- Added new language capabilities: ? operator in macros, literal matching in macros, Self constructors/patterns, and must_use trait attribute.
- Switched the default allocator from jemalloc to the system allocator, stabilized the dbg! macro, marked many standard library APIs as const, and introduced the aarch64‑pc‑windows‑msvc target.
- Enhanced Cargo with a `cargo c` alias for check, permitted usernames in alternate registry URLs, and changed AVX intrinsics argument mutability (breaking).
Rust 1.32.0
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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.