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fix ICE with references to infinite structs in consts

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This commit is contained in:
Lukas Markeffsky 2025-01-13 23:41:37 +01:00
parent 2ae9916816
commit 7a3c4f73ae
5 changed files with 111 additions and 6 deletions
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7
compiler/rustc_trait_selection/src/traits/project.rs
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@ -1148,7 +1148,9 @@ fn assemble_candidates_from_impls<'cx, 'tcx>(
// If returned by `struct_tail` this is the empty tuple.
| ty::Tuple(..)
// Integers and floats are always Sized, and so have unit type metadata.
| ty::Infer(ty::InferTy::IntVar(_) | ty::InferTy::FloatVar(..)) => true,
| ty::Infer(ty::InferTy::IntVar(_) | ty::InferTy::FloatVar(..))
// This happens if we reach the recursion limit when finding the struct tail.
| ty::Error(..) => true,
// We normalize from `Wrapper<Tail>::Metadata` to `Tail::Metadata` if able.
// Otherwise, type parameters, opaques, and unnormalized projections have
@ -1179,8 +1181,7 @@ fn assemble_candidates_from_impls<'cx, 'tcx>(
| ty::Alias(..)
| ty::Bound(..)
| ty::Placeholder(..)
| ty::Infer(..)
| ty::Error(_) => {
| ty::Infer(..) => {
if tail.has_infer_types() {
candidate_set.mark_ambiguous();
}