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cloud.google.com·7h ago
Software Engineering
Rust Blog·Sep 3·5 min read
Announcing Rust 1.98.1
TL;DR
Rust 1.98.1 has been released, addressing a critical issue in vtable generation that could lead to undefined behavior in applications. This update ensures more reliable and efficient software development.
✦ Why It Matters
Upgrade to Rust 1.98.1 today to ensure your applications are free from critical vtable generation bugs.
Key Takeaways
- Run 'rustup update stable' to upgrade to Rust 1.98.1.
- Test future releases using the beta and nightly channels.
- Report any bugs you encounter during testing.
- Stay informed about Rust updates to ensure software reliability.
Full Summary
Rust 1.98.1 is a point release that fixes a significant bug found in version 1.98.0 related to vtable generation for trait objects. In certain scenarios, the Rust compiler (rustc) would generate a vtable containing a null pointer instead of a valid function pointer, resulting in undefined behavior in the compiled code.
This could manifest as segmentation faults or potentially lead to arbitrary effects, which is a hallmark of undefined behavior. Users who have rustup installed can update to this version effortlessly with a simple command.
Additionally, the Rust team encourages users to test upcoming releases through the beta and nightly channels and report any bugs encountered. The collaborative effort of many contributors made this release possible.