1 files changed, 1 insertions, 1 deletions
diff --git a/compiler/rustc_trait_selection/src/traits/auto_trait.rs b/compiler/rustc_trait_selection/src/traits/auto_trait.rs
index 13a09917c03..c6d029ddb65 100644
--- a/compiler/rustc_trait_selection/src/traits/auto_trait.rs
+++ b/compiler/rustc_trait_selection/src/traits/auto_trait.rs
@@ -477,7 +477,7 @@ impl<'tcx> AutoTraitFinder<'tcx> {
         let mut vid_map: FxHashMap<RegionTarget<'cx>, RegionDeps<'cx>> = FxHashMap::default();
         let mut finished_map = FxHashMap::default();
 
-        for constraint in regions.constraints.keys() {
+        for (constraint, _) in &regions.constraints {
             match constraint {
                 &Constraint::VarSubVar(r1, r2) => {
                     {