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Add release notes for 1.73.0 #116083

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Oct 3, 2023
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Add release notes for 1.73.0 #116083

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d128b8b
Add release notes for 1.73.0
cuviper Sep 23, 2023
c6bb731
Apply suggestions for 1.73.0 relnotes
cuviper Oct 2, 2023
0eb8973
Shuffle around some 1.73.0 relnotes
cuviper Oct 2, 2023
9501ff0
Fix a few typos
Mark-Simulacrum Oct 3, 2023
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117 changes: 117 additions & 0 deletions RELEASES.md
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Version 1.73.0 (2023-10-05)
==========================

<a id="1.73.0-Language"></a>

Language
--------

- [Uplift `clippy::fn_null_check` lint as `useless_ptr_null_checks`.](https://github.com/rust-lang/rust/pull/111717/)
- [Make `noop_method_call` warn by default.](https://github.com/rust-lang/rust/pull/111916/)
- [Support interpolated block for `try` and `async` in macros.](https://github.com/rust-lang/rust/pull/112953/)
- [Make `unconditional_recursion` lint detect recursive drops.](https://github.com/rust-lang/rust/pull/113902/)
- [Future compatibility warning for some impls being incorrectly considered not overlapping.](https://github.com/rust-lang/rust/pull/114023/)
- [The `invalid_reference_casting` lint is now **deny-by-default** (instead of allow-by-default)](https://github.com/rust-lang/rust/pull/112431)

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<a id="1.73.0-Compiler"></a>

Compiler
--------

- [Write version information in a `.comment` section like GCC/Clang.](https://github.com/rust-lang/rust/pull/97550/)
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We should mention something about how to disable this, for people who don't want it.

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This was added unconditionally, unless perhaps there's an argument to LLVM or the linker to filter it out. And of course the section can be stripped afterward. What do you suggest?

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If the only way to remove it is to strip it out, then we should tell people that.

- [Add documentation on v0 symbol mangling.](https://github.com/rust-lang/rust/pull/97571/)
- [Stabilize `extern "thiscall"` and `"thiscall-unwind"` ABIs.](https://github.com/rust-lang/rust/pull/114562/)
- [Only check outlives goals on impl compared to trait.](https://github.com/rust-lang/rust/pull/109356/)
- [Infer type in irrefutable slice patterns with fixed length as array.](https://github.com/rust-lang/rust/pull/113199/)
- [Discard default auto trait impls if explicit ones exist.](https://github.com/rust-lang/rust/pull/113312/)
- Add several new tier 3 targets:
- [`aarch64-unknown-teeos`](https://github.com/rust-lang/rust/pull/113480/)
- [`csky-unknown-linux-gnuabiv2`](https://github.com/rust-lang/rust/pull/113658/)
- [`riscv64-linux-android`](https://github.com/rust-lang/rust/pull/112858/)
- [`riscv64gc-unknown-hermit`](https://github.com/rust-lang/rust/pull/114004/)
- [`x86_64-unikraft-linux-musl`](https://github.com/rust-lang/rust/pull/113411/)
- [`x86_64-unknown-linux-ohos`](https://github.com/rust-lang/rust/pull/113061/)
- [Add `wasm32-wasi-preview1-threads` as a tier 2 target.](https://github.com/rust-lang/rust/pull/112922/)

Refer to Rust's [platform support page][platform-support-doc]
for more information on Rust's tiered platform support.

<a id="1.73.0-Libraries"></a>

Libraries
---------

- [Add `Read`, `Write` and `Seek` impls for `Arc<File>`.](https://github.com/rust-lang/rust/pull/94748/)
- [Merge functionality of `io::Sink` into `io::Empty`.](https://github.com/rust-lang/rust/pull/98154/)
- [Implement `RefUnwindSafe` for `Backtrace`](https://github.com/rust-lang/rust/pull/100455/)
- [Make `ExitStatus` implement `Default`](https://github.com/rust-lang/rust/pull/106425/)
- [`impl SliceIndex<str> for (Bound<usize>, Bound<usize>)`](https://github.com/rust-lang/rust/pull/111081/)
- [Change default panic handler message format.](https://github.com/rust-lang/rust/pull/112849/)
- [Cleaner `assert_eq!` & `assert_ne!` panic messages.](https://github.com/rust-lang/rust/pull/111071/)
- [Correct the (deprecated) Android `stat` struct definitions.](https://github.com/rust-lang/rust/pull/113130/)

<a id="1.73.0-Stabilized-APIs"></a>

Stabilized APIs
---------------

- [Unsigned `{integer}::div_ceil`](https://doc.rust-lang.org/stable/std/primitive.u32.html#method.div_ceil)
- [Unsigned `{integer}::next_multiple_of`](https://doc.rust-lang.org/stable/std/primitive.u32.html#method.next_multiple_of)
- [Unsigned `{integer}::checked_next_multiple_of`](https://doc.rust-lang.org/stable/std/primitive.u32.html#method.checked_next_multiple_of)
- [`std::ffi::FromBytesUntilNulError`](https://doc.rust-lang.org/stable/std/ffi/struct.FromBytesUntilNulError.html)
- [`std::os::unix::fs::chown`](https://doc.rust-lang.org/stable/std/os/unix/fs/fn.chown.html)
- [`std::os::unix::fs::fchown`](https://doc.rust-lang.org/stable/std/os/unix/fs/fn.fchown.html)
- [`std::os::unix::fs::lchown`](https://doc.rust-lang.org/stable/std/os/unix/fs/fn.lchown.html)
- [`LocalKey::<Cell<T>>::get`](https://doc.rust-lang.org/stable/std/thread/struct.LocalKey.html#method.get)
- [`LocalKey::<Cell<T>>::set`](https://doc.rust-lang.org/stable/std/thread/struct.LocalKey.html#method.set)
- [`LocalKey::<Cell<T>>::take`](https://doc.rust-lang.org/stable/std/thread/struct.LocalKey.html#method.take)
- [`LocalKey::<Cell<T>>::replace`](https://doc.rust-lang.org/stable/std/thread/struct.LocalKey.html#method.replace)
- [`LocalKey::<RefCell<T>>::with_borrow`](https://doc.rust-lang.org/stable/std/thread/struct.LocalKey.html#method.with_borrow)
- [`LocalKey::<RefCell<T>>::with_borrow_mut`](https://doc.rust-lang.org/stable/std/thread/struct.LocalKey.html#method.with_borrow_mut)
- [`LocalKey::<RefCell<T>>::set`](https://doc.rust-lang.org/stable/std/thread/struct.LocalKey.html#method.set-1)
- [`LocalKey::<RefCell<T>>::take`](https://doc.rust-lang.org/stable/std/thread/struct.LocalKey.html#method.take-1)
- [`LocalKey::<RefCell<T>>::replace`](https://doc.rust-lang.org/stable/std/thread/struct.LocalKey.html#method.replace-1)

These APIs are now stable in const contexts:

- [`rc::Weak::new`](https://doc.rust-lang.org/stable/alloc/rc/struct.Weak.html#method.new)
- [`sync::Weak::new`](https://doc.rust-lang.org/stable/alloc/sync/struct.Weak.html#method.new)
- [`NonNull::as_ref`](https://doc.rust-lang.org/stable/core/ptr/struct.NonNull.html#method.as_ref)

<a id="1.73.0-Cargo"></a>

Cargo
-----

- [Encode URL params correctly for `SourceId` in `Cargo.lock`.](https://github.com/rust-lang/cargo/pull/12280/)
- [Bail out an error when using `cargo::` in custom build script.](https://github.com/rust-lang/cargo/pull/12332/)

<a id="1.73.0-Misc"></a>

Misc
----

<a id="1.73.0-Compatibility-Notes"></a>

Compatibility Notes
-------------------

- [Update the minimum external LLVM to 15.](https://github.com/rust-lang/rust/pull/114148/)
- [Check for non-defining uses of return position `impl Trait`.](https://github.com/rust-lang/rust/pull/112842/)

<a id="1.73.0-Internal-Changes"></a>

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.

- [Remove LLVM pointee types, supporting only opaque pointers.](https://github.com/rust-lang/rust/pull/105545/)
- [Port PGO/LTO/BOLT optimized build pipeline to Rust.](https://github.com/rust-lang/rust/pull/112235/)
- [Replace in-tree `rustc_apfloat` with the new version of the crate.](https://github.com/rust-lang/rust/pull/113843/)
- [Update to LLVM 17.](https://github.com/rust-lang/rust/pull/114048/)
- [Add `internal_features` lint for internal unstable features.](https://github.com/rust-lang/rust/pull/108955/)
- [Mention style for new syntax in tracking issue template.](https://github.com/rust-lang/rust/pull/113586/)

Version 1.72.1 (2023-09-19)
===========================

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