anchor.diff:      hasParserError = true;
     }
   
  +  @override
     Token expectedExpression(Token token) {
       if (token is ErrorToken) {
         reportErrorToken(token);
  
positive.code:     push(new VariableDeclaration(identifier.name, initializer: initializer));
    }
  
    void endInitializedIdentifier() {
      // TODO(ahe): Use [InitializedIdentifier] here?
      debugEvent("InitializedIdentifier");
  
negative.code:     }
    }
  
    @override
    void handleOperator(Token token) {
      debugEvent("Operator");
      push(new Operator(token.stringValue)..fileOffset = token.charOffset);
  