diff options
Diffstat (limited to 'compiler/rustc_infer/src/traits/util.rs')
| -rw-r--r-- | compiler/rustc_infer/src/traits/util.rs | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/compiler/rustc_infer/src/traits/util.rs b/compiler/rustc_infer/src/traits/util.rs index 1acefcef3b4..74a78f38024 100644 --- a/compiler/rustc_infer/src/traits/util.rs +++ b/compiler/rustc_infer/src/traits/util.rs @@ -200,6 +200,10 @@ impl<'tcx, O: Elaboratable<'tcx>> Elaborator<'tcx, O> { let bound_predicate = elaboratable.predicate().kind(); match bound_predicate.skip_binder() { ty::PredicateKind::Clause(ty::Clause::Trait(data)) => { + // Negative trait bounds do not imply any supertrait bounds + if data.polarity == ty::ImplPolarity::Negative { + return; + } // Get predicates implied by the trait, or only super predicates if we only care about self predicates. let predicates = if self.only_self { tcx.super_predicates_of(data.def_id()) |