From a924b8a8fbb59d704082437d2aa2e445ec6da14b Mon Sep 17 00:00:00 2001 From: Mark Rousskov Date: Sat, 17 Sep 2022 13:45:51 -0400 Subject: [PATCH] Release notes update Co-authored-by: Tyler Mandry Co-authored-by: Josh Triplett --- RELEASES.md | 152 ++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 152 insertions(+) diff --git a/RELEASES.md b/RELEASES.md index 89fd4f2703b..51c25030cad 100644 --- a/RELEASES.md +++ b/RELEASES.md @@ -1,3 +1,155 @@ +Version 1.64.0 (2022-09-22) +=========================== + +Language +-------- +- [make `const_err` show up in future breakage reports](https://github.com/rust-lang/rust/pull/97743/) +- [allow unions with mutable references and tuples of allowed types](https://github.com/rust-lang/rust/pull/97995/) +- It is now considered valid to deallocate memory pointed to by a shared reference `&T` [if every byte in `T` is inside an `UnsafeCell`](https://github.com/rust-lang/rust/pull/98017/) +- Unused tuple struct fields are now warned against in an allow-by-default lint, [`unused_tuple_struct_fields`](https://github.com/rust-lang/rust/pull/95977/), similar to the existing warning for unused struct fields. This lint will become warn-by-default in the future. + +Compiler +-------- +- The minimum required versions for all `-linux-gnu` targets are now at least kernel 3.2 and glibc 2.17, for targets that previously supported older versions: [Increase the minimum linux-gnu versions](https://github.com/rust-lang/rust/pull/95026/) +- [Keep unstable target features for asm feature checking](https://github.com/rust-lang/rust/pull/99155/) +- [Add Nintendo Switch as tier 3 target](https://github.com/rust-lang/rust/pull/88991/) + - Refer to Rust's [platform support page][platform-support-doc] for more + information on Rust's tiered platform support. +- [Only compile #[used] as llvm.compiler.used for ELF targets](https://github.com/rust-lang/rust/pull/93718/) +- [sess: stabilize `-Zterminal-width` as `--diagnostic-width`](https://github.com/rust-lang/rust/pull/95635/) +- [Fix repr(align) enum handling](https://github.com/rust-lang/rust/pull/96814/) +- [Suggest defining variable as mutable on `&mut _` type mismatch in pats](https://github.com/rust-lang/rust/pull/98431/) +- [Emit warning when named arguments are used positionally in format](https://github.com/rust-lang/rust/pull/98580/) +- [Add support for link-flavor rust-lld for iOS, tvOS and watchOS](https://github.com/rust-lang/rust/pull/98771/) +- [Do not mention private types from other crates as impl candidates](https://github.com/rust-lang/rust/pull/99091/) + +Libraries +--------- +- [Implement network primitives with ideal Rust layout, not C system layout](https://github.com/rust-lang/rust/pull/78802/) +- [Remove restrictions on compare-exchange memory ordering.](https://github.com/rust-lang/rust/pull/98383/) +- You can now `write!` or `writeln!` into an `OsString`: [Implement `fmt::Write` for `OsString`](https://github.com/rust-lang/rust/pull/97915/) +- [Enforce that layout size fits in isize in Layout](https://github.com/rust-lang/rust/pull/95295/) +- [Make RwLockReadGuard covariant](https://github.com/rust-lang/rust/pull/96820/) +- [Implement `FusedIterator` for `std::net::[Into]Incoming`](https://github.com/rust-lang/rust/pull/97300/) +- [`impl AsRawFd for {Arc,Box}`](https://github.com/rust-lang/rust/pull/97437/) +- [ptr::copy and ptr::swap are doing untyped copies](https://github.com/rust-lang/rust/pull/97712/) +- [Add assertion that `transmute_copy`'s U is not larger than T](https://github.com/rust-lang/rust/pull/98839/) +- [A soundness bug in `BTreeMap` was fixed](https://github.com/rust-lang/rust/pull/99413/) that allowed data it was borrowing to be dropped before the container. +- [Add cgroupv1 support to `available_parallelism`](https://github.com/rust-lang/rust/pull/97925/) +- [mem::uninitialized: mitigate many incorrect uses of this function](https://github.com/rust-lang/rust/pull/99182/) + +Stabilized APIs +--------------- + +- [`ffi::CStr`](https://doc.rust-lang.org/stable/std/ffi/struct.CStr.html) +- [`ffi::CString`](https://doc.rust-lang.org/stable/std/ffi/struct.CString.html) +- [`ffi::FromBytesWithNulError`](https://doc.rust-lang.org/stable/std/ffi/struct.FromBytesWithNulError.html) +- [`ffi::FromVecWithNulError`](https://doc.rust-lang.org/stable/std/ffi/struct.FromVecWithNulError.html) +- [`ffi::IntoStringError`](https://doc.rust-lang.org/stable/std/ffi/struct.IntoStringError.html) +- [`ffi::NulError`](https://doc.rust-lang.org/stable/std/ffi/struct.NulError.html) +- [`ffi::c_char`](https://doc.rust-lang.org/stable/std/ffi/type.c_char.html) +- [`ffi::c_double`](https://doc.rust-lang.org/stable/std/ffi/type.c_double.html) +- [`ffi::c_float`](https://doc.rust-lang.org/stable/std/ffi/type.c_float.html) +- [`ffi::c_int`](https://doc.rust-lang.org/stable/std/ffi/type.c_int.html) +- [`ffi::c_long`](https://doc.rust-lang.org/stable/std/ffi/type.c_long.html) +- [`ffi::c_longlong`](https://doc.rust-lang.org/stable/std/ffi/type.c_longlong.html) +- [`ffi::c_schar`](https://doc.rust-lang.org/stable/std/ffi/type.c_schar.html) +- [`ffi::c_short`](https://doc.rust-lang.org/stable/std/ffi/type.c_short.html) +- [`ffi::c_uchar`](https://doc.rust-lang.org/stable/std/ffi/type.c_uchar.html) +- [`ffi::c_uint`](https://doc.rust-lang.org/stable/std/ffi/type.c_uint.html) +- [`ffi::c_ulong`](https://doc.rust-lang.org/stable/std/ffi/type.c_ulong.html) +- [`ffi::c_ulonglong`](https://doc.rust-lang.org/stable/std/ffi/type.c_ulonglong.html) +- [`ffi::c_ushort`](https://doc.rust-lang.org/stable/std/ffi/type.c_ushort.html) +- [`future::IntoFuture`](https://doc.rust-lang.org/stable/std/future/trait.IntoFuture.html) +- [`future::poll_fn`](https://doc.rust-lang.org/stable/std/future/fn.poll_fn.html) +- [`task::ready!`](https://doc.rust-lang.org/stable/std/task/macro.ready.html) +- [`num::NonZero*::checked_mul`](https://doc.rust-lang.org/stable/std/num/struct.NonZeroUsize.html#method.checked_mul) +- [`num::NonZero*::checked_pow`](https://doc.rust-lang.org/stable/std/num/struct.NonZeroUsize.html#method.checked_pow) +- [`num::NonZero*::saturating_mul`](https://doc.rust-lang.org/stable/std/num/struct.NonZeroUsize.html#method.saturating_mul) +- [`num::NonZero*::saturating_pow`](https://doc.rust-lang.org/stable/std/num/struct.NonZeroUsize.html#method.saturating_pow) +- [`num::NonZeroI*::abs`](https://doc.rust-lang.org/stable/std/num/struct.NonZeroIsize.html#method.abs) +- [`num::NonZeroI*::checked_abs`](https://doc.rust-lang.org/stable/std/num/struct.NonZeroIsize.html#method.checked_abs) +- [`num::NonZeroI*::overflowing_abs`](https://doc.rust-lang.org/stable/std/num/struct.NonZeroIsize.html#method.overflowing_abs) +- [`num::NonZeroI*::saturating_abs`](https://doc.rust-lang.org/stable/std/num/struct.NonZeroIsize.html#method.saturating_abs) +- [`num::NonZeroI*::unsigned_abs`](https://doc.rust-lang.org/stable/std/num/struct.NonZeroIsize.html#method.unsigned_abs) +- [`num::NonZeroI*::wrapping_abs`](https://doc.rust-lang.org/stable/std/num/struct.NonZeroIsize.html#method.wrapping_abs) +- [`num::NonZeroU*::checked_add`](https://doc.rust-lang.org/stable/std/num/struct.NonZeroUsize.html#method.checked_add) +- [`num::NonZeroU*::checked_next_power_of_two`](https://doc.rust-lang.org/stable/std/num/struct.NonZeroUsize.html#method.checked_next_power_of_two) +- [`num::NonZeroU*::saturating_add`](https://doc.rust-lang.org/stable/std/num/struct.NonZeroUsize.html#method.saturating_add) +- [`os::unix::process::CommandExt::process_group`](https://doc.rust-lang.org/stable/std/os/unix/process/trait.CommandExt.html#tymethod.process_group) +- [`os::windows::fs::FileTypeExt::is_symlink_dir`](https://doc.rust-lang.org/stable/std/os/windows/fs/trait.FileTypeExt.html#tymethod.is_symlink_dir) +- [`os::windows::fs::FileTypeExt::is_symlink_file`](https://doc.rust-lang.org/stable/std/os/windows/fs/trait.FileTypeExt.html#tymethod.is_symlink_file) + +These APIs are now usable in const contexts: + +- [`slice::from_raw_parts`](https://doc.rust-lang.org/stable/core/slice/fn.from_raw_parts.html) + +Cargo +----- +- Packages can now inherit settings from the workspace so that the settings + can be centralized in one place. See + [`workspace.package`](https://doc.rust-lang.org/nightly/cargo/reference/workspaces.html#the-workspacepackage-table) + and + [`workspace.dependencies`](https://doc.rust-lang.org/nightly/cargo/reference/workspaces.html#the-workspacedependencies-table) + for more details on how to define these common settings. + [#10859](https://github.com/rust-lang/cargo/pull/10859) +- Cargo commands can now accept multiple `--target` flags to build for + multiple targets at once, and the + [`build.target`](https://doc.rust-lang.org/nightly/cargo/reference/config.html#buildtarget) + config option may now take an array of multiple targets. + [#10766](https://github.com/rust-lang/cargo/pull/10766) +- The `--jobs` argument can now take a negative number to count backwards from + the max CPUs. + [#10844](https://github.com/rust-lang/cargo/pull/10844) +- `cargo add` will now update `Cargo.lock`. + [#10902](https://github.com/rust-lang/cargo/pull/10902) +- Added the + [`--crate-type`](https://doc.rust-lang.org/nightly/cargo/commands/cargo-rustc.html#option-cargo-rustc---crate-type) + flag to `cargo rustc` to override the crate type. + [#10838](https://github.com/rust-lang/cargo/pull/10838) +- Significantly improved the performance fetching git dependencies from GitHub + when using a hash in the `rev` field. + [#10079](https://github.com/rust-lang/cargo/pull/10079) + +Misc +---- +- [Let rust-analyzer ship on stable, non-preview](https://github.com/rust-lang/rust/pull/98640/) + +Compatibility Notes +------------------- +- The minimum required versions for all `-linux-gnu` targets are now at least kernel 3.2 and glibc 2.17, for targets that previously supported older versions: [Increase the minimum linux-gnu versions](https://github.com/rust-lang/rust/pull/95026/) +- [Implement network primitives with ideal Rust layout, not C system layout](https://github.com/rust-lang/rust/pull/78802/) +- [Add assertion that `transmute_copy`'s U is not larger than T](https://github.com/rust-lang/rust/pull/98839/) +- [A soundness bug in `BTreeMap` was fixed](https://github.com/rust-lang/rust/pull/99413/) that allowed data it was borrowing to be dropped before the container. +- [The Drop behavior of C-like enums cast to ints has changed](https://github.com/rust-lang/rust/pull/96862/). These are already discouraged by a compiler warning. +- [Relate late-bound closure lifetimes to parent fn in NLL](https://github.com/rust-lang/rust/pull/98835/) +- [Errors at const-eval time are now in future incompatibility reports](https://github.com/rust-lang/rust/pull/97743/) +- On the `thumbv6m-none-eabi` target, some incorrect `asm!` statements were erroneously accepted if they used the high registers (r8 to r14) as an input/output operand. [This is no longer accepted](https://github.com/rust-lang/rust/pull/99155/). +- [`impl Trait` was accidentally accepted as the associated type value of return-position `impl Trait`](https://github.com/rust-lang/rust/pull/97346/), without fulfilling all the trait bounds of that associated type, as long as the hidden type satisfies said bounds. This has been fixed. + +Internal Changes +---------------- + +These changes do not affect any public interfaces of Rust, but they represent +significant improvements to the performance or internals of rustc and related +tools. + +- Windows builds now use profile-guided optimization, providing 10-20% improvements to compiler performance: [Utilize PGO for windows x64 rustc dist builds](https://github.com/rust-lang/rust/pull/96978/) +- [Stop keeping metadata in memory before writing it to disk](https://github.com/rust-lang/rust/pull/96544/) +- [compiletest: strip debuginfo by default for mode=ui](https://github.com/rust-lang/rust/pull/98140/) +- Many improvements to generated code for derives, including performance improvements: + - [Don't use match-destructuring for derived ops on structs.](https://github.com/rust-lang/rust/pull/98446/) + - [Many small deriving cleanups](https://github.com/rust-lang/rust/pull/98741/) + - [More derive output improvements](https://github.com/rust-lang/rust/pull/98758/) + - [Clarify deriving code](https://github.com/rust-lang/rust/pull/98915/) + - [Final derive output improvements](https://github.com/rust-lang/rust/pull/99046/) + - [Stop injecting `#[allow(unused_qualifications)]` in generated `derive` implementations](https://github.com/rust-lang/rust/pull/99485/) + - [Improve `derive(Debug)`](https://github.com/rust-lang/rust/pull/98190/) +- [Bump to clap 3](https://github.com/rust-lang/rust/pull/98213/) +- [fully move dropck to mir](https://github.com/rust-lang/rust/pull/98641/) +- [Optimize `Vec::insert` for the case where `index == len`.](https://github.com/rust-lang/rust/pull/98755/) +- [Convert rust-analyzer to an in-tree tool](https://github.com/rust-lang/rust/pull/99603/) + Version 1.63.0 (2022-08-11) ==========================