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Updated RELEASES.md for 1.23.0
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Aaron Power
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RELEASES.md
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RELEASES.md
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Version 1.23.0 (2018-01-04)
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==========================
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Language
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--------
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- [Fixed displaying duplicate errors on some trait bounds.][45772]
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Compiler
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--------
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- [Enabled `TrapUnreachable` in LLVM which should prevent some cases of
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undefined behaviour.][45920]
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- [rustc now suggests renaming import if names clash.][45660]
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- [Display errors/warnings correctly when there are zero-width or
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wide characters.][45711]
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- [rustc now uses subtyping on the left hand side of binary operations.][45435]
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Which should fix some confusing errors in some operations.
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- [Bumped the minimum LLVM to 3.9][45326]
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- [rustc now avoids unnecessary copies of arguments that are
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simple bindings][45380] This should improve memory usage on average by 5-10%.
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- [Updated musl used to build musl rustc to 1.1.17][45393]
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Libraries
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---------
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- [impl `From<T>` for `Mutex<T>` and `RwLock<T>`][46082]
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- [Allow a trailling comma in `assert_eq/ne` macro][45887]
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- [Implement Hash for raw pointers to unsized types][45483]
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- [impl `From<*mut T>` for `AtomicPtr<T>`][45610]
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- [impl `From<{number_size}>` for `Atomic{number_size}`][45610] eg. `From<u8>`
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for `AtomicU8`.
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- [Removed the `T: Sync` requirement for `RwLock<T>: Send`][45267]
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- [Removed `T: Sized` requirement for `<*const T>::as_ref`
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and `<*const T>::as_mut`][44932]
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- [Optimized `Thread::{park, unpark}` implementation][45524]
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- [Improved `SliceExt::binary_search` performance.][45333]
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- [Optimized `Read::read_to_end`.][46050] This increase file read speed and for
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small files reduce the number of syscalls.
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Stabilized APIs
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---------------
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Cargo
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-----
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- [Cargo now supports alternative registries][cargo/4506]
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- [Cargo now supports uninstallation of multiple packages][cargo/4561]
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eg. `cargo uninstall foo bar` uninstalls `foo` and `bar`.
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- [Added unit test checking to `cargo check`][cargo/4592]
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- [Cargo now lets you install a specific version
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using `cargo install --version`][cargo/4637]
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Misc
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----
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- [Releases now ship with the Cargo book documentation.][45692]
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- [rustdoc now prints rendering warnings on every run.][45324]
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- [Release tarballs now come with rustfmt][45903]
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Compatibility Notes
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-------------------
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- [`fmt::Arguments` can no longer be shared across threads.][45198]
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- [Changes have been made to type equality to make it more correct,
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in rare cases this could break some code.][45853] [Tracking issue for
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further information][45852]
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- [Changed how closures are stored, as a result of this change you can no longer
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have a situation where a closure directly calls itself.][45879]
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- [`char::escape_debug` now uses Unicode 10 over 9.][45571]
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- [Upgraded Android SDK to 27, and NDK to r15c.][45580] This drops support for
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Android 9, the minimum supported version is Android 14.
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- [Refactored type memory layouts and ABIs.][45225] This reduce code generated
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for a lot of types.
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[44932]: https://github.com/rust-lang/rust/pull/44932
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[45198]: https://github.com/rust-lang/rust/pull/45198
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[45225]: https://github.com/rust-lang/rust/pull/45225
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[45267]: https://github.com/rust-lang/rust/pull/45267
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[45324]: https://github.com/rust-lang/rust/pull/45324
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[45326]: https://github.com/rust-lang/rust/pull/45326
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[45333]: https://github.com/rust-lang/rust/pull/45333
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[45380]: https://github.com/rust-lang/rust/pull/45380
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[45393]: https://github.com/rust-lang/rust/pull/45393
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[45435]: https://github.com/rust-lang/rust/pull/45435
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[45483]: https://github.com/rust-lang/rust/pull/45483
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[45524]: https://github.com/rust-lang/rust/pull/45524
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[45571]: https://github.com/rust-lang/rust/pull/45571
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[45580]: https://github.com/rust-lang/rust/pull/45580
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[45610]: https://github.com/rust-lang/rust/pull/45610
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[45660]: https://github.com/rust-lang/rust/pull/45660
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[45692]: https://github.com/rust-lang/rust/pull/45692
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[45711]: https://github.com/rust-lang/rust/pull/45711
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[45772]: https://github.com/rust-lang/rust/pull/45772
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[45852]: https://github.com/rust-lang/rust/issues/45852
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[45853]: https://github.com/rust-lang/rust/pull/45853
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[45879]: https://github.com/rust-lang/rust/pull/45879
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[45887]: https://github.com/rust-lang/rust/pull/45887
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[45903]: https://github.com/rust-lang/rust/pull/45903
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[45920]: https://github.com/rust-lang/rust/pull/45920
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[46050]: https://github.com/rust-lang/rust/pull/46050
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[46082]: https://github.com/rust-lang/rust/pull/46082
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[cargo/4506]: https://github.com/rust-lang/cargo/pull/4506
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[cargo/4561]: https://github.com/rust-lang/cargo/pull/4561
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[cargo/4592]: https://github.com/rust-lang/cargo/pull/4592
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[cargo/4637]: https://github.com/rust-lang/cargo/pull/4637
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Version 1.22.1 (2017-11-22)
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==========================
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