Rust: Determinism, Reflection, and the ABI Edge Cases
A heavy rollup day saw fixes for nondeterministic inline assembly output, continued progress on the reflection API refactor, and two new PRs hardening the x86-interrupt calling convention against ICEs. Underlying it all: a steady stream of coordinator JonathanBrouwer rollups moving a large backlog through bors.
Duration: PT2M26S
Episode overview
This episode is a short developer briefing from Rust.
It explains recent repository work in plain language.
- Show: Rust
- Published: 2026-09-08T13:11:26Z
- Audio duration: PT2M26S
Transcript excerpt
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Good evening. It's September 8th, and today's codebase activity centers on tightening up correctness at the compiler's edges.
The standout fix is PR 160197, merged by susitsm, which restricts how LLVM inline assembly location cookies are used. Under the parallel frontend, these cookies were nondeterministic, which meant bitcode output and LTO builds could vary from run to run. That's a real reproducibility hazard, and it's now fixed, at…
A second theme: the reflection API keeps getting refactored. PR 161896 and PR 162294, both from yara-blue, continue stripping data-carrying fields out of TypeKind in favor of dedicated methods on TypeId. This is part of a broader tracking effort, issue 146922, moving from a fat enum to a leaner type-info API. If you…
Third theme: x86-interrupt ABI hardening. Two open PRs from Siech0, 162457 and 162448, both address the same root problem — unsized or zero-sized parameters passed to interrupt handlers causing internal compiler errors. They're adding validation and shared diagnostic notes with the "extern tail" ABI, since the…
Elsewhere, fmease's parser cleanup in PR 162269 removes obsolete recovery code and consolidates attribute-in-invalid-context…
Stru…
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