What's New in Rust 1.72-1.78 Rustacean Station marathon

A live-streamed marathon podcast episode covering Rust releases 1.72 through 1.78. The hosts walk through release notes for Rust 1.72 and 1.72.1, discussing key changes including improved error messages for cfg-disabled items, removal of the const evaluation step limit (now 2 million interpreter steps), uplifted Clippy lints, mpsc Sender now implementing Sync, string::leak stabilization, rustdoc search improvements including function signature search, cargo build script namespace changes (cargo:: prefix), cargo resolver version warnings, and let-else formatting fixes in rustfmt. The episode also includes a live documentation PR to the Rust standard library explaining when string::leak is preferable to into_boxed_str.