- Implemented DST coercions for smart pointers, experimental parallel codegen, MSVC linker support, and numerous new library APIs (e.g., iter::once/empty, Extend implementations, wrapping arithmetic, pretty‑print debug formatting, RawFd/Ha...
- Changed core semantics: char case conversion now follows Unicode, mem::align reports minimum alignment (mem::min_align deprecated), the packed attribute is no longer accepted, and associated type defaults are now gated.
- Added deprecation for mem::min_align and introduced several bug‑fixes and compiler optimizations such as smarter typo heuristics and faster fat‑pointer handling.
Rust 1.2.0
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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.