- Added many new features: interpolated blocks in try/async macros, const‑eval stabilized APIs, extern "thiscall" ABIs, Arc<File> Read/Write/Seek impls, and numerous new Tier‑3 and Tier‑2 targets (e.g., wasm32‑wasi preview1 threads).
- Tightened lint and safety defaults: clippy::fn null‑check lint, noop method call warnings, and invalid reference casting lint are now deny‑by‑default; recursion lint now catches recursive drops.
- Minor and breaking updates: refined default panic messages, merged io::Sink into io::Empty, raised minimum LLVM to 15, and added documentation for v0 symbol mangling.
Rust 1.73.0
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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.