- Enabled Non‑Lexical Lifetimes on the 2015 edition and made trait‑object ordering semantics stable, plus numerous APIs (e.g., const fns, VecDeque rotations, IO slices) are now stabilized.
- Replaced the standard HashMap implementation with hashbrown, stabilized the alloc crate for no‑std environments, and extended the dbg! macro to accept and return multiple arguments.
- Added deprecation warning for mem::uninitialized (to be removed in 1.39) and introduced new Cargo features (offline mode, required‑dependency name validation).
Rust 1.36.0
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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.