- Added support for named captures in format strings (`{ident}`) and expanded const‑eval capabilities (e.g., dereferencing const pointers, Duration methods, File::options) with relaxed Unsize rules.
- Stabilized new compiler and tooling options: `-Z strip` for removing debug symbols, LLVM CFI support, coverage mapping versions 5/6, and LLVM optimization remarks emission.
- Introduced breaking and quality‑of‑life changes: Windows `Command` no longer searches the current directory, proc‑macro compatibility lints are now denied by default, rustdoc now recursively shows `Deref` impls and rejects stray semicolo...
Rust 1.58.0
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Language: allow shortening lifetimes of &mut during unsize coercions and introduce new lints for invalid runtime symbols and c void return types.