Index: pkg/compiler/lib/src/js_backend/element_strategy.dart |
diff --git a/pkg/compiler/lib/src/js_backend/element_strategy.dart b/pkg/compiler/lib/src/js_backend/element_strategy.dart |
index 9ab811484f4c5ebb9a1aef0f579baceedb2fb83e..ee4c02a0725fc5e405d1565306c7920187f5693d 100644 |
--- a/pkg/compiler/lib/src/js_backend/element_strategy.dart |
+++ b/pkg/compiler/lib/src/js_backend/element_strategy.dart |
@@ -38,7 +38,8 @@ class ElementBackendStrategy implements BackendStrategy { |
ElementBackendStrategy(this._compiler); |
- ClosedWorldRefiner createClosedWorldRefiner(ClosedWorldImpl closedWorld) => |
+ ClosedWorldRefiner createClosedWorldRefiner( |
+ covariant ClosedWorldImpl closedWorld) => |
closedWorld; |
Sorter get sorter => const ElementSorter(); |