Rust 1.73: what's new, what was stabilized

19 APIs stabilized

{integer}::div_ceil, {integer}::next_multiple_of, {integer}::checked_next_multiple_of, std::ffi::FromBytesUntilNulError, std::os::unix::fs::chown, std::os::unix::fs::fchown, std::os::unix::fs::lchown, LocalKey::<Cell<T>>::get, LocalKey::<Cell<T>>::set, LocalKey::<Cell<T>>::take, LocalKey::<Cell<T>>::replace, LocalKey::<RefCell<T>>::with_borrow, LocalKey::<RefCell<T>>::with_borrow_mut, LocalKey::<RefCell<T>>::set, LocalKey::<RefCell<T>>::take, LocalKey::<RefCell<T>>::replace, rc::Weak::new, sync::Weak::new, NonNull::as_ref

Can it break my build?

The release lists these compatibility notes. Most only affect rare code, but read them before you raise your toolchain in CI:

Use it

rustup update stable        # get the newest release
rustup install 1.73          # or exactly this one
rustup override set 1.73     # pin a project to it

To require at least this version from users of your crate, set rust-version = "1.73" under [package] in Cargo.toml. Cargo then refuses to build it on older compilers with a clear message, and with resolver 3 (the default on the 2024 edition, Rust 1.85+) it also prefers dependency versions that support it.

Full release notes

Release notes from the Rust project's RELEASES.md (MIT or Apache-2.0); summaries above are ours.

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