- Added async/await support for no_std and made vec![] usable in const contexts, plus many new const APIs and library improvements (e.g., Infallible Hash, OsString mutable deref, Unicode 13, const byte‑order conversions).
- Expanded compiler capabilities with tier‑3 target support, zero‑cost catch unwind, default 256 codegen units in incremental mode, new cargo tree command, rustdoc version display, and correct .a static library generation on Windows GNU ta...
- Implemented safety and compatibility fixes such as mem::zeroed now panicking on non‑zero‑initializable types, removal of the obsolete C no‑integrated‑as flag, and bumping the minimum LLVM requirement to version 8.
Rust 1.44.0
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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.