Announcing Rust 1.98.1

The Rust team has released an updated point version of Rust, 1.98.1. Rust is a programming language that enables developers to create dependable and efficient software. Updating to Rust 1.98.1 is straightforward for those with an earlier version of Rust installed via rustup. If it hasn't been installed yet, rustup can be obtained from the relevant page on the Rust website.

The 1.98.1 release addresses a miscompilation issue in vtable generation. In Rust 1.98.0, under certain conditions, rustc would inadvertently generate a trait object vtable containing a null pointer instead of a function pointer. This could result in unpredictable behavior when the emitted code is executed. In some instances, this might only trigger segmentation faults due to the null pointer being read, but it's also possible for it to cause arbitrary effects, as is common with undefined behavior (UB).

If you're interested in assisting the Rust team with future releases, you can experiment with the beta (rustup default beta) and nightly (rustup default nightly) channels on your local machine or in your continuous integration (CI) systems. Any bugs encountered should be reported to the team. Numerous individuals collaborated to produce Rust 1.98.1. The team expressed their gratitude to everyone involved.