- Stabilized language features such as associated constants, new `pub(restricted)` in `thread_local!`, expanded impls for unsized tuples, and increased `repr(align(N))` limit
- Significant compiler and library improvements: macro bug fixes, 29× faster expansion, better error reporting, RELRO support, wasm32‑emscripten and MSP430 targets, O(1) `Iterator::nth` for ranges, and many new trait impls and API stabiliz...
- Cargo updates include moving the API token file location, building binaries in sub‑directories of `src/bin`, versioned `cargo install`, and a no‑fail‑fast benchmark flag
Rust 1.20.0
Official Rust changelog summary with source attribution, release tags, and community reactions.
Track this Rust release note alongside related changelog updates, risky changes, and weekly digest signals from the developer community.
Verify the original release note
Every summary should remain traceable to the original changelog or release source.
Follow this in context
Turn this Rust release note into a weekly digest for the tools you actually use.
Create digestMore Rust changelog updates
Language: allow shortening lifetimes of &mut during unsize coercions and introduce new lints for invalid runtime symbols and c void return types.