Rust: Attribute Tightening and Miri Soundness Fixes
A 21-PR rollup landed October 28th, centered on stricter attribute and conditional-compilation handling plus two Miri soundness fixes. Open proposals would change process exit behavior and control-flow integrity handling for transparent types.
Duration: PT2M26S
Episode overview
This episode is a short developer briefing from Rust.
It explains recent repository work in plain language.
- Show: Rust
- Published: 2026-10-29T13:10:17Z
- Audio duration: PT2M26S
Transcript excerpt
This excerpt keeps the crawler page concise. Listen to the episode or use the RSS feed for the full update.
Good morning, it's Thursday, October 29th, 2026, and this is your Rust briefing.
The lead story is compiler hygiene at scale: most of yesterday's merges came in a single 21 pull request rollup that tightens attributes and conditional compilation, while closing real soundness gaps in Miri.
First, stricter frontend rules. In P-R 159580, the compiler now rejects the cfg attribute in expression positions where removing the code would leave invalid syntax, like adding a conditionally compiled operand. And in P-R 164028, the no link attribute gets a future incompatibility warning, because the feed notes it…
Second, soundness and crash resistance. P-R 164993 fixes copy non overlapping to no longer skip the overlap check when the source is fully uninitialized, which had missed undefined behavior. P-R 164996 adds a missing alignment check in write bytes. Both address the same Miri issue report. Related merges add guards…
Third, docs and backend cleanup. P-R 162808 enables the generate link to definition option for standard library docs to improve navigation as rustdoc evolves. P-R 163672 moves new LLVM targets to the run code generation abstraction, simplifying maintenance and enabling the…
Wha…
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