Rust 1.97.0 made symbol-mangling scheme v0 the default, added Cargo configuration for warning management so developers can silence, warn on, or deny specific warnings without invalidating build caches, and made linker output visible by default so real problems are no longer masked.
The release also stabilized several new bit-manipulation APIs for integers and NonZero types, plus made char::is_control usable in const contexts.
Full details: https://blog.rust-lang.org/2026/07/09/Rust-1.97.0/
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