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| author | 许杰友 Jieyou Xu (Joe) <39484203+jieyouxu@users.noreply.github.com> | 2024-10-18 14:52:25 +0100 |
|---|---|---|
| committer | GitHub <noreply@github.com> | 2024-10-18 14:52:25 +0100 |
| commit | 765e8c75b0b3dcfd9bb4de67c5a199d4c58f2db5 (patch) | |
| tree | 23505354072a3a4027b84438d70eb0310b8dcbd0 /library/std/src/sys/pal/unix/stack_overflow.rs | |
| parent | 39af44dae986e91c8c7ea1a994781e8fb7fb6751 (diff) | |
| parent | 781bff049905d325bb877935978f1bce8ea6af86 (diff) | |
| download | rust-765e8c75b0b3dcfd9bb4de67c5a199d4c58f2db5.tar.gz rust-765e8c75b0b3dcfd9bb4de67c5a199d4c58f2db5.zip | |
Rollup merge of #131864 - lrh2000:upcast_reorder, r=WaffleLapkin
Never emit `vptr` for empty/auto traits Emiting `vptr`s for empty/auto traits is unnecessary (#114942) and causes unsoundness in `trait_upcasting` (#131813). This PR should ensure that we never emit vtables for such traits. See the linked issues for more details. I'm not sure if I can add tests for the vtable layout. So this PR only adds tests for the soundness hole (i.e., the segmentation fault will disappear after this PR). Fixes #114942 Fixes #131813 Cc #65991 (tracking issue for `trait_upcasting`) r? `@WaffleLapkin` (per https://github.com/rust-lang/rust/issues/131813#issuecomment-2419969745)
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