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 753faf24ca7976dfd3d45f8945776d20709bd502..d531cb3009a42032f41cb33282cfe2d53c378225 100644 |
--- a/pkg/compiler/lib/src/types/type_mask.dart |
+++ b/pkg/compiler/lib/src/types/type_mask.dart |
@@ -22,7 +22,8 @@ abstract class TypeMask { |
factory TypeMask.exact(ClassElement base, ClassWorld classWorld) { |
assert(invariant(base, classWorld.isInstantiated(base), |
- message: "Cannot create extact type mask for uninstantiated class")); |
+ message: "Cannot create extact type mask for uninstantiated class " |
+ "${base.name}")); |
return new FlatTypeMask.exact(base); |
} |