Index: pkg/compiler/lib/src/types/type_mask.dart |
diff --git a/pkg/compiler/lib/src/types/type_mask.dart b/pkg/compiler/lib/src/types/type_mask.dart |
index c255b6040d2fabecfe9e5e58cb8abe2226e04f6e..3339738fa875298cccc42739cb124a1bfc495b94 100644 |
--- a/pkg/compiler/lib/src/types/type_mask.dart |
+++ b/pkg/compiler/lib/src/types/type_mask.dart |
@@ -75,7 +75,7 @@ class TypeMaskStrategy implements SelectorConstraintsStrategy { |
* operations on it are not guaranteed to be precise and they may |
* yield conservative answers that contain too many classes. |
*/ |
-abstract class TypeMask implements ReceiverConstraint { |
+abstract class TypeMask implements ReceiverConstraint, AbstractValue { |
factory TypeMask(ClassElement base, |
int kind, |
bool isNullable, |