The 1.99.1 pre-release is ready for testing. The release is scheduled for October 15. Release notes can be found here.

You can try it out locally by running:

RUSTUP_DIST_SERVER=https://dev-static.rust-lang.org rustup update stable

The index is https://dev-static.rust-lang.org/dist/2026-10-13/index.html.

You can leave feedback on the internals thread.

General feedback about our pre-release process is welcome on this GitHub issue.