Index: pkg/compiler/lib/src/kernel/kernel_backend_strategy.dart |
diff --git a/pkg/compiler/lib/src/kernel/kernel_backend_strategy.dart b/pkg/compiler/lib/src/kernel/kernel_backend_strategy.dart |
index f09c86b210d6969bb55f4de14d8bda76bde7bce1..40acf4bf13bdf7f0885d0f1ff80dbd4d0ac850ca 100644 |
--- a/pkg/compiler/lib/src/kernel/kernel_backend_strategy.dart |
+++ b/pkg/compiler/lib/src/kernel/kernel_backend_strategy.dart |
@@ -46,7 +46,8 @@ class KernelBackendStrategy implements BackendStrategy { |
KernelBackendStrategy(this._compiler); |
@override |
- ClosedWorldRefiner createClosedWorldRefiner(KernelClosedWorld closedWorld) { |
+ ClosedWorldRefiner createClosedWorldRefiner( |
+ covariant KernelClosedWorld closedWorld) { |
return closedWorld; |
} |