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Remap elaborated obligation constness

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This commit is contained in:
Deadbeef 2022-01-29 01:47:58 +11:00
parent 9b75f2d498
commit 08cb878430
1 changed files with 6 additions and 1 deletions
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7
compiler/rustc_infer/src/traits/util.rs
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@ -145,7 +145,12 @@ fn elaborate(&mut self, obligation: &PredicateObligation<'tcx>) {
// Get predicates declared on the trait.
let predicates = tcx.super_predicates_of(data.def_id());
let obligations = predicates.predicates.iter().map(|&(pred, _)| {
let obligations = predicates.predicates.iter().map(|&(mut pred, _)| {
// when parent predicate is non-const, elaborate it to non-const predicates.
if data.constness == ty::BoundConstness::NotConst {
pred = pred.without_const(tcx);
}
predicate_obligation(
pred.subst_supertrait(tcx, &bound_predicate.rebind(data.trait_ref)),
obligation.param_env,