anchor.diff:  Test processTestCode(String code) {
     StringBuffer codeBuffer = new StringBuffer();
     Map<int, StackTraceLine> stackTraceMap = <int, StackTraceLine>{};
  +  List<StackTraceLine> unexpectedLines = <StackTraceLine>[];
     int index = 0;
     int lineNo = 1;
     int columnNo = 1;
  
positive.code:         expectedIndex++;
        }
      }
    }
    if (verbose) {
      print('JavaScript stacktrace:');
  
negative.code:   }
  
    int expectedIndex = 0;
    List<StackTraceLine> unexpectedLines = <StackTraceLine>[];
    for (StackTraceLine line in dartStackTrace) {
      if (expectedIndex < test.expectedLines.length) {
        StackTraceLine expectedLine = test.expectedLines[expectedIndex];
  