diff options
Diffstat (limited to 'compiler')
| -rw-r--r-- | compiler/rustc_infer/src/traits/util.rs | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/compiler/rustc_infer/src/traits/util.rs b/compiler/rustc_infer/src/traits/util.rs index 674c75fdee5..38ff9343537 100644 --- a/compiler/rustc_infer/src/traits/util.rs +++ b/compiler/rustc_infer/src/traits/util.rs @@ -145,7 +145,12 @@ impl<'tcx> Elaborator<'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, |