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Accept variadic SysV64, Win64, and Aapcs FnAbis in rustc_public - #165388

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rust-lang:mainfrom
lapla-cogito:issue_163233
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lapla-cogito wants to merge 1 commit into
rust-lang:mainfrom
lapla-cogito:issue_163233

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@lapla-cogito

@lapla-cogito lapla-cogito commented Nov 3, 2026 •

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Stable conversion of FnAbi treated every non-CanonAbi::C variadic function as unreachable. SysV64, Win64, and Aapcs stay distinct after canonicalization, and ExternAbi::supports_c_variadic already allows them.

Closes #163233

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rustbot commented Nov 3, 2026

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This PR changes rustc_public

cc @oli-obk, @celinval, @ouz-a, @makai410

@rustbot rustbot added S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. T-compiler Relevant to the compiler team, which will review and decide on the PR/issue. labels Nov 3, 2026
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rustbot commented Nov 3, 2026

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r? @TaKO8Ki

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rustc_public: stable FnAbi conversion ICEs on extern "sysv64" C-variadics

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