diff options
| -rw-r--r-- | src/librustc_lint/unused.rs | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/src/librustc_lint/unused.rs b/src/librustc_lint/unused.rs index 906579a1ae0..fab618d9c8e 100644 --- a/src/librustc_lint/unused.rs +++ b/src/librustc_lint/unused.rs @@ -68,7 +68,7 @@ impl<'a, 'tcx> LateLintPass<'a, 'tcx> for UnusedResults { ty::Adt(def, _) => check_must_use(cx, def.did, s.span, "", ""), ty::Opaque(def, _) => { let mut must_use = false; - for (predicate, _) in cx.tcx.predicates_of(def).predicates { + for (predicate, _) in &cx.tcx.predicates_of(def).predicates { if let ty::Predicate::Trait(ref poly_trait_predicate) = predicate { let trait_ref = poly_trait_predicate.skip_binder().trait_ref; if check_must_use(cx, trait_ref.def_id, s.span, "implementer of ", "") { |