Rust 1.98.1 pre-release testing

The 1.98.1 pre-release is ready for testing. The release is scheduled for September 3. 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/2026-09-02/index.html.

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

I currently use the official Docker images for all my Rust CI; would it be possible for future prereleases to be published as docker tags? This would make it easier for me to test prereleases and provide feedback.

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