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Rollup merge of #137298 - compiler-errors:mir-wf, r=lcnr

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Check signature WF when lowering MIR body

Alternative to #137233.

https://github.com/rust-lang/rust/pull/137233#issuecomment-2667879143

Fixes https://github.com/rust-lang/rust/issues/137186

We do this check in `mir_drops_elaborated_and_const_checked` and not during `mir_promoted` because that may result in borrowck cycles if WF requires looking into an opaque hidden type. This causes some TAIT tests to fail unnecessarily.

r? lcnr

try-job: test-various
This commit is contained in:
许杰友 Jieyou Xu (Joe) 2025-03-05 21:46:39 +08:00 • committed by GitHub
commit 5df9a9f45c
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33 changed files with 176 additions and 76 deletions
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2
compiler/rustc_middle/src/traits/mod.rs
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@ -266,7 +266,7 @@ pub enum ObligationCauseCode<'tcx> {
},
/// Constant expressions must be sized.
ConstSized,
SizedConstOrStatic,
/// `static` items must have `Sync` type.
SharedStatic,