bjoernager/rust
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Be better about bound vars

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This commit is contained in:
Michael Goulet 2023-02-06 20:13:42 +00:00
parent 52f82354dc
commit 3f521b3542
4 changed files with 12 additions and 5 deletions
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9
compiler/rustc_trait_selection/src/traits/select/candidate_assembly.rs
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@ -396,7 +396,10 @@ impl<'cx, 'tcx> SelectionContext<'cx, 'tcx> {
// still be provided by a manual implementation for
// this trait and type.
}
ty::Param(..) | ty::Alias(ty::Projection, ..) => {
ty::Param(..)
| ty::Alias(ty::Projection, ..)
| ty::Placeholder(..)
| ty::Bound(..) => {
// In these cases, we don't know what the actual
// type is. Therefore, we cannot break it down
// into its constituent types. So we don't
@ -448,6 +451,10 @@ impl<'cx, 'tcx> SelectionContext<'cx, 'tcx> {
);
self.infcx.probe(|_snapshot| {
if obligation.has_non_region_late_bound() {
return;
}
// The code below doesn't care about regions, and the
// self-ty here doesn't escape this probe, so just erase
// any LBR.