Issue 21549. Fix for infinite loop in the Angular expression parser (Dart version).

pkg/analyzer/lib/src/generated/engine.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.
 
 // This code was auto-generated, is not intended to be edited, and is subject to
 // significant change. Please see the README file for more information.
 
 library engine;
 
 import 'dart:collection';
@@ skipping 6593 matching lines @@
       formatterToken = name.endToken.next;
       // parse arguments
       List<AngularFormatterArgument> arguments = <AngularFormatterArgument>[];
       while (formatterToken.type != TokenType.EOF) {
         // skip ":"
         Token colonToken = formatterToken;
         if (colonToken.type == TokenType.COLON) {
           formatterToken = formatterToken.next;
         } else {
           _reportErrorForToken(AngularCode.MISSING_FORMATTER_COLON, colonToken);
+          break;
         }
         // parse argument
         Expression argument = _parseDartExpressionInToken(formatterToken);
         arguments.add(new AngularFormatterArgument(colonToken, argument));
         // next token
         formatterToken = argument.endToken.next;
       }
       formatters.add(new AngularFormatterNode(barToken, name, arguments));
     }
     // done
@@ skipping 6936 matching lines @@
     _index++;
     if (_index >= _manager._workQueues[_queueIndex].length) {
       _index = 0;
       _queueIndex++;
       while (_queueIndex < _manager._workQueues.length && _manager._workQueues[_queueIndex].isEmpty) {
         _queueIndex++;
       }
     }
   }
 }