Program: 21088
Project: 21088
Buggy source:
/** 
 * Gibt alle downloadlinks zum übergebenen link zurück. d.h. alle links die zu dem archiv gehören
 * @param downloadLink
 * @return
 */
private ArrayList<DownloadLink> getArchiveList(DownloadLink downloadLink){
  ArrayList<DownloadLink> ret=new ArrayList<DownloadLink>();
  File file;
  int type=JDUnrar.getArchivePartType(downloadLink);
  String name=null;
  int nums=0;
  int i=0;
switch (type) {
case JDUnrarConstants.NO_START_PART:
case JDUnrarConstants.MULTIPART_START_PART:
case JDUnrarConstants.MULTIPART_START_PART_V2:
    name=this.getArchiveName(downloadLink);
  String test=null;
if ((test=new Regex(downloadLink.getFileOutput(),"String_Node_Str").getMatch(0)) != null) {
  nums=test.length();
  i=1;
  while ((file=new File(new File(downloadLink.getFileOutput()).getParentFile(),name + "String_Node_Str" + Formatter.fillString(i + "String_Node_Str","String_Node_Str","String_Node_Str",nums)+ "String_Node_Str")).exists() || JDUtilities.getController().getDownloadLinkByFileOutput(file,LinkStatus.FINISHED) != null) {
    DownloadLink dl=JDUtilities.getController().getDownloadLinkByFileOutput(file,LinkStatus.FINISHED);
    if (dl == null)     dl=JDUtilities.getController().getDownloadLinkByFileOutput(file,LinkStatus.ERROR_ALREADYEXISTS);
    ret.add(dl);
    i++;
  }
  break;
}
 else if ((test=new Regex(downloadLink.getFileOutput(),"String_Node_Str").getMatch(0)) != null) {
  ret.add(downloadLink);
  i=0;
  nums=-1;
  for (int a=5; a > 0; a--) {
    String len="String_Node_Str";
    for (int b=a; b > 0; b--) {
      len=len + "String_Node_Str";
    }
    if (new File(test + len).exists()) {
      nums=a;
      break;
    }
  }
  if (nums != -1) {
    while ((file=new File(new File(downloadLink.getFileOutput()).getParentFile(),name + "String_Node_Str" + Formatter.fillString(i + "String_Node_Str","String_Node_Str","String_Node_Str",nums))).exists() || JDUtilities.getController().getDownloadLinkByFileOutput(file,LinkStatus.FINISHED) != null) {
      DownloadLink dl=JDUtilities.getController().getDownloadLinkByFileOutput(file,LinkStatus.FINISHED);
      if (dl == null)       dl=JDUtilities.getController().getDownloadLinkByFileOutput(file,LinkStatus.ERROR_ALREADYEXISTS);
      ret.add(dl);
      i++;
    }
  }
}
break;
case JDUnrarConstants.SINGLE_PART_ARCHIVE:
ret.add(downloadLink);
break;
}
return ret;
}

Fixed version (ground truth):
/** 
 * Gibt alle downloadlinks zum übergebenen link zurück. d.h. alle links die zu dem archiv gehören
 * @param downloadLink
 * @return
 */
private ArrayList<DownloadLink> getArchiveList(DownloadLink downloadLink){
  ArrayList<DownloadLink> ret=new ArrayList<DownloadLink>();
  File file;
  int type=JDUnrar.getArchivePartType(downloadLink);
  String name=null;
  int nums=0;
  int i=0;
switch (type) {
case JDUnrarConstants.NO_START_PART:
case JDUnrarConstants.MULTIPART_START_PART:
case JDUnrarConstants.MULTIPART_START_PART_V2:
    name=this.getArchiveName(downloadLink);
  String test=null;
if ((test=new Regex(downloadLink.getFileOutput(),"String_Node_Str").getMatch(0)) != null) {
  nums=test.length();
  i=1;
  while ((file=new File(new File(downloadLink.getFileOutput()).getParentFile(),name + "String_Node_Str" + Formatter.fillString(i + "String_Node_Str","String_Node_Str","String_Node_Str",nums)+ "String_Node_Str")).exists() || JDUtilities.getController().getDownloadLinkByFileOutput(file,LinkStatus.FINISHED) != null) {
    DownloadLink dl=JDUtilities.getController().getDownloadLinkByFileOutput(file,LinkStatus.FINISHED);
    if (dl == null)     dl=JDUtilities.getController().getDownloadLinkByFileOutput(file,LinkStatus.ERROR_ALREADYEXISTS);
    if (dl == null)     dl=JDUtilities.getController().getDownloadLinkByFileOutput(file,null);
    if (dl != null)     ret.add(dl);
    i++;
  }
  break;
}
 else if ((test=new Regex(downloadLink.getFileOutput(),"String_Node_Str").getMatch(0)) != null) {
  ret.add(downloadLink);
  i=0;
  nums=-1;
  for (int a=5; a > 0; a--) {
    String len="String_Node_Str";
    for (int b=a; b > 0; b--) {
      len=len + "String_Node_Str";
    }
    if (new File(test + len).exists()) {
      nums=a;
      break;
    }
  }
  if (nums != -1) {
    while ((file=new File(new File(downloadLink.getFileOutput()).getParentFile(),name + "String_Node_Str" + Formatter.fillString(i + "String_Node_Str","String_Node_Str","String_Node_Str",nums))).exists() || JDUtilities.getController().getDownloadLinkByFileOutput(file,LinkStatus.FINISHED) != null) {
      DownloadLink dl=JDUtilities.getController().getDownloadLinkByFileOutput(file,LinkStatus.FINISHED);
      if (dl == null)       dl=JDUtilities.getController().getDownloadLinkByFileOutput(file,LinkStatus.ERROR_ALREADYEXISTS);
      if (dl == null)       dl=JDUtilities.getController().getDownloadLinkByFileOutput(file,null);
      if (dl != null)       ret.add(dl);
      i++;
    }
  }
}
break;
case JDUnrarConstants.SINGLE_PART_ARCHIVE:
ret.add(downloadLink);
break;
}
return ret;
}