Fix for issue 20930

pkg/analyzer/lib/src/generated/resolver.dart

 // Copyright (c) 2014, 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 engine.resolver;
 
 import "dart:math" as math;
 import 'dart:collection';
 
 import 'ast.dart';
@@ skipping 14849 matching lines @@
             StaticWarningCode.NON_TYPE_IN_CATCH_CLAUSE,
             typeName,
             [typeName.name]);
       } else if (_isTypeNameInAsExpression(node)) {
         reportErrorForNode(
             StaticWarningCode.CAST_TO_NON_TYPE,
             typeName,
             [typeName.name]);
       } else if (_isTypeNameInIsExpression(node)) {
         reportErrorForNode(
-            StaticWarningCode.TYPE_TEST_NON_TYPE,
+            StaticWarningCode.TYPE_TEST_WITH_UNDEFINED_NAME,
             typeName,
             [typeName.name]);
       } else if ((redirectingConstructorKind =
           _getRedirectingConstructorKind(node)) != null) {
         ErrorCode errorCode =
             (redirectingConstructorKind == RedirectingConstructorKind.CONST ?
                 CompileTimeErrorCode.REDIRECT_TO_NON_CLASS :
                 StaticWarningCode.REDIRECT_TO_NON_CLASS);
         reportErrorForNode(errorCode, typeName, [typeName.name]);
       } else if (_isTypeNameInTypeArgumentList(node)) {
@@ skipping 49 matching lines @@
             StaticWarningCode.NON_TYPE_IN_CATCH_CLAUSE,
             typeName,
             [typeName.name]);
       } else if (_isTypeNameInAsExpression(node)) {
         reportErrorForNode(
             StaticWarningCode.CAST_TO_NON_TYPE,
             typeName,
             [typeName.name]);
       } else if (_isTypeNameInIsExpression(node)) {
         reportErrorForNode(
-            StaticWarningCode.TYPE_TEST_NON_TYPE,
+            StaticWarningCode.TYPE_TEST_WITH_NON_TYPE,
             typeName,
             [typeName.name]);
       } else if ((redirectingConstructorKind =
           _getRedirectingConstructorKind(node)) != null) {
         ErrorCode errorCode =
             (redirectingConstructorKind == RedirectingConstructorKind.CONST ?
                 CompileTimeErrorCode.REDIRECT_TO_NON_CLASS :
                 StaticWarningCode.REDIRECT_TO_NON_CLASS);
         reportErrorForNode(errorCode, typeName, [typeName.name]);
       } else if (_isTypeNameInTypeArgumentList(node)) {
@@ skipping 1313 matching lines @@
    * library.
    */
   final HashSet<String> members = new HashSet<String>();
 
   /**
    * Names of resolved or unresolved class members that are read in the
    * library.
    */
   final HashSet<String> readMembers = new HashSet<String>();
 }