The Rust team is excited to announce the release of Rust 1.88.0, a major update that brings several new features and improvements to the programming language. With this update, Rust users can now enjoy enhanced performance, reliability, and ease of use.
One of the key features in Rust 1.88.0 is let chains, which allows &&-chaining let statements inside if and while conditions, even intermingling with boolean expressions. This feature simplifies code and reduces nesting requirements.
Another notable feature is naked functions, which provide full control over the generated assembly for a particular function. Naked functions are marked with the #[unsafe(naked)] attribute and consist of a single naked_asm! call.
Boolean configuration has also been improved, with cfg(predicate) now supporting boolean literals (true and false). This allows users to configure their code more directly and explicitly.
Cargo 1.88.0 introduces automatic cache cleaning, which removes old files from the home directory after a certain period. This feature ensures that disk usage remains manageable.
Additionally, several APIs have been stabilized, including Cell::update, HashMap::extract_if, HashSet::extract_if, hint::select_unpredictable, and proc_macro::Span::line.
The i686-pc-windows-gnu target has also been demoted to Tier 2 due to reduced testing. However, this change will not affect users immediately, as the compiler and standard library tools will still be distributed by rustup for this target.
Rust 1.88.0 is the result of collaboration from many people in the Rust community. We would like to thank everyone who contributed to this update, making it possible for us to bring you these exciting features and improvements.
Source: https://blog.rust-lang.org/2025/06/26/Rust-1.88.0