Rust 1.81.0 features the stabilization of the `Error` trait for `#![no_std]` libraries, improved sorting algorithms, and the `#[expect]` lint level. New Clippy lints enforce `#[expect]` use and reasons for `#[allow]` attributes https://alternativeto.net/news/2024/9/rust-1-81-0-released-stabilized-error-trait-enhanced-sorting-and-new-lint-features/