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handle region dependent goals due to infer vars

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This commit is contained in:
lcnr
2025-07-25 12:38:54 +00:00
parent 64a27c2e37
commit b6cbe33aeb
7 changed files with 128 additions and 19 deletions
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12
compiler/rustc_trait_selection/src/solve/fulfill.rs
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@@ -197,6 +197,12 @@ where
delegate.compute_goal_fast_path(goal, obligation.cause.span)
{
match certainty {
// This fast path doesn't depend on region identity so it doesn't
// matter if the goal contains inference variables or not, so we
// don't need to call `push_hir_typeck_potentially_region_dependent_goal`
// here.
//
// Only goals proven via the trait solver should be region dependent.
Certainty::Yes => {}
Certainty::Maybe(_) => {
self.obligations.register(obligation, None);
@@ -234,7 +240,11 @@ where
}
match certainty {
Certainty::Yes => {}
Certainty::Yes => {
if infcx.in_hir_typeck && obligation.has_non_region_infer() {
infcx.push_hir_typeck_potentially_region_dependent_goal(obligation);
}
}
Certainty::Maybe(_) => self.obligations.register(obligation, stalled_on),
}
}