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Updated release notes for 1.20
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Aaron Power
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RELEASES.md
138
RELEASES.md
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Version 1.20.0 (2017-08-31)
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===========================
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Language
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--------
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- [Associated constants in traits is now stabilised.][42809]
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- [A lot of macro bugs are now fixed.][42913]
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Compiler
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--------
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- [Struct fields are now properly to the expected field type.][42807]
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- [Enabled wasm LLVM backend][42571] WASM can now be built with the
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`wasm32-experimental-emscripten` target.
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- [Changed some of the error messages to be more helpful.][42033]
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- [Add support for RELRO(RELocation Read-Only) for platforms that support
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it.][43170]
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- [rustc now reports the total number of errors on compilation failure][43015]
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previously this was only the number of errors in the pass that failed.
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- [Expansion in rustc has been sped up 29x.][42533]
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- [added `msp430-none-elf` target.][43099]
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- [rustc will now suggest one-argument enum variant to fix type mismatch when
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applicable][43178]
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- [Fixes backtraces on Redox][43228]
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- [rustc now identifies different versions of same crate when absolute paths of
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different types match in an error message.][42826]
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Libraries
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---------
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- [`Ref`, `RefMut`, `MutexGuard`, `RwLockReadGuard`, `RwLockWriteGuard`
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now impl `fmt::Display` & `fmt::Debug`.][42822]
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- [Relaxed Debug constraints on {HashMap,BTreeMap}::{Keys,Values}.][42854]
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- [Implement `PartialEq`, `Eq`, `PartialOrd`, `Ord`, `Debug`, `Hash` for unsized
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tuples.][43011]
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- [Impl `Clone` for `DefaultHasher`.][42799]
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- [Implement `Sync` for `SyncSender`.][42397]
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- [Fixed how `{f32, f64}::{is_sign_negative, is_sign_positive}` handles
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NaN.][42431]
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- [allow messages in the `unimplemented!()` macro.][42155]
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ie. `unimplemented!("Waiting for 1.21 to be stable")`
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- [`char`now impls `FromStr`.][42271]
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- [support pub(restricted) in thread_local! (round 2)][43185]
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- [Upgrade to Unicode 10.0.0][42999]
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- [Reimplemented `{f32, f64}::{min, max}` in Rust instead of using CMath.][42430]
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- [Skip the main thread's manual stack guard on Linux][43072]
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- [Iterator::nth for `ops::{Range, RangeFrom}` is now done in O(1) time][43077]
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- [`#cfg[align(N)]` attribute max number is now 2^31 - 1.][43097] This was
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previously 2^15.
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- [`{OsStr, Path}::Display` now avoids allocations where possible][42613]
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Stabilized APIs
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---------------
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- [`Chain::get_mut`]
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- [`Chain::get_ref`]
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- [`Chain::into_inner`]
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- [`Take::get_mut`]
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- [`Take::get_ref`]
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- [`f32::from_bits`]
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- [`f32::to_bits`]
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- [`f64::from_bits`]
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- [`f64::to_bits`]
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- [`slice::sort_unstable`]
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- [`slice::sort_unstable_by`]
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- [`slice::sort_unstable_by_key`]
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Cargo
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-----
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- [Cargo API token location moved from `~/.cargo/config` to
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`~/cargo/credentials`.][cargo/3978]
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- [Cargo will now build multiple `main.rs` binaries in different
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directories.][cargo/4214] ie. Having `src/server/main.rs` and
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`src/client/main.rs` generates `target/debug/server` and `target/debug/client`
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- [You can now specify version of a binary when installed through
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`cargo install` using `--vers`.][cargo/4229]
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- [Added `--no-fail-fast` flag to cargo to run all benchmarks regardless of
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failure.][cargo/4248]
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- [Changed the convention around which file is the crate root.][cargo/4259]
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- [The `include`/`exclude` property in `Cargo.toml` now accepts gitignore paths
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instead of glob patterns][cargo/4270]. Glob patterns are now deprecated.
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Compatibility Notes
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-------------------
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- [Functions with `'static` in their return types will now not be as usable as
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if they were using lifetime parameters instead.][42417]
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[42033]: https://github.com/rust-lang/rust/pull/42033
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[42155]: https://github.com/rust-lang/rust/pull/42155
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[42271]: https://github.com/rust-lang/rust/pull/42271
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[42397]: https://github.com/rust-lang/rust/pull/42397
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[42417]: https://github.com/rust-lang/rust/pull/42417
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[42430]: https://github.com/rust-lang/rust/pull/42430
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[42431]: https://github.com/rust-lang/rust/pull/42431
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[42533]: https://github.com/rust-lang/rust/pull/42533
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[42571]: https://github.com/rust-lang/rust/pull/42571
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[42613]: https://github.com/rust-lang/rust/pull/42613
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[42799]: https://github.com/rust-lang/rust/pull/42799
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[42807]: https://github.com/rust-lang/rust/pull/42807
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[42809]: https://github.com/rust-lang/rust/pull/42809
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[42822]: https://github.com/rust-lang/rust/pull/42822
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[42826]: https://github.com/rust-lang/rust/pull/42826
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[42854]: https://github.com/rust-lang/rust/pull/42854
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[42913]: https://github.com/rust-lang/rust/pull/42913
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[42999]: https://github.com/rust-lang/rust/pull/42999
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[43011]: https://github.com/rust-lang/rust/pull/43011
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[43015]: https://github.com/rust-lang/rust/pull/43015
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[43072]: https://github.com/rust-lang/rust/pull/43072
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[43077]: https://github.com/rust-lang/rust/pull/43077
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[43097]: https://github.com/rust-lang/rust/pull/43097
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[43099]: https://github.com/rust-lang/rust/pull/43099
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[43170]: https://github.com/rust-lang/rust/pull/43170
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[43178]: https://github.com/rust-lang/rust/pull/43178
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[43185]: https://github.com/rust-lang/rust/pull/43185
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[43228]: https://github.com/rust-lang/rust/pull/43228
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[cargo/3978]: https://github.com/rust-lang/cargo/pull/3978
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[cargo/4214]: https://github.com/rust-lang/cargo/pull/4214
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[cargo/4229]: https://github.com/rust-lang/cargo/pull/4229
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[cargo/4248]: https://github.com/rust-lang/cargo/pull/4248
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[cargo/4259]: https://github.com/rust-lang/cargo/pull/4259
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[cargo/4270]: https://github.com/rust-lang/cargo/pull/4270
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[`Chain::get_mut`]: https://doc.rust-lang.org/std/io/struct.Chain.html#method.get_mut
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[`Chain::get_ref`]: https://doc.rust-lang.org/std/io/struct.Chain.html#method.get_ref
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[`Chain::into_inner`]: https://doc.rust-lang.org/std/io/struct.Chain.html#method.into_inner
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[`Take::get_mut`]: https://doc.rust-lang.org/std/io/struct.Take.html#method.get_mut
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[`Take::get_ref`]: https://doc.rust-lang.org/std/io/struct.Take.html#method.get_ref
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[`f32::from_bits`]: https://doc.rust-lang.org/std/primitive.f32.html#method.from_bits
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[`f32::to_bits`]: https://doc.rust-lang.org/std/primitive.f32.html#method.to_bits
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[`f64::from_bits`]: https://doc.rust-lang.org/std/primitive.f64.html#method.from_bits
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[`f64::to_bits`]: https://doc.rust-lang.org/std/primitive.f64.html#method.to_bits
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[`slice::sort_unstable_by_key`]: https://doc.rust-lang.org/std/primitive.slice.html#method.sort_unstable_by_key
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[`slice::sort_unstable_by`]: https://doc.rust-lang.org/std/primitive.slice.html#method.sort_unstable_by
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[`slice::sort_unstable`]: https://doc.rust-lang.org/std/primitive.slice.html#method.sort_unstable
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Version 1.19.0 (2017-07-20)
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===========================
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@ -1679,7 +1815,7 @@ Tooling
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* [Test binaries now support a `--test-threads` argument to specify the number
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of threads used to run tests, and which acts the same as the
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`RUST_TEST_THREADS` environment variable](https://github.com/rust-lang/rust/pull/35414)
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`RUST_TEST_THREADS` environment variable](https://github.com/rust-lang/rust/pull/35414)
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* [The test runner now emits a warning when tests run over 60 seconds](https://github.com/rust-lang/rust/pull/35405)
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* [rustdoc: Fix methods in search results](https://github.com/rust-lang/rust/pull/34752)
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* [`rust-lldb` warns about unsupported versions of LLDB](https://github.com/rust-lang/rust/pull/34646)
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