Program: 21269
Project: 21269
Buggy source:
public void onProcess(Executer exec,String latestLine,StringBuffer buffer){
  System.out.println(latestLine);
  if (latestLine.length() > 0) {
  }
  String match;
  if (latestLine.length() > 0) {
    if ((match=new Regex(latestLine,"String_Node_Str").getMatch(0)) != null) {
      String currentWorkingFile=match.trim();
      this.currentlyWorkingOn=getArchivFile(currentWorkingFile);
      this.fireEvent(JDUnrarConstants.WRAPPER_PROGRESS_NEW_SINGLE_FILE_STARTED);
    }
    if ((match=new Regex(latestLine,"String_Node_Str").getMatch(0)) != null) {
      this.currentVolume=Integer.parseInt(match.trim());
      long ext=this.totalSize / this.volumeNum * (currentVolume - 1);
      if (ext == 0) {
        return;
      }
      try {
        this.speed=ext / ((System.currentTimeMillis() - this.startTime) / 1000);
      }
 catch (      Exception e) {
      }
    }
    if ((match=new Regex(latestLine,"String_Node_Str").getMatch(0)) != null) {
      this.exactProgress=true;
      currentlyWorkingOn.setPercent(Integer.parseInt(match));
      this.fireEvent(JDUnrarConstants.WRAPPER_ON_PROGRESS);
    }
    if (latestLine.startsWith("String_Node_Str")) {
      currentlyWorkingOn.setPercent(100);
      this.fireEvent(JDUnrarConstants.WRAPPER_ON_PROGRESS);
      this.fireEvent(JDUnrarConstants.WRAPPER_PROGRESS_SINGLE_FILE_FINISHED);
    }
    if ((match=new Regex(latestLine,"String_Node_Str").getMatch(0)) != null) {
      this.status=JDUnrarConstants.WRAPPER_EXTRACTION_FAILED_CRC;
      exec.interrupt();
    }
  }
}

Fixed version (ground truth):
public void onProcess(Executer exec,String latestLine,StringBuffer buffer){
  System.out.println(latestLine);
  if (latestLine.length() > 0) {
  }
  String match;
  if (latestLine.length() > 0) {
    if ((match=new Regex(latestLine,"String_Node_Str").getMatch(0)) != null) {
      String currentWorkingFile=match.trim();
      this.currentlyWorkingOn=getArchivFile(currentWorkingFile);
      this.fireEvent(JDUnrarConstants.WRAPPER_PROGRESS_NEW_SINGLE_FILE_STARTED);
    }
    if ((match=new Regex(latestLine,"String_Node_Str").getMatch(0)) != null) {
      this.currentVolume=Integer.parseInt(match.trim());
      long ext=this.totalSize / this.volumeNum * (currentVolume - 1);
      if (ext == 0) {
        return;
      }
      try {
        this.speed=ext / ((System.currentTimeMillis() - this.startTime) / 1000);
      }
 catch (      Exception e) {
      }
    }
    if ((match=new Regex(latestLine,"String_Node_Str").getMatch(0)) != null) {
      this.exactProgress=true;
      currentlyWorkingOn.setPercent(Integer.parseInt(match));
      this.fireEvent(JDUnrarConstants.WRAPPER_ON_PROGRESS);
    }
    if (latestLine.startsWith("String_Node_Str")) {
      currentlyWorkingOn.setPercent(100);
      this.fireEvent(JDUnrarConstants.WRAPPER_ON_PROGRESS);
      this.fireEvent(JDUnrarConstants.WRAPPER_PROGRESS_SINGLE_FILE_FINISHED);
    }
    if ((match=new Regex(latestLine,"String_Node_Str").getMatch(0)) != null) {
      this.status=JDUnrarConstants.WRAPPER_EXTRACTION_FAILED_CRC;
      System.err.println("String_Node_Str" + match);
      exec.interrupt();
    }
    if ((match=new Regex(latestLine,"String_Node_Str").getMatch(0)) != null) {
      this.status=JDUnrarConstants.WRAPPER_EXTRACTION_FAILED_CRC;
      exec.interrupt();
    }
  }
}