Fix summarization of unqualified references to class members.

pkg/analyzer/lib/src/summary/summarize_elements.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 serialization.elements;
 
 import 'package:analyzer/dart/element/element.dart';
 import 'package:analyzer/dart/element/type.dart';
 import 'package:analyzer/src/dart/element/element.dart';
 import 'package:analyzer/src/dart/element/type.dart';
@@ skipping 1012 matching lines @@
         element is PropertyAccessorElement &&
         !element.isStatic) {
       if (element.name != 'length') {
         throw new StateError('Only "length" property is allowed in constants.');
       }
       Element prefixElement = identifier.prefix.staticElement;
       int prefixRef = serializer._getElementReferenceId(prefixElement);
       int lengthRef = serializer._getLengthPropertyReference(prefixRef);
       return new EntityRefBuilder(reference: lengthRef);
     }
+    if (element is TypeParameterElement) {
+      throw new StateError('Constants may not refer to type parameters.');
+    }
     return new EntityRefBuilder(
         reference: serializer._getElementReferenceId(element));
   }
 
   @override
   EntityRefBuilder serializePropertyAccess(PropertyAccess access) {
     Element element = access.propertyName.staticElement;
     assert(element != null);
     // The only supported instance property accessor - `length`.
     Expression target = access.target;
@@ skipping 200 matching lines @@
       exportNames.add(new LinkedExportNameBuilder(
           name: name,
           dependency: serializeDependency(dependentLibrary),
           unit: unit,
           kind: kind));
     }
     pb.exportNames = exportNames;
     return pb;
   }
 }