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Rollup merge of #120882 - RalfJung:set-discriminant, r=compiler-errors

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interpret/write_discriminant: when encoding niched variant, ensure the stored value matches

Cc https://github.com/rust-lang/unsafe-code-guidelines/issues/487
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Matthias Krüger 2024-02-11 01:37:55 +01:00 • committed by GitHub
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compiler/rustc_middle/src/mir/interpret/error.rs
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@ -356,6 +356,8 @@ pub enum UndefinedBehaviorInfo<'tcx> {
UninhabitedEnumVariantWritten(VariantIdx),
/// An uninhabited enum variant is projected.
UninhabitedEnumVariantRead(VariantIdx),
/// Trying to set discriminant to the niched variant, but the value does not match.
InvalidNichedEnumVariantWritten { enum_ty: Ty<'tcx> },
/// ABI-incompatible argument types.
AbiMismatchArgument { caller_ty: Ty<'tcx>, callee_ty: Ty<'tcx> },
/// ABI-incompatible return types.