- Expanded std::fs with DirEntry optimizations, full OS metadata access and new symlink metadata functions; added raw‑handle traits (FromRawFd/AsRawFd on Unix, FromRawHandle/AsRawHandle on Windows) and OS‑specific symlink creators.
- Added many std library features and fixes: split_whitespace, From<u32> for Ipv4Addr, IntoIterator for mpsc::Receiver, O(1) slice iterator methods, Default for Arc and AtomicPtr, abs overflow panic in debug, stabilized Cloned and Incoming...
- Improved compiler ergonomics and toolchain support: richer error explanations with the explain flag, 32% faster bootstrap, experimental MUSL target support, cargo rustc custom flags, Android PIE executables, and a lint for mixing repr(C)...
Rust 1.1.0
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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.