- Major breaking syntax changes: removed many keywords, switched `import` to `use` and `use` to `extern`, eliminated args vector and deprecated argument modes, removed typestate, and replaced `pub/priv` export lists.
- Added substantial features: operator overloading via core::ops, structs replace classes, new pipe/arc concurrency primitives and futures based on pipes, preliminary JIT and precise GC, improved task API and error reporting.
- Security and stability upgrades: all hash functions now use randomized SipHash, static strings/vectors stored in constant memory, coherent trait implementations, and extensive compiler architectural improvements.
Rust 0.4
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.