Program: 4440
Project: 4440
Buggy source:
private void readHeaders() throws IOException {
  if (_byteReader == null)   throw new ReaderIsNullException();
  String str=_byteReader.readLine();
  if (str == null || str.equals("String_Node_Str"))   throw new IOException();
  if (!CommonUtils.isJava118())   BandwidthStat.HTTP_HEADER_DOWNSTREAM_BANDWIDTH.addData(str.length());
  int code=parseHTTPCode(str,_rfd);
  int[] refQueueInfo={-1,-1,-1};
  while (true) {
    str=_byteReader.readLine();
    if (str == null || str.equals("String_Node_Str"))     break;
    if (!CommonUtils.isJava118())     BandwidthStat.HTTP_HEADER_DOWNSTREAM_BANDWIDTH.addData(str.length());
    if (str.toUpperCase().startsWith("String_Node_Str")) {
      Interval responseRange=parseContentRange(str);
      int low=responseRange.low;
      int high=responseRange.high + 1;
      if (low < _initialReadingPoint || high > _initialReadingPoint + _amountToRead)       throw new ProblemReadingHeaderException("String_Node_Str" + _initialReadingPoint + "String_Node_Str"+ (_initialReadingPoint + _amountToRead - 1)+ "String_Node_Str"+ low+ "String_Node_Str"+ high);
      _initialReadingPoint=low;
      _amountToRead=high - low;
    }
 else     if (HTTPHeaderName.CONTENT_LENGTH.matchesStartOfString(str))     _contentLength=readContentLength(str);
 else     if (HTTPHeaderName.CONTENT_URN.matchesStartOfString(str))     checkContentUrnHeader(str,_rfd.getSHA1Urn());
 else     if (HTTPHeaderName.GNUTELLA_CONTENT_URN.matchesStartOfString(str))     checkContentUrnHeader(str,_rfd.getSHA1Urn());
 else     if (HTTPHeaderName.ALT_LOCATION.matchesStartOfString(str))     readAlternateLocations(str);
 else     if (HTTPHeaderName.QUEUE.matchesStartOfString(str))     parseQueueHeaders(str,refQueueInfo);
 else     if (HTTPHeaderName.SERVER.matchesStartOfString(str))     _server=readServer(str);
 else     if (HTTPHeaderName.AVAILABLE_RANGES.matchesStartOfString(str))     parseAvailableRangesHeader(str,_rfd);
 else     if (HTTPHeaderName.RETRY_AFTER.matchesStartOfString(str))     parseRetryAfterHeader(str,_rfd);
 else     if (HTTPHeaderName.CREATION_TIME.matchesStartOfString(str))     parseCreationTimeHeader(str,_rfd);
 else     if (HTTPHeaderName.FEATURES.matchesStartOfString(str))     parseFeatureHeader(str);
 else     if (HTTPHeaderName.THEX_URI.matchesStartOfString(str))     parseTHEXHeader(str);
  }
  if ((code < 200) || (code >= 300)) {
    if (code == 404)     throw new com.limegroup.gnutella.downloader.FileNotFoundException();
 else     if (code == 410)     throw new NotSharingException();
 else     if (code == 416)     throw new RangeNotAvailableException();
 else     if (code == 503) {
      int min=refQueueInfo[0];
      int max=refQueueInfo[1];
      int pos=refQueueInfo[2];
      if (min != -1 && max != -1 && pos != -1)       throw new QueuedException(min,max,pos);
      if (_rfd.isPartialSource())       throw new RangeNotAvailableException();
      throw new TryAgainLaterException();
    }
 else     throw new UnknownCodeException(code);
  }
}

Fixed version (ground truth):
private void readHeaders() throws IOException {
  if (_byteReader == null)   throw new ReaderIsNullException();
  String str=_byteReader.readLine();
  if (str == null || str.equals("String_Node_Str"))   throw new IOException();
  if (!CommonUtils.isJava118())   BandwidthStat.HTTP_HEADER_DOWNSTREAM_BANDWIDTH.addData(str.length());
  int code=parseHTTPCode(str,_rfd);
  int[] refQueueInfo={-1,-1,-1};
  while (true) {
    str=_byteReader.readLine();
    if (str == null || str.equals("String_Node_Str"))     break;
    if (!CommonUtils.isJava118())     BandwidthStat.HTTP_HEADER_DOWNSTREAM_BANDWIDTH.addData(str.length());
    if (str.toUpperCase().startsWith("String_Node_Str")) {
      Interval responseRange=parseContentRange(str);
      int low=responseRange.low;
      int high=responseRange.high + 1;
      if (low < _initialReadingPoint || high > _initialReadingPoint + _amountToRead)       throw new ProblemReadingHeaderException("String_Node_Str" + _initialReadingPoint + "String_Node_Str"+ (_initialReadingPoint + _amountToRead - 1)+ "String_Node_Str"+ low+ "String_Node_Str"+ high);
      _initialReadingPoint=low;
      _amountToRead=high - low;
    }
 else     if (HTTPHeaderName.CONTENT_LENGTH.matchesStartOfString(str))     _contentLength=readContentLength(str);
 else     if (HTTPHeaderName.CONTENT_URN.matchesStartOfString(str))     checkContentUrnHeader(str,_rfd.getSHA1Urn());
 else     if (HTTPHeaderName.GNUTELLA_CONTENT_URN.matchesStartOfString(str))     checkContentUrnHeader(str,_rfd.getSHA1Urn());
 else     if (HTTPHeaderName.ALT_LOCATION.matchesStartOfString(str))     readAlternateLocations(str);
 else     if (HTTPHeaderName.QUEUE.matchesStartOfString(str))     parseQueueHeaders(str,refQueueInfo);
 else     if (HTTPHeaderName.SERVER.matchesStartOfString(str))     _server=readServer(str);
 else     if (HTTPHeaderName.AVAILABLE_RANGES.matchesStartOfString(str))     parseAvailableRangesHeader(str,_rfd);
 else     if (HTTPHeaderName.RETRY_AFTER.matchesStartOfString(str))     parseRetryAfterHeader(str,_rfd);
 else     if (HTTPHeaderName.CREATION_TIME.matchesStartOfString(str))     parseCreationTimeHeader(str,_rfd);
 else     if (HTTPHeaderName.FEATURES.matchesStartOfString(str))     parseFeatureHeader(str);
 else     if (HTTPHeaderName.THEX_URI.matchesStartOfString(str))     parseTHEXHeader(str);
  }
  if ((code < 200) || (code >= 300)) {
    if (code == 404)     throw new com.limegroup.gnutella.downloader.FileNotFoundException();
 else     if (code == 410)     throw new NotSharingException();
 else     if (code == 416) {
      Iterator iter=_rfd.getAvailableRanges().getAllIntervals();
      while (iter.hasNext()) {
        Interval next=(Interval)iter.next();
        if (_requestedInterval.isSubrange(next))         throw new ProblemReadingHeaderException("String_Node_Str");
      }
      throw new RangeNotAvailableException();
    }
 else     if (code == 503) {
      int min=refQueueInfo[0];
      int max=refQueueInfo[1];
      int pos=refQueueInfo[2];
      if (min != -1 && max != -1 && pos != -1)       throw new QueuedException(min,max,pos);
      throw new TryAgainLaterException();
    }
 else     throw new UnknownCodeException(code);
  }
}