Fix for invalid 'extends/implements/with SomeEnum'.

pkg/analyzer/test/src/summary/resynthesize_common.dart

 // Copyright (c) 2015, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 library test.src.serialization.elements_test;
 
 import 'package:analyzer/dart/ast/ast.dart';
 import 'package:analyzer/dart/ast/standard_resolution_map.dart';
 import 'package:analyzer/dart/constant/value.dart';
 import 'package:analyzer/dart/element/element.dart';
@@ skipping 2904 matching lines @@
   }
 
   test_enum_values() {
     checkLibrary('enum E { v1, v2 }');
   }
 
   test_enums() {
     checkLibrary('enum E1 { v1 } enum E2 { v2 }');
   }
 
+  test_error_extendsEnum() {
+    checkLibrary('''
+enum E {a, b, c}
+
+class M {}
+
+class A extends E {
+  foo() {}
+}
+
+class B implements E, M {
+  foo() {}
+}
+
+class C extends Object with E, M {
+  foo() {}
+}
+
+class D = Object with M, E;
+''');
+  }
+
   test_executable_parameter_type_typedef() {
     checkLibrary(r'''
 typedef F(int p);
 main(F f) {}
 ''');
   }
 
   test_export_class() {
     addLibrarySource('/a.dart', 'class C {}');
     checkLibrary('export "a.dart";');
@@ skipping 2082 matching lines @@
       fail('Unexpectedly tried to get unlinked summary for $uri');
     }
     return serializedUnit;
   }
 
   @override
   bool hasLibrarySummary(String uri) {
     return true;
   }
 }