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The Wire · Showcase

COMPILER FIXES YIELD SEMANTICS WHILE TEAM WELCOMES THREE NEW CONTRIBUTORS

By RepoJournal · Filed · About Rust

Rust's async drop implementation got the correctness fix it needed overnight, and the standards committee just expanded.

The compiler team shipped a critical fix to yield terminator dataflow that corrects how the drop target and unwinding are handled [1]. This matters because the previous implementation confused these two paths, which breaks async drops. The fix comes bundled with documentation that clarifies the semantics for future maintainers [1]. In parallel, the team expanded its contributor roster, welcoming @Darksonn, @LawnGnome, and @aapoalas as new libs-contributors [2]. On the infrastructure side, libz-sys 1.1.29 shipped with loongarch architecture support [3], fixing builds on that platform by including missing CMakeLists.txt references [4]. The compiler also cleaned up visibility in value_analysis.rs and removed unused functions [5], keeping the codebase tighter as we approach the next release cycle.

Action items

References

  1. [1] Rollup merge of #156875 - cjgillot:yield-drop-resume, r=oli-obk rust-lang/rust
  2. [2] Add 3 new libs-contributors ↗ rust-lang/team
  3. [3] 1.1.29 ↗ rust-lang/libz-sys
  4. [4] zlib-ng: Include loongarch architecture folder ↗ rust-lang/libz-sys
  5. [5] Rollup merge of #157004 - nnethercote:value_analysis-visibility, r=cjgillot rust-lang/rust

FAQ

What changed in Rust on May 31, 2026?
Rust's async drop implementation got the correctness fix it needed overnight, and the standards committee just expanded.
What should Rust teams do about it?
Review yield semantics changes in your async code if you're using drop in futures • Update libz-sys to 1.1.29 if building for loongarch64 • Monitor compiler rollups for potential regressions in coroutine transforms
Which Rust repositories shipped on May 31, 2026?
rust-lang/rust, rust-lang/team, rust-lang/libz-sys

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