MalformedType used for all invalid type annotations.

tests/language/type_variable_scope2_test.dart

Index: tests/language/type_variable_scope2_test.dart
diff --git a/tests/language/type_variable_scope2_test.dart b/tests/language/type_variable_scope2_test.dart
index 1c039142f223ac7f69373bd785c14db3c23a51bb..5c018a6979b28a89da89589f0a09c113d1131d51 100644
--- a/tests/language/type_variable_scope2_test.dart
+++ b/tests/language/type_variable_scope2_test.dart
@@ -26,6 +26,7 @@ main() {
   try {
     Expect.isTrue(Foo.m() is Foo);
   } on TypeError catch (error) {
+    print(error);
     got_type_error = true;
   }
   // Type error in checked mode only.