreign errors by the `?` operator.
 //!
 //! Foreign links and regular links have one crucial difference:
-//! `From` conversions for regular links *do not introduce a new error
+//! [`From`] conversions for regular links *do not introduce a new error
 //! into the error chain*, while conversions for foreign links *always
 //! introduce a new error into the error chain*. So for the example
-//! above all errors deriving from the `temp::Error` type will be
+//! above all errors deriving from the [`std::fmt::Error`] type will be
-//! presented to the user as a new `ErrorKind::Temp` variant, and the
+//! presented to the user as a new [`ErrorKind`] variant, and the
-//! cause will be the original `temp::Error` error. In contrast, when
+//! cause will be the original [`std::fmt::Error`] error. In contrast, when
-//! `rustup_utils::Error` is converted to `Error` the two `ErrorKind`s
+//! `other_error::Error` is converted to `Error` the two `ErrorKind`s
 //! are converted between each other to create a new `Error` but the
 //! old error is discarded; there is no "cause" created from the
 //! original error.
@ -351,19 +455,87 @@
 //!
 //! If the `RUST_BACKTRACE` environment variable is set to anything
 //! but ``0``, the earliest non-foreign error to be generated creates
-//! a single backtrace, which is passed through all `From` conversions
+//! a single backtrace, which is passed through all [`From`] conversions
-//! and `chain_err` invocations of compatible types. To read the
+//! and [`chain_err`] invocations of compatible types. To read the
-//! backtrace just call the `backtrace()` method.
+//! backtrace just call the [`backtrace`] method.
 //!
 //! Backtrace generation can be disabled by turning off the `backtrace` feature.
 //!
 //! The Backtrace contains a Vec of [`BacktraceFrame`]s that can be operated
 //! on directly.  For example, to only see the files and line numbers of code
 //! within your own project.
 //!
 //! ```
 //! # #[macro_use]
 //! # extern crate error_chain;
 //! # mod errors {
 //! #   error_chain! {
 //! #       foreign_links {
 //! #           Io(::std::io::Error);
 //! #       }
 //! #   }
 //! # }
 //! # use errors::*;
 //! # #[cfg(feature="backtrace")]
 //! # fn main() {
 //! if let Err(ref e) = open_file() {
 //!     if let Some(backtrace) = e.backtrace() {
 //!         let frames = backtrace.frames();
 //!         for frame in frames.iter() {
 //!             for symbol in frame.symbols().iter() {
 //!                 if let (Some(file), Some(lineno)) = (symbol.filename(), symbol.lineno()) {
 //!                     if file.display().to_string()[0..3] == "src".to_string(){
 //!                         println!("{}:{}", file.display().to_string(), lineno);
 //!                     }
 //!                 }
 //!             }
 //!         }
 //!     }
 //! };
 //! # }
 //! # #[cfg(not(feature="backtrace"))]
 //! # fn main() { }
 //!
 //! fn open_file() -> Result<()> {
 //!    std::fs::File::open("does_not_exist")?;
 //!    Ok(())
 //! }
 //! ```
 //!
 //! ## Iteration
 //!
-//! The `iter` method returns an iterator over the chain of error boxes.
+//! The [`iter`] method returns an iterator over the chain of error boxes.
 //!
 //! [error-type]: https://github.com/DanielKeep/rust-error-type
 //! [quick-error]: https://github.com/tailhook/quick-error
 //! [`display_chain`]: trait.ChainedError.html#method.display_chain
 //! [`error_chain!`]: macro.error_chain.html
 //! [`bail!`]: macro.bail.html
 //! [`Backtrace`]: struct.Backtrace.html
 //! [`Error`]: example_generated/struct.Error.html
 //! [`with_chain`]: example_generated/struct.Error.html#method.with_chain
 //! [Error_chain_err]: example_generated/struct.Error.html#method.chain_err
 //! [`cause`]: example_generated/struct.Error.html#method.cause
 //! [`backtrace`]: example_generated/struct.Error.html#method.backtrace
 //! [`iter`]: example_generated/struct.Error.html#method.iter
 //! [`ErrorKind`]: example_generated/enum.ErrorKind.html
 //! [`description`]: example_generated/enum.ErrorKind.html#method.description
 //! [`Result`]: example_generated/type.Result.html
 //! [`ResultExt`]: example_generated/trait.ResultExt.html
 //! [`chain_err`]: example_generated/trait.ResultExt.html#tymethod.chain_err
 //! [`std::error::Error`]: https://doc.rust-lang.org/std/error/trait.Error.html
 //! [`Send`]: https://doc.rust-lang.org/std/marker/trait.Send.html
 //! [`Into`]: https://doc.rust-lang.org/std/convert/trait.Into.html
 //! [`From`]: https://doc.rust-lang.org/std/convert/trait.From.html
 //! [`PartialEq`]: https://doc.rust-lang.org/std/cmp/trait.PartialEq.html
 //! [`std::fmt::Error`]: https://doc.rust-lang.org/std/fmt/struct.Error.html
 //! [`.into()`]: https://doc.rust-lang.org/std/convert/trait.Into.html#tymethod.into
 //! [`map_err`]: https://doc.rust-lang.org/std/result/enum.Result.html#method.map_err
 //! [`BacktraceFrame`]: https://docs.rs/backtrace/0.3.2/backtrace/struct.BacktraceFrame.html
 #[cfg(feature = "backtrace")]
 extern crate backtrace;
@ -381,7 +553,7 @@ pub use backtrace::Backtrace;
 pub type Backtrace = ();
 #[macro_use]
-mod quick_error;
+mod impl_error_chain_kind;
 #[macro_use]
 mod error_chain;
 #[macro_use]
@ -390,10 +562,18 @@ pub use quick_main::ExitCode;
 #[cfg(feature = "example_generated")]
 pub mod example_generated;
 #[derive(Debug)]
 /// Iterator over the error chain using the `Error::cause()` method.
-pub struct ErrorChainIter<'a>(pub Option<&'a error::Error>);
+pub struct Iter<'a>(Option<&'a error::Error>);
-impl<'a> Iterator for ErrorChainIter<'a> {
+impl<'a> Iter<'a> {
    /// Returns a new iterator over the error chain using `Error::cause()`.
    pub fn new(err: Option<&'a error::Error>) -> Iter<'a> {
        Iter(err)
    }
 }
 impl<'a> Iterator for Iter<'a> {
    type Item = &'a error::Error;
    fn next<'b>(&'b mut self) -> Option<&'a error::Error> {
@ -413,9 +593,29 @@ impl<'a> Iterator for ErrorChainIter<'a> {
 #[cfg(feature = "backtrace")]
 #[doc(hidden)]
 pub fn make_backtrace() -> Option<Arc<Backtrace>> {
-    match std::env::var_os("RUST_BACKTRACE") {
+    use std::sync::atomic::{ATOMIC_USIZE_INIT, AtomicUsize, Ordering};
-        Some(ref val) if val != "0" => Some(Arc::new(Backtrace::new())),
+
-        _ => None,
+    // The lowest bit indicates whether the value was computed,
    // while the second lowest bit is the actual "enabled" bit.
    static BACKTRACE_ENABLED_CACHE: AtomicUsize = ATOMIC_USIZE_INIT;
    let enabled = match BACKTRACE_ENABLED_CACHE.load(Ordering::Relaxed) {
        0 => {
            let enabled = match std::env::var_os("RUST_BACKTRACE") {
                Some(ref val) if val != "0" => true,
                _ => false
            };
            let encoded = ((enabled as usize) << 1) | 1;
            BACKTRACE_ENABLED_CACHE.store(encoded, Ordering::Relaxed);
            enabled
        }
        encoded => (encoded >> 1) != 0
    };
    if enabled {
        Some(Arc::new(Backtrace::new()))
    } else {
        None
    }
 }
@ -438,7 +638,7 @@ pub trait ChainedError: error::Error + Send + 'static {
    fn kind(&self) -> &Self::ErrorKind;
    /// Iterates over the error chain.
-    fn iter(&self) -> ErrorChainIter;
+    fn iter(&self) -> Iter;
    /// Returns the backtrace associated with this error.
    fn backtrace(&self) -> Option<&Backtrace>;
@ -447,10 +647,15 @@ pub trait ChainedError: error::Error + Send + 'static {
    /// context of this error.
    ///
    /// The full cause chain and backtrace, if present, will be printed.
-    fn display<'a>(&'a self) -> Display<'a, Self> {
+    fn display_chain<'a>(&'a self) -> DisplayChain<'a, Self> {
-        Display(self)
+        DisplayChain(self)
    }
    /// Extends the error chain with a new entry.
    fn chain_err<F, EK>(self, error: F) -> Self
        where F: FnOnce() -> EK,
              EK: Into<Self::ErrorKind>;
    /// Creates an error from its parts.
    #[doc(hidden)]
    fn new(kind: Self::ErrorKind, state: State) -> Self where Self: Sized;
@ -465,12 +670,13 @@ pub trait ChainedError: error::Error + Send + 'static {
 /// A struct which formats an error for output.
 #[derive(Debug)]
-pub struct Display<'a, T: 'a + ?Sized>(&'a T);
+pub struct DisplayChain<'a, T: 'a + ?Sized>(&'a T);
-impl<'a, T> fmt::Display for Display<'a, T>
+impl<'a, T> fmt::Display for DisplayChain<'a, T>
    where T: ChainedError
 {
    fn fmt(&self, fmt: &mut fmt::Formatter) -> fmt::Result {
        // Keep `try!` for 1.10 support
        try!(writeln!(fmt, "Error: {}", self.0));
        for e in self.0.iter().skip(1) {
--- a/third_party/rust/error-chain/src/quick_main.rs
+++ b/third_party/rust/error-chain/src/quick_main.rs
@ -1,4 +1,4 @@
-/// Convenient wrapper to be able to use `try!` and such in the main. You can
+/// Convenient wrapper to be able to use `?` and such in the main. You can
 /// use it with a separated function:
 ///
 /// ```
@ -47,7 +47,7 @@ macro_rules! quick_main {
            ::std::process::exit(match $main() {
                Ok(ret) => $crate::ExitCode::code(ret),
                Err(ref e) => {
-                    write!(&mut ::std::io::stderr(), "{}", $crate::ChainedError::display(e))
+                    write!(&mut ::std::io::stderr(), "{}", $crate::ChainedError::display_chain(e))
                        .expect("Error writing to stderr");
                    1
@ -65,9 +65,13 @@ pub trait ExitCode {
 }
 impl ExitCode for i32 {
-    fn code(self) -> i32 { self }
+    fn code(self) -> i32 {
        self
    }
 }
 impl ExitCode for () {
-    fn code(self) -> i32 { 0 }
+    fn code(self) -> i32 {
        0
    }
 }
--- a/third_party/rust/error-chain/tests/quick_main.rs
+++ b/third_party/rust/error-chain/tests/quick_main.rs
@ -24,7 +24,5 @@ mod i32 {
 mod closure {
    use super::*;
-    quick_main!(|| -> Result<()> {
+    quick_main!(|| -> Result<()> { Ok(()) });
        Ok(())
    });
 }
--- a/third_party/rust/error-chain/tests/tests.rs
+++ b/third_party/rust/error-chain/tests/tests.rs
@ -1,7 +1,4 @@
 #![allow(dead_code)]
 //#![feature(trace_macros)]
 //
 //trace_macros!(true);
 #[macro_use]
 extern crate error_chain;
@ -197,41 +194,35 @@ fn order_test_8() {
 #[test]
 fn empty() {
-    error_chain! { };
+    error_chain!{};
 }
 #[test]
 #[cfg(feature = "backtrace")]
 fn has_backtrace_depending_on_env() {
-    use std::env;
+    use std::process::Command;
    use std::path::Path;
-    error_chain! {
+    let cmd_path = if cfg!(windows) {
-        types {}
+        Path::new("./target/debug/has_backtrace.exe")
-        links {}
+    } else {
-        foreign_links {}
+        Path::new("./target/debug/has_backtrace")
-        errors {
+    };
-            MyError
+    let mut cmd = Command::new(cmd_path);
        }
    }
    let original_value = env::var_os("RUST_BACKTRACE");
    // missing RUST_BACKTRACE and RUST_BACKTRACE=0
-    env::remove_var("RUST_BACKTRACE");
+    cmd.env_remove("RUST_BACKTRACE");
-    let err = Error::from(ErrorKind::MyError);
+    assert_eq!(cmd.status().unwrap().code().unwrap(), 0);
-    assert!(err.backtrace().is_none());
+
-    env::set_var("RUST_BACKTRACE", "0");
+    cmd.env("RUST_BACKTRACE", "0");
-    let err = Error::from(ErrorKind::MyError);
+    assert_eq!(cmd.status().unwrap().code().unwrap(), 0);
    assert!(err.backtrace().is_none());
    // RUST_BACKTRACE set to anything but 0
-    env::set_var("RUST_BACKTRACE", "yes");
+    cmd.env("RUST_BACKTRACE", "yes");
-    let err = Error::from(ErrorKind::MyError);
+    assert_eq!(cmd.status().unwrap().code().unwrap(), 1);
    assert!(err.backtrace().is_some());
-    if let Some(var) = original_value {
+    cmd.env("RUST_BACKTRACE", "1");
-        env::set_var("RUST_BACKTRACE", var);
+    assert_eq!(cmd.status().unwrap().code().unwrap(), 1);
    }
 }
 #[test]
@ -251,10 +242,30 @@ fn chain_err() {
    let _: Result<()> = Err(Error::from_kind(ErrorKind::Test)).chain_err(|| "");
 }
 /// Verify that an error chain is extended one by `Error::chain_err`, with
 /// the new error added to the end.
 #[test]
 fn error_chain_err() {
    error_chain! {
        errors {
            Test
        }
    }
    let base = Error::from(ErrorKind::Test);
    let ext = base.chain_err(|| "Test passes");
    if let Error(ErrorKind::Msg(_), _) = ext {
        // pass
    } else {
        panic!("The error should be wrapped. {:?}", ext);
    }
 }
 #[test]
 fn links() {
    mod test {
-        error_chain! {}
+        error_chain!{}
    }
    error_chain! {
@ -273,7 +284,7 @@ mod foreign_link_test {
    // signature of the public foreign_link_error_path
    #[derive(Debug)]
    pub struct ForeignError {
-        cause: ForeignErrorCause
+        cause: ForeignErrorCause,
    }
    impl ::std::error::Error for ForeignError {
@ -281,7 +292,9 @@ mod foreign_link_test {
            "Foreign error description"
        }
-        fn cause(&self) -> Option<&::std::error::Error> { Some(&self.cause) }
+        fn cause(&self) -> Option<&::std::error::Error> {
            Some(&self.cause)
        }
    }
    impl fmt::Display for ForeignError {
@ -298,7 +311,9 @@ mod foreign_link_test {
            "Foreign error cause description"
        }
-        fn cause(&self) -> Option<&::std::error::Error> { None }
+        fn cause(&self) -> Option<&::std::error::Error> {
            None
        }
    }
    impl fmt::Display for ForeignErrorCause {
@ -322,43 +337,32 @@ mod foreign_link_test {
    #[test]
    fn display_underlying_error() {
        let chained_error = try_foreign_error().err().unwrap();
-        assert_eq!(
+        assert_eq!(format!("{}", ForeignError { cause: ForeignErrorCause {} }),
-            format!("{}", ForeignError{ cause: ForeignErrorCause{} }),
+                   format!("{}", chained_error));
            format!("{}", chained_error)
        );
    }
    #[test]
    fn finds_cause() {
        let chained_error = try_foreign_error().err().unwrap();
-        assert_eq!(
+        assert_eq!(format!("{}", ForeignErrorCause {}),
-            format!("{}", ForeignErrorCause{}),
+                   format!("{}", ::std::error::Error::cause(&chained_error).unwrap()));
            format!("{}", ::std::error::Error::cause(&chained_error).unwrap())
        );
    }
    #[test]
    fn iterates() {
        let chained_error = try_foreign_error().err().unwrap();
        let mut error_iter = chained_error.iter();
-        assert_eq!(
+        assert!(!format!("{:?}", error_iter).is_empty());
-            format!("{}", ForeignError{ cause: ForeignErrorCause{} }),
+        assert_eq!(format!("{}", ForeignError { cause: ForeignErrorCause {} }),
-            format!("{}", error_iter.next().unwrap())
+                   format!("{}", error_iter.next().unwrap()));
-        );
+        assert_eq!(format!("{}", ForeignErrorCause {}),
-        assert_eq!(
+                   format!("{}", error_iter.next().unwrap()));
-            format!("{}", ForeignErrorCause{}),
+        assert_eq!(format!("{:?}", None as Option<&::std::error::Error>),
-            format!("{}", error_iter.next().unwrap())
+                   format!("{:?}", error_iter.next()));
        );
        assert_eq!(
            format!("{:?}", None as Option<&::std::error::Error>),
            format!("{:?}", error_iter.next())
        );
    }
    fn try_foreign_error() -> Result<()> {
-        try!(Err(ForeignError{
+        Err(ForeignError { cause: ForeignErrorCause {} })?;
            cause: ForeignErrorCause{}
        }));
        Ok(())
    }
 }
@ -370,9 +374,7 @@ mod attributes_test {
    #[cfg(not(test))]
    mod inner {
-        error_chain! {
+        error_chain!{}
        }
    }
    error_chain! {
@ -420,7 +422,7 @@ fn without_result() {
 #[test]
 fn documentation() {
    mod inner {
-        error_chain! {}
+        error_chain!{}
    }
    error_chain! {
@ -444,13 +446,13 @@ mod multiple_error_same_mod {
            MyError, MyErrorKind, MyResultExt, MyResult;
        }
    }
-    error_chain! {}
+    error_chain!{}
 }
 #[doc(test)]
 #[deny(dead_code)]
 mod allow_dead_code {
-    error_chain! {}
+    error_chain!{}
 }
 // Make sure links actually work!
@ -483,8 +485,8 @@ fn error_patterns() {
    // Tuples look nice when matching errors
    match Error::from("Test") {
-        Error(ErrorKind::Msg(_), _) => {
+        Error(ErrorKind::Msg(_), _) => {},
-        }
+        _ => {},
    }
 }
@ -559,7 +561,7 @@ fn types_declarations() {
 #[test]
 /// Calling chain_err over a `Result` containing an error to get a chained error
-//// and constructing a MyError directly, passing it an error should be equivalent.
+/// and constructing a MyError directly, passing it an error should be equivalent.
 fn rewrapping() {
    use std::env::VarError::{self, NotPresent, NotUnicode};
@ -587,9 +589,40 @@ fn rewrapping() {
        NotUnicode(_) => Err(e).chain_err(|| "env var was borkæ–‡å—åŒ–ã"),
    });
-    assert_eq!(
+    assert_eq!(format!("{}", our_error_a.unwrap_err()),
-        format!("{}", our_error_a.unwrap_err()),
+               format!("{}", our_error_b.unwrap_err()));
        format!("{}", our_error_b.unwrap_err())
    );
 }
 #[test]
 fn comma_in_errors_impl() {
    error_chain! {
        links { }
        foreign_links { }
        errors {
            HttpStatus(e: u32) {
                description("http request returned an unsuccessful status code"),
                display("http request returned an unsuccessful status code: {}", e)
            }
        }
    };
 }
 #[test]
 fn trailing_comma_in_errors_impl() {
    error_chain! {
        links { }
        foreign_links { }
        errors {
            HttpStatus(e: u32) {
                description("http request returned an unsuccessful status code"),
                display("http request returned an unsuccessful status code: {}", e),
            }
        }
    };
 }
--- a/toolkit/library/gtest/rust/Cargo.lock
+++ b/toolkit/library/gtest/rust/Cargo.lock
@ -50,7 +50,7 @@ dependencies = [
 "bincode 0.8.0 (registry+https://github.com/rust-lang/crates.io-index)",
 "bytes 0.4.5 (registry+https://github.com/rust-lang/crates.io-index)",
 "cubeb-core 0.1.0",
- "error-chain 0.10.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "error-chain 0.11.0 (registry+https://github.com/rust-lang/crates.io-index)",
 "libc 0.2.33 (registry+https://github.com/rust-lang/crates.io-index)",
 "log 0.3.8 (registry+https://github.com/rust-lang/crates.io-index)",
 "memmap 0.5.2 (registry+https://github.com/rust-lang/crates.io-index)",
@ -79,7 +79,7 @@ dependencies = [
 "bytes 0.4.5 (registry+https://github.com/rust-lang/crates.io-index)",
 "cubeb 0.3.0",
 "cubeb-core 0.1.0",
- "error-chain 0.10.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "error-chain 0.11.0 (registry+https://github.com/rust-lang/crates.io-index)",
 "lazycell 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
 "libc 0.2.33 (registry+https://github.com/rust-lang/crates.io-index)",
 "log 0.3.8 (registry+https://github.com/rust-lang/crates.io-index)",
@ -440,7 +440,7 @@ dependencies = [
 [[package]]
 name = "error-chain"
-version = "0.10.0"
+version = "0.11.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 [[package]]
@ -1592,7 +1592,7 @@ dependencies = [
 "checksum encoding_c 0.8.0 (registry+https://github.com/rust-lang/crates.io-index)" = "93ec52324ca72f423237a413ca0e1c60654c8b3d0934fcd5fd888508dfcc4ba7"
 "checksum encoding_rs 0.7.1 (registry+https://github.com/rust-lang/crates.io-index)" = "f5215aabf22b83153be3ee44dfe3f940214541b2ce13d419c55e7a115c8c51a9"
 "checksum env_logger 0.4.3 (registry+https://github.com/rust-lang/crates.io-index)" = "3ddf21e73e016298f5cb37d6ef8e8da8e39f91f9ec8b0df44b7deb16a9f8cd5b"
-"checksum error-chain 0.10.0 (registry+https://github.com/rust-lang/crates.io-index)" = "d9435d864e017c3c6afeac1654189b06cdb491cf2ff73dbf0d73b0f292f42ff8"
+"checksum error-chain 0.11.0 (registry+https://github.com/rust-lang/crates.io-index)" = "ff511d5dc435d703f4971bc399647c9bc38e20cb41452e3b9feb4765419ed3f3"
 "checksum euclid 0.16.0 (registry+https://github.com/rust-lang/crates.io-index)" = "926c639bfdff1f3063f76bb66245f6d2b691aa20fdbaabecc38b2947a13a4eba"
 "checksum fnv 1.0.5 (registry+https://github.com/rust-lang/crates.io-index)" = "6cc484842f1e2884faf56f529f960cc12ad8c71ce96cc7abba0a067c98fee344"
 "checksum foreign-types 0.3.0 (registry+https://github.com/rust-lang/crates.io-index)" = "5ebc04f19019fff1f2d627b5581574ead502f80c48c88900575a46e0840fe5d0"
--- a/toolkit/library/rust/Cargo.lock
+++ b/toolkit/library/rust/Cargo.lock
@ -50,7 +50,7 @@ dependencies = [
 "bincode 0.8.0 (registry+https://github.com/rust-lang/crates.io-index)",
 "bytes 0.4.5 (registry+https://github.com/rust-lang/crates.io-index)",
 "cubeb-core 0.1.0",
- "error-chain 0.10.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "error-chain 0.11.0 (registry+https://github.com/rust-lang/crates.io-index)",
 "libc 0.2.33 (registry+https://github.com/rust-lang/crates.io-index)",
 "log 0.3.8 (registry+https://github.com/rust-lang/crates.io-index)",
 "memmap 0.5.2 (registry+https://github.com/rust-lang/crates.io-index)",
@ -79,7 +79,7 @@ dependencies = [
 "bytes 0.4.5 (registry+https://github.com/rust-lang/crates.io-index)",
 "cubeb 0.3.0",
 "cubeb-core 0.1.0",
- "error-chain 0.10.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "error-chain 0.11.0 (registry+https://github.com/rust-lang/crates.io-index)",
 "lazycell 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
 "libc 0.2.33 (registry+https://github.com/rust-lang/crates.io-index)",
 "log 0.3.8 (registry+https://github.com/rust-lang/crates.io-index)",
@ -440,7 +440,7 @@ dependencies = [
 [[package]]
 name = "error-chain"
-version = "0.10.0"
+version = "0.11.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 [[package]]
@ -1604,7 +1604,7 @@ dependencies = [
 "checksum encoding_c 0.8.0 (registry+https://github.com/rust-lang/crates.io-index)" = "93ec52324ca72f423237a413ca0e1c60654c8b3d0934fcd5fd888508dfcc4ba7"
 "checksum encoding_rs 0.7.1 (registry+https://github.com/rust-lang/crates.io-index)" = "f5215aabf22b83153be3ee44dfe3f940214541b2ce13d419c55e7a115c8c51a9"
 "checksum env_logger 0.4.3 (registry+https://github.com/rust-lang/crates.io-index)" = "3ddf21e73e016298f5cb37d6ef8e8da8e39f91f9ec8b0df44b7deb16a9f8cd5b"
-"checksum error-chain 0.10.0 (registry+https://github.com/rust-lang/crates.io-index)" = "d9435d864e017c3c6afeac1654189b06cdb491cf2ff73dbf0d73b0f292f42ff8"
+"checksum error-chain 0.11.0 (registry+https://github.com/rust-lang/crates.io-index)" = "ff511d5dc435d703f4971bc399647c9bc38e20cb41452e3b9feb4765419ed3f3"
 "checksum euclid 0.16.0 (registry+https://github.com/rust-lang/crates.io-index)" = "926c639bfdff1f3063f76bb66245f6d2b691aa20fdbaabecc38b2947a13a4eba"
 "checksum fnv 1.0.5 (registry+https://github.com/rust-lang/crates.io-index)" = "6cc484842f1e2884faf56f529f960cc12ad8c71ce96cc7abba0a067c98fee344"
 "checksum foreign-types 0.3.0 (registry+https://github.com/rust-lang/crates.io-index)" = "5ebc04f19019fff1f2d627b5581574ead502f80c48c88900575a46e0840fe5d0"
		`@ -1 +1 @@`
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