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short-circuit when proj def ids differ

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This commit is contained in:
Michael Goulet 2023-07-27 00:48:51 +00:00
parent 1bb6ae5874
commit 4cc659eb3f
2 changed files with 20 additions and 14 deletions
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11
compiler/rustc_trait_selection/src/traits/select/confirmation.rs
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@ -920,11 +920,12 @@ impl<'cx, 'tcx> SelectionContext<'cx, 'tcx> {
a_data.projection_bounds().filter(|source_projection| {
// Eager normalization means that we can just use can_eq
// here instead of equating and processing obligations.
self.infcx.can_eq(
obligation.param_env,
*source_projection,
target_projection,
)
source_projection.item_def_id() == target_projection.item_def_id()
&& self.infcx.can_eq(
obligation.param_env,
*source_projection,
target_projection,
)
});
let Some(source_projection) = matching_projections.next() else {
return Err(SelectionError::Unimplemented);