Updated RELEASES.md for 1.23.0 #46327
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| Version 1.23.0 (2018-01-04) | ||
| ========================== | ||
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| Language | ||
| -------- | ||
| - [Arbitrary `auto` traits are now permitted in trait objects.][45772] | ||
| - [rustc now uses subtyping on the left hand side of binary operations.][45435] | ||
| Which should fix some confusing errors in some operations. | ||
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| Compiler | ||
| -------- | ||
| - [Enabled `TrapUnreachable` in LLVM which should mitigate the impact of | ||
| undefined behaviour.][45920] | ||
| - [rustc now suggests renaming import if names clash.][45660] | ||
| - [Display errors/warnings correctly when there are zero-width or | ||
| wide characters.][45711] | ||
| - [rustc now avoids unnecessary copies of arguments that are | ||
| simple bindings][45380] This should improve memory usage on average by 5-10%. | ||
| - [Updated musl used to build musl rustc to 1.1.17][45393] | ||
| - [Refactored type memory layouts and ABIs.][45225] This will reduce | ||
|
There was a problem hiding this comment. If #46925 is merged, please remove this item. |
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| memory size for some types. Eg. `io::Result<()>` is now 16 bytes | ||
| where it was previously 24. | ||
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| Libraries | ||
| --------- | ||
| - [Allow a trailing comma in `assert_eq/ne` macro][45887] | ||
| - [Implement Hash for raw pointers to unsized types][45483] | ||
| - [impl `From<*mut T>` for `AtomicPtr<T>`][45610] | ||
| - [impl `From<usize/isize>` for `AtomicUsize/AtomicIsize`.][45610] | ||
| - [Removed the `T: Sync` requirement for `RwLock<T>: Send`][45267] | ||
| - [Removed `T: Sized` requirement for `{<*const T>, <*mut T>}::as_ref` | ||
| and `<*mut T>::as_mut`][44932] | ||
| - [Optimized `Thread::{park, unpark}` implementation][45524] | ||
| - [Improved `SliceExt::binary_search` performance.][45333] | ||
| - [impl `FromIterator<()>` for `()`][45379] | ||
| - [Copied `AsciiExt` trait methods to primitive types.][44042] Use of `AsciiExt` | ||
| is now deprecated. | ||
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| Stabilized APIs | ||
| --------------- | ||
|
There was a problem hiding this comment. APIs marked as
There was a problem hiding this comment. #45990 didn't make it into 1.23.0. |
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| Cargo | ||
| ----- | ||
| - [Cargo now supports alternative registries][cargo/4506] | ||
| - [Cargo now supports uninstallation of multiple packages][cargo/4561] | ||
| eg. `cargo uninstall foo bar` uninstalls `foo` and `bar`. | ||
| - [Added unit test checking to `cargo check`][cargo/4592] | ||
| - [Cargo now lets you install a specific version | ||
| using `cargo install --version`][cargo/4637] | ||
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| Misc | ||
| ---- | ||
| - [Releases now ship with the Cargo book documentation.][45692] | ||
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There was a problem hiding this comment. This might have to get yanked if #46195 isn't resolved |
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| - [rustdoc now prints rendering warnings on every run.][45324] | ||
| - [Release tarballs now come with rustfmt][45903] | ||
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| Compatibility Notes | ||
| ------------------- | ||
| - [Changes have been made to type equality to make it more correct, | ||
| in rare cases this could break some code.][45853] [Tracking issue for | ||
| further information][45852] | ||
| - [`char::escape_debug` now uses Unicode 10 over 9.][45571] | ||
| - [Upgraded Android SDK to 27, and NDK to r15c.][45580] This drops support for | ||
| Android 9, the minimum supported version is Android 14. | ||
| - [Bumped the minimum LLVM to 3.9][45326] | ||
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| [44042]: https://github.com/rust-lang/rust/pull/44042 | ||
| [44932]: https://github.com/rust-lang/rust/pull/44932 | ||
| [45225]: https://github.com/rust-lang/rust/pull/45225 | ||
| [45267]: https://github.com/rust-lang/rust/pull/45267 | ||
| [45324]: https://github.com/rust-lang/rust/pull/45324 | ||
| [45326]: https://github.com/rust-lang/rust/pull/45326 | ||
| [45333]: https://github.com/rust-lang/rust/pull/45333 | ||
| [45379]: https://github.com/rust-lang/rust/pull/45379 | ||
| [45380]: https://github.com/rust-lang/rust/pull/45380 | ||
| [45393]: https://github.com/rust-lang/rust/pull/45393 | ||
| [45435]: https://github.com/rust-lang/rust/pull/45435 | ||
| [45483]: https://github.com/rust-lang/rust/pull/45483 | ||
| [45524]: https://github.com/rust-lang/rust/pull/45524 | ||
| [45571]: https://github.com/rust-lang/rust/pull/45571 | ||
| [45580]: https://github.com/rust-lang/rust/pull/45580 | ||
| [45610]: https://github.com/rust-lang/rust/pull/45610 | ||
| [45660]: https://github.com/rust-lang/rust/pull/45660 | ||
| [45692]: https://github.com/rust-lang/rust/pull/45692 | ||
| [45711]: https://github.com/rust-lang/rust/pull/45711 | ||
| [45772]: https://github.com/rust-lang/rust/pull/45772 | ||
| [45852]: https://github.com/rust-lang/rust/issues/45852 | ||
| [45853]: https://github.com/rust-lang/rust/pull/45853 | ||
| [45887]: https://github.com/rust-lang/rust/pull/45887 | ||
| [45903]: https://github.com/rust-lang/rust/pull/45903 | ||
| [45920]: https://github.com/rust-lang/rust/pull/45920 | ||
| [cargo/4506]: https://github.com/rust-lang/cargo/pull/4506 | ||
| [cargo/4561]: https://github.com/rust-lang/cargo/pull/4561 | ||
| [cargo/4592]: https://github.com/rust-lang/cargo/pull/4592 | ||
| [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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It would be more accurate to say that it mitigates the impact of the UB. This change doesn't make any programs defined that were previously UB, it just makes it more likely they trap at runtime instead of executing arbitrary code.