Initial 1.78 release notes

Author: Mark-Simulacrum

RELEASES.md

@@ -1,3 +1,116 @@
+Version 1.78.0 (2024-05-02)
+==========================
+
+<a id="1.78.0-Language"></a>
+
+Language
+--------
+- [Stabilize `#[cfg(target_abi = ...)]`](https://github.com/rust-lang/rust/pull/119590/)
+- [Stabilize the `#[diagnostic]` namespace and `#[diagnostic::on_unimplemented]` attribute](https://github.com/rust-lang/rust/pull/119888/)
+- [Make async-fn-in-trait implementable with concrete signatures](https://github.com/rust-lang/rust/pull/120103/)
+- [Make matching on NaN a hard error, and remove the rest of illegal_floating_point_literal_pattern](https://github.com/rust-lang/rust/pull/116284/)
+- [static mut: allow mutable reference to arbitrary types, not just slices and arrays](https://github.com/rust-lang/rust/pull/117614/)
+- [Add `non_local_definitions` lint for non-local `impl` definitions in functions](https://github.com/rust-lang/rust/pull/120393/)
+- [Add `non_contiguous_range_endpoints` lint for singleton gaps after exclusive ranges](https://github.com/rust-lang/rust/pull/118879/)
+- [Add `wasm_c_abi` lint for use of older wasm-bindgen versions](https://github.com/rust-lang/rust/pull/117918/)
+  This lint only works with Cargo.
+- [Update `indirect_structural_match` and `pointer_structural_match` lints to match RFC](https://github.com/rust-lang/rust/pull/120423/)
+- [Make non-`PartialEq`-typed consts as patterns a hard error](https://github.com/rust-lang/rust/pull/120805/)
+- [align_offset, align_to: no longer allow implementations to spuriously fail to align](https://github.com/rust-lang/rust/pull/121201/)
+- [Split refining_impl_trait lint into `_reachable`, `_internal` variants](https://github.com/rust-lang/rust/pull/121720/)
+- [Make `ConstPropLint` lint run on promoteds](https://github.com/rust-lang/rust/pull/119432/)
+
+<a id="1.78.0-Compiler"></a>
+
+Compiler
+--------
+
+- [Made `INVALID_DOC_ATTRIBUTES` lint deny by default](https://github.com/rust-lang/rust/pull/111505/)
+- [Extend `invalid_reference_casting` to include references casting to bigger memory layout](https://github.com/rust-lang/rust/pull/118983/)
+- [Increase accuracy of redundant `use` checking](https://github.com/rust-lang/rust/pull/117772/)
+- [Suggest moving definition if non-found macro_rules! is defined later](https://github.com/rust-lang/rust/pull/121130/)
+- [Lower transmutes from int to pointer type as gep on null](https://github.com/rust-lang/rust/pull/121282/)
+- [Update to LLVM 18](https://github.com/rust-lang/rust/pull/120055/)
+
+Target changes:
+
+- [Increase minimum to Windows 10 for tier 2 platform support](https://github.com/rust-lang/rust/pull/115141/)
+  - [Enables CMPXCHG16B, SSE3, SAHF/LAHF and 128-bit Atomics in tier 1 Windows](https://github.com/rust-lang/rust/pull/120820/)
+- [Add `wasm32-wasip1` tier 2 (without host tools) target](https://github.com/rust-lang/rust/pull/120468/)
+- [Add `arm64ec-pc-windows-msvc` tier 3 target](https://github.com/rust-lang/rust/pull/119199/)
+- [Add `loongarch64-unknown-linux-musl` tier 3 target](https://github.com/rust-lang/rust/pull/121832/)
+- [Add `armv8r-none-eabihf` tier 3 target for the Cortex-R52](https://github.com/rust-lang/rust/pull/110482/)
+- [Rename `wasm32-wasi-preview1-threads` to `wasm32-wasip1-threads`](https://github.com/rust-lang/rust/pull/122170/)
+- [Add a new `wasm32-wasi-preview2` target](https://github.com/rust-lang/rust/pull/119616/)
+
+- [coverage: Split out counter increment sites from BCB node/edge counters](https://github.com/rust-lang/rust/pull/120564/)
+- [coverage: Improve handling of function/closure spans](https://github.com/rust-lang/rust/pull/120569/)
+- [Only generate a ptrtoint in AtomicPtr codegen when absolutely necessary](https://github.com/rust-lang/rust/pull/122220/)
+
+<a id="1.78.0-Libraries"></a>
+
+Libraries
+---------
+- [Optimize away poison guards when std is built with panic=abort](https://github.com/rust-lang/rust/pull/100603/)
+- [PartialEq, PartialOrd: update and synchronize handling of transitive chains](https://github.com/rust-lang/rust/pull/115386/)
+- [Toggle assert_unsafe_precondition in codegen instead of expansion](https://github.com/rust-lang/rust/pull/120594/)
+- [Bump Unicode to version 15.1.0, regenerate tables](https://github.com/rust-lang/rust/pull/120777/)
+- [Implement unwind safety for Condvar on all platforms ](https://github.com/rust-lang/rust/pull/121768/)
+- [Windows: Implement condvar, mutex and rwlock using futex](https://github.com/rust-lang/rust/pull/121956/)
+- [Replace pthread `RwLock` with custom implementation](https://github.com/rust-lang/rust/pull/110211/)
+- [Add `#[rustc_no_mir_inline]` for standard library UB checks](https://github.com/rust-lang/rust/pull/121114/)
+- [Add ASCII fast-path for `char::is_grapheme_extended`](https://github.com/rust-lang/rust/pull/121138/)
+- [Always inline check in `assert_unsafe_precondition` with cfg(debug_assertions)](https://github.com/rust-lang/rust/pull/121196/)
+
+<a id="1.78.0-Stabilized-APIs"></a>
+
+Stabilized APIs
+---------------
+
+- [Add Read Impl for &Stdin](https://github.com/rust-lang/rust/pull/99153/)
+- [`std::error::Error` -> Trait Implementations: lifetimes consistency improvement](https://github.com/rust-lang/rust/pull/113833/)
+- [Make `impl<Fd: AsFd>` impl take `?Sized`](https://github.com/rust-lang/rust/pull/114655/)
+- [impl From<TryReserveError> for `io::Error`](https://github.com/rust-lang/rust/pull/121403/)
+- [Make `Barrier::new()` const](https://github.com/rust-lang/rust/pull/119536/)
+
+<a id="1.78.0-Cargo"></a>
+
+Cargo
+-----
+- [Stabilize lockfile v4](https://github.com/rust-lang/cargo/pull/12852/)
+- [Respect `rust-version` when generating lockfile ](https://github.com/rust-lang/cargo/pull/12861/)
+- [Control `--charset` via auto-detecting config value](https://github.com/rust-lang/cargo/pull/13337/)
+- [Support `target.<triple>.rustdocflags` officially](https://github.com/rust-lang/cargo/pull/13197/)
+- [Allow `--precise` to allow yanked versions in `cargo update`](https://github.com/rust-lang/cargo/pull/13333/)
+- [Stabilize global cache data tracking.](https://github.com/rust-lang/cargo/pull/13492/)
+
+<a id="1.78.0-Misc"></a>
+
+Misc
+----
+
+- [rustdoc: add `--test-builder-wrapper` arg to support wrappers such as RUSTC_WRAPPER when building doctests](https://github.com/rust-lang/rust/pull/114651/)
+
+<a id="1.78.0-Compatibility-Notes"></a>
+
+Compatibility Notes
+-------------------
+- [riscv only supports split_debuginfo=off for now](https://github.com/rust-lang/rust/pull/120518/)
+
+
+<a id="1.78.0-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.
+
+- [Build `rustc` with 1CGU on `x86_64-pc-windows-msvc`](https://github.com/rust-lang/rust/pull/112267/)
+- [Build `rustc` with 1CGU on `x86_64-apple-darwin`](https://github.com/rust-lang/rust/pull/112268/)
+- [Introduce `run-make` V2 infrastructure, a `run_make_support` library and port over 2 tests as example](https://github.com/rust-lang/rust/pull/113026/)
+
 Version 1.77.1 (2024-03-28)
 ===========================