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Add release notes for 1.79.0 #125470

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128 changes: 128 additions & 0 deletions RELEASES.md
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Version 1.79.0 (2024-06-13)
==========================

<a id="1.79.0-Language"></a>

Language
--------
- [Stabilize inline `const {}` expressions.](https://github.com/rust-lang/rust/pull/104087/)
- [Prevent opaque types being instantiated twice with different regions within the same function.](https://github.com/rust-lang/rust/pull/116935/)
- [Stabilize WebAssembly target features that are in phase 4 and 5.](https://github.com/rust-lang/rust/pull/117457/)
- [Add the `redundant_lifetimes` lint to detect lifetimes which are semantically redundant.](https://github.com/rust-lang/rust/pull/118391/)
- [Stabilize the `unnameable_types` lint for public types that can't be named.](https://github.com/rust-lang/rust/pull/120144/)
- [Enable debuginfo in macros, and stabilize `-C collapse-macro-debuginfo` and `#[collapse_debuginfo]`.](https://github.com/rust-lang/rust/pull/120845/)
- [Propagate temporary lifetime extension into `if` and `match` expressions.](https://github.com/rust-lang/rust/pull/121346/)
- [Restrict promotion of `const fn` calls.](https://github.com/rust-lang/rust/pull/121557/)
- [Warn against refining impls of crate-private traits with `refining_impl_trait` lint.](https://github.com/rust-lang/rust/pull/121720/)
- [Stabilize associated type bounds (RFC 2289).](https://github.com/rust-lang/rust/pull/122055/)
- [Stabilize importing `main` from other modules or crates.](https://github.com/rust-lang/rust/pull/122060/)
- [Check return types of function types for well-formedness](https://github.com/rust-lang/rust/pull/115538)
- [Rework `impl Trait` lifetime inference](https://github.com/rust-lang/rust/pull/116891/)
- [Change inductive trait solver cycles to be ambiguous](https://github.com/rust-lang/rust/pull/122791)

<a id="1.79.0-Compiler"></a>

Compiler
--------
- [Define `-C strip` to only affect binaries, not artifacts like `.pdb`.](https://github.com/rust-lang/rust/pull/115120/)
- [Stabilize `-Crelro-level` for controlling runtime link hardening.](https://github.com/rust-lang/rust/pull/121694/)
- [Stabilize checking of `cfg` names and values at compile-time with `--check-cfg`.](https://github.com/rust-lang/rust/pull/123501/)
*Note that this only stabilizes the compiler part, the Cargo part is still unstable in this release.*
- [Add `aarch64-apple-visionos` and `aarch64-apple-visionos-sim` tier 3 targets.](https://github.com/rust-lang/rust/pull/121419/)
- [Add `riscv32ima-unknown-none-elf` tier 3 target.](https://github.com/rust-lang/rust/pull/122696/)
- [Promote several Windows targets to tier 2](https://github.com/rust-lang/rust/pull/121712): `aarch64-pc-windows-gnullvm`, `i686-pc-windows-gnullvm`, and `x86_64-pc-windows-gnullvm`.

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

<a id="1.79.0-Libraries"></a>

Libraries
---------

- [Implement `FromIterator` for `(impl Default + Extend, impl Default + Extend)`.](https://github.com/rust-lang/rust/pull/107462/)
- [Implement `{Div,Rem}Assign<NonZero<X>>` on `X`.](https://github.com/rust-lang/rust/pull/121952/)
- [Document overrides of `clone_from()` in core/std.](https://github.com/rust-lang/rust/pull/122201/)
- [Link MSVC default lib in core.](https://github.com/rust-lang/rust/pull/122268/)
- [Caution against using `transmute` between pointers and integers.](https://github.com/rust-lang/rust/pull/122379/)
- [Enable frame pointers for the standard library.](https://github.com/rust-lang/rust/pull/122646/)

<a id="1.79.0-Stabilized-APIs"></a>

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

- [`{integer}::unchecked_add`](https://doc.rust-lang.org/stable/core/primitive.i32.html#method.unchecked_add)
- [`{integer}::unchecked_mul`](https://doc.rust-lang.org/stable/core/primitive.i32.html#method.unchecked_mul)
- [`{integer}::unchecked_sub`](https://doc.rust-lang.org/stable/core/primitive.i32.html#method.unchecked_sub)
- [`<[T]>::split_at_unchecked`](https://doc.rust-lang.org/stable/core/primitive.slice.html#method.split_at_unchecked)
- [`<[T]>::split_at_mut_unchecked`](https://doc.rust-lang.org/stable/core/primitive.slice.html#method.split_at_mut_unchecked)
- [`<[u8]>::utf8_chunks`](https://doc.rust-lang.org/stable/core/primitive.slice.html#method.utf8_chunks)
- [`str::Utf8Chunks`](https://doc.rust-lang.org/stable/core/str/struct.Utf8Chunks.html)
- [`str::Utf8Chunk`](https://doc.rust-lang.org/stable/core/str/struct.Utf8Chunk.html)
- [`<*const T>::is_aligned`](https://doc.rust-lang.org/stable/core/primitive.pointer.html#method.is_aligned)
- [`<*mut T>::is_aligned`](https://doc.rust-lang.org/stable/core/primitive.pointer.html#method.is_aligned-1)
- [`NonNull::is_aligned`](https://doc.rust-lang.org/stable/core/ptr/struct.NonNull.html#method.is_aligned)
- [`<*const [T]>::len`](https://doc.rust-lang.org/stable/core/primitive.pointer.html#method.len)
- [`<*mut [T]>::len`](https://doc.rust-lang.org/stable/core/primitive.pointer.html#method.len-1)
- [`<*const [T]>::is_empty`](https://doc.rust-lang.org/stable/core/primitive.pointer.html#method.is_empty)
- [`<*mut [T]>::is_empty`](https://doc.rust-lang.org/stable/core/primitive.pointer.html#method.is_empty-1)
- [`NonNull::<[T]>::is_empty`](https://doc.rust-lang.org/stable/core/ptr/struct.NonNull.html#method.is_empty)
- [`CStr::count_bytes`](https://doc.rust-lang.org/stable/core/ffi/c_str/struct.CStr.html#method.count_bytes)
- [`io::Error::downcast`](https://doc.rust-lang.org/stable/std/io/struct.Error.html#method.downcast)
- [`num::NonZero<T>`](https://doc.rust-lang.org/stable/core/num/struct.NonZero.html)
- [`path::absolute`](https://doc.rust-lang.org/stable/std/path/fn.absolute.html)
- [`proc_macro::Literal::byte_character`](https://doc.rust-lang.org/stable/proc_macro/struct.Literal.html#method.byte_character)
- [`proc_macro::Literal::c_string`](https://doc.rust-lang.org/stable/proc_macro/struct.Literal.html#method.c_string)

These APIs are now stable in const contexts:

- [`Atomic*::into_inner`](https://doc.rust-lang.org/stable/core/sync/atomic/struct.AtomicUsize.html#method.into_inner)
- [`io::Cursor::new`](https://doc.rust-lang.org/stable/std/io/struct.Cursor.html#method.new)
- [`io::Cursor::get_ref`](https://doc.rust-lang.org/stable/std/io/struct.Cursor.html#method.get_ref)
- [`io::Cursor::position`](https://doc.rust-lang.org/stable/std/io/struct.Cursor.html#method.position)
- [`io::empty`](https://doc.rust-lang.org/stable/std/io/fn.empty.html)
- [`io::repeat`](https://doc.rust-lang.org/stable/std/io/fn.repeat.html)
- [`io::sink`](https://doc.rust-lang.org/stable/std/io/fn.sink.html)
- [`panic::Location::caller`](https://doc.rust-lang.org/stable/std/panic/struct.Location.html#method.caller)
- [`panic::Location::file`](https://doc.rust-lang.org/stable/std/panic/struct.Location.html#method.file)
- [`panic::Location::line`](https://doc.rust-lang.org/stable/std/panic/struct.Location.html#method.line)
- [`panic::Location::column`](https://doc.rust-lang.org/stable/std/panic/struct.Location.html#method.column)

<a id="1.79.0-Cargo"></a>

Cargo
-----

- [Prevent dashes in `lib.name`, always normalizing to `_`.](https://github.com/rust-lang/cargo/pull/12783/)
- [Stabilize MSRV-aware version requirement selection in `cargo add`.](https://github.com/rust-lang/cargo/pull/13608/)
- [Switch to using `gitoxide` by default for listing files.](https://github.com/rust-lang/cargo/pull/13696/)
- [Error on `[project]` in Edition 2024; `cargo fix --edition` will change it to `[package]`.](https://github.com/rust-lang/cargo/pull/13747/)

<a id="1.79.0-Rustdoc"></a>

Rustdoc
-----

- [Always display stability version even if it's the same as the containing item.](https://github.com/rust-lang/rust/pull/118441/)
- [Show a single search result for items with multiple paths.](https://github.com/rust-lang/rust/pull/119912/)
- [Support typing `/` in docs to begin a search.](https://github.com/rust-lang/rust/pull/123355/)

<a id="1.79.0-Misc"></a>

Misc
----

<a id="1.79.0-Compatibility-Notes"></a>

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

- [Update the minimum external LLVM to 17.](https://github.com/rust-lang/rust/pull/122649/)
- [`RustcEncodable` and `RustcDecodable` are soft-destabilized, to be removed
from the prelude in next edition.](https://github.com/rust-lang/rust/pull/116016/)
- [The `wasm_c_abi` future-incompatibility lint will warn about use of the
non-spec-compliant C ABI.](https://github.com/rust-lang/rust/pull/117918/)
Use `wasm-bindgen v0.2.88` to generate forward-compatible bindings.
- [Check return types of function types for well-formedness](https://github.com/rust-lang/rust/pull/115538)

Version 1.78.0 (2024-05-02)
==========================

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