Update RELEASES.md for 1.54.0
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Erin Power
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RELEASES.md
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RELEASES.md
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Version 1.54.0 (2021-06-29)
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============================
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Language
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-----------------------
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- [You can now use macros for values in key-value attributes.][83366]
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While a seemingly minor addition on its own, this enables a lot of
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powerful functionality when combined correctly. Most notably you can
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now include external documentation in your crate by writing the following.
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```rust
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#![doc = include_str!("README.md")]
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```
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- [You can now cast between unsized slice types (and types which contain
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unsized slices) in `const fn`.][85078]
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- [TODO: stabilize member constraints][84701]
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Compiler
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-----------------------
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- [Rustc will now search for custom JSON targets in
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`/lib/rustlib/<target-triple>/target.json` where `/` is the "sysroot"
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directory.][83800] You can find your sysroot directory by running
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`rustc --print sysroot`.
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- [Added `wasm` as a `target_family` for WebAssembly platforms.][84072]
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- [You can now use `#[target_feature]` on safe functions when targeting
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WebAssembly platforms.][84988]
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- [Improved debugger output for enums on Windows MSVC platorms.][85292]
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- [Added tier 3\* support for `bpfel-unknown-none`
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and `bpfeb-unknown-none`.][79608]
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- [Added tier 3 support for `powerpc64le-unknown-freebsd`.][83572]
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Libraries
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-----------------------
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- [You can now explicitly import the prelude of different editions
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through `std::prelude`. (e.g. `use std::prelude::rust_2021::*;`)][86294]
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- [`panic::panic_any` will now `#[track_caller]`.][85745]
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- [Added `OutOfMemory` as a variant of `io::ErrorKind`.][84744]
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- [ `proc_macro::Literal` now implements `FromStr`.][84717]
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- [TODO: Bump stdarch submodule][83278]
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Stabilized APIs
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---------------
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- [`BTreeMap::into_keys`]
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- [`BTreeMap::into_values`]
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- [`HashMap::into_keys`]
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- [`HashMap::into_values`]
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- [`MaybeUninit::assume_init_mut`]
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- [`MaybeUninit::assume_init_ref`]
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- [`arch::wasm32`]
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- [`arch::x86::_bittest`]
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- [`arch::x86::_bittestandcomplement`]
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- [`arch::x86::_bittestandset`]
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- [`arch::x86_64::_bittest`]
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- [`arch::x86_64::_bittestandcomplement64`]
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- [`arch::x86_64::_bittestandcomplement`]
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- [`arch::x86_64::_bittestandreset64`]
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- [`arch::x86_64::_bittestandset64`]
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- [`arch::x86_64::_bittestandset`]
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- [`ops::ControlFlow`]
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- [`VecDeque::binary_search`]
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- [`VecDeque::binary_search_by`]
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- [`VecDeque::binary_search_by_key`]
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- [`VecDeque::partition_point`]
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Cargo
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-----------------------
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- [Added the `--prune <spec>` option to `cargo-tree` to remove a package from
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the dependency graph.][cargo/9520]
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- [Added the `--depth` option to `cargo-tree` to print only to a certain depth
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in the tree ][cargo/9499]
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- [Added the `no-proc-macro` value to `cargo-tree --edges` to hide procedural
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macro dependencies.][cargo/9488]
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- [A new environment variable named `CARGO_TARGET_TMPDIR` is available.][cargo/9375]
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This variable points to a directory that integration tests and benches
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can use as a "scratchpad" for testing filesystem operations.
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- [Configure hosts separately from targets when --target is specified.][cargo/9322]
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- [Respect Cargo.toml `[package.exclude]` even not in a git repo.][cargo/9186]
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[79608]: https://github.com/rust-lang/rust/pull/79608
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[84988]: https://github.com/rust-lang/rust/pull/84988
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[84701]: https://github.com/rust-lang/rust/pull/84701
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[84072]: https://github.com/rust-lang/rust/pull/84072
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[86294]: https://github.com/rust-lang/rust/pull/86294
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[85745]: https://github.com/rust-lang/rust/pull/85745
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[84744]: https://github.com/rust-lang/rust/pull/84744
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[85078]: https://github.com/rust-lang/rust/pull/85078
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[84717]: https://github.com/rust-lang/rust/pull/84717
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[83800]: https://github.com/rust-lang/rust/pull/83800
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[83366]: https://github.com/rust-lang/rust/pull/83366
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[83278]: https://github.com/rust-lang/rust/pull/83278
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[85292]: https://github.com/rust-lang/rust/pull/85292
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[83572]: https://github.com/rust-lang/rust/pull/83572
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[cargo/9520]: https://github.com/rust-lang/cargo/pull/9520
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[cargo/9499]: https://github.com/rust-lang/cargo/pull/9499
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[cargo/9488]: https://github.com/rust-lang/cargo/pull/9488
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[cargo/9375]: https://github.com/rust-lang/cargo/pull/9375
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[cargo/9322]: https://github.com/rust-lang/cargo/pull/9322
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[cargo/9186]: https://github.com/rust-lang/cargo/pull/9186
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[`arch::x86::_bittest`]: https://doc.rust-lang.org/stable/core/arch/x86/fn._bittest.html
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[`arch::x86::_bittestandcomplement`]: https://doc.rust-lang.org/stable/core/arch/x86/fn._bittestandcomplement.html
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[`arch::x86::_bittestandset`]: https://doc.rust-lang.org/stable/core/arch/x86/fn._bittestandset.html
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[`arch::x86_64::_bittest`]: https://doc.rust-lang.org/stable/core/arch/x86_64/fn._bittest.html
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[`arch::x86_64::_bittestandcomplement64`]: https://doc.rust-lang.org/stable/core/arch/x86_64/fn._bittestandcomplement64.html
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[`arch::x86_64::_bittestandcomplement`]: https://doc.rust-lang.org/stable/core/arch/x86_64/fn._bittestandcomplement.html
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[`arch::x86_64::_bittestandreset64`]: https://doc.rust-lang.org/stable/core/arch/x86_64/fn._bittestandreset64.html
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[`arch::x86_64::_bittestandset64`]: https://doc.rust-lang.org/stable/core/arch/x86_64/fn._bittestandset64.html
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[`arch::x86_64::_bittestandset`]: https://doc.rust-lang.org/stable/core/arch/x86_64/fn._bittestandset.html
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[`BTreeMap::into_keys`]: https://doc.rust-lang.org/std/collections/struct.BTreeMap.html#method.into_keys
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[`BTreeMap::into_values`]: https://doc.rust-lang.org/std/collections/struct.BTreeMap.html#method.into_values
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[`HashMap::into_keys`]: https://doc.rust-lang.org/std/collections/struct.HashMap.html#method.into_keys
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[`HashMap::into_values`]: https://doc.rust-lang.org/std/collections/struct.HashMap.html#method.into_values
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[`MaybeUninit::assume_init_ref`]: https://doc.rust-lang.org/std/mem/union.MaybeUninit.html#method.assume_init_ref
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[`MaybeUninit::assume_init_mut`]: https://doc.rust-lang.org/std/mem/union.MaybeUninit.html#method.assume_init_mut
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[`arch::wasm32`]: https://doc.rust-lang.org/core/arch/wasm32/index.html
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[`ops::ControlFlow`]: https://doc.rust-lang.org/std/ops/enum.ControlFlow.html
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[`VecDeque::binary_search`]: https://doc.rust-lang.org/std/collections/struct.VecDeque.html#method.binary_search
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[`VecDeque::binary_search_by`]: https://doc.rust-lang.org/std/collections/struct.VecDeque.html#method.binary_search_by
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[`VecDeque::binary_search_by_key`]: https://doc.rust-lang.org/std/collections/struct.VecDeque.html#method.binary_search_by_key
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[`VecDeque::partition_point`]: https://doc.rust-lang.org/std/collections/struct.VecDeque.html#method.partition_point
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Version 1.53.0 (2021-06-17)
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============================
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