Rust: Stack Limits, Attribute Cleanup, and Soundness Fixes
The compiler's default stack size jumped to 16 MiB with the removal of a long-standing workaround, while a wave of PRs continued untangling attributes from rustc_hir and fixing memory-safety edge cases in the standard library.
Duration: PT2M40S
Episode overview
This episode is a short developer briefing from Rust.
It explains recent repository work in plain language.
- Show: Rust
- Published: 2026-08-10T13:09:07Z
- Audio duration: PT2M40S
Transcript excerpt
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Good day, and welcome to Rust for August 10th, 2026.
The headline today is PR 160535 from Chris Denton: the default stack size is now 16 MiB, and with it goes `ensure_sufficient_stack`, a workaround that's been patched around the compiler for years. It closes out two long-standing issues, numbers 93237 and 108499. This is the kind of change that quietly removes a…
The second theme is architectural cleanup. Mejrs is leading an effort to split attribute handling out of rustc_hir into its own crate, called rustc_attr_ir. PR 160782 fixes up lang item imports after that split, and a follow-up, PR 160846, extends the new imports to more crates. This is foundational work — not…
Third, a cluster of soundness fixes in the standard library. Joboet's PR 160848 addresses aliasing violations when wrapping opaque C types — a real unsoundness affecting platforms like AIX where mutable references from pthread invalidate other pointers. Im-lunex's PR 160817 fixes similar undefined behavior in…
Elsewhere, folkertdev's PR 159746 stabilizes c-variadic naked functions, and jdonszelmann's PR 158447 reworks how type and const inference variables resolve to their root — flagged explicitly as having…
What to…
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