Program: 20684
Project: 20684
Buggy source:
@Override public void handleFree(DownloadLink downloadLink) throws Exception, PluginException {
  requestFileInformation(downloadLink);
  int minutes=0, seconds=0;
  Regex limits=br.getRegex("String_Node_Str");
  String mins=limits.getMatch(0);
  String secs=limits.getMatch(1);
  if (secs == null)   secs=br.getRegex("String_Node_Str").getMatch(0);
  if (mins != null)   minutes=Integer.parseInt(mins);
  if (secs != null)   seconds=Integer.parseInt(secs);
  int waittime=((60 * minutes) + seconds + 1) * 1000;
  if (waittime > 1000)   throw new PluginException(LinkStatus.ERROR_IP_BLOCKED,waittime);
  br.setFollowRedirects(false);
  br.getHeaders().put("String_Node_Str","String_Node_Str");
  final String fileID=new Regex(downloadLink.getDownloadURL(),"String_Node_Str").getMatch(0);
  br.getPage("String_Node_Str" + fileID);
  String hash=br.getRegex("String_Node_Str").getMatch(0);
  if (hash == null)   throw new PluginException(LinkStatus.ERROR_PLUGIN_DEFECT);
  br.getPage("String_Node_Str" + fileID + "String_Node_Str"+ hash);
  Form recaptchaForm=new Form();
  recaptchaForm.setMethod(MethodType.POST);
  recaptchaForm.setAction("String_Node_Str");
  recaptchaForm.put("String_Node_Str",fileID);
  recaptchaForm.put("String_Node_Str",hash);
  boolean failed=true;
  for (int i=0; i <= 5; i++) {
    PluginForHost recplug=JDUtilities.getPluginForHost("String_Node_Str");
    jd.plugins.hoster.DirectHTTP.Recaptcha rc=((DirectHTTP)recplug).getReCaptcha(br);
    rc.setForm(recaptchaForm);
    rc.findID();
    rc.load();
    File cf=rc.downloadCaptcha(getLocalCaptchaFile());
    String c=getCaptchaCode(cf,downloadLink);
    rc.setCode(c);
    if (br.containsHTML("String_Node_Str")) {
      rc.reload();
      continue;
    }
    failed=false;
    break;
  }
  if (failed)   throw new PluginException(LinkStatus.ERROR_CAPTCHA);
  if (br.containsHTML("String_Node_Str"))   throw new PluginException(LinkStatus.ERROR_TEMPORARILY_UNAVAILABLE,"String_Node_Str",30 * 60 * 1000l);
  String dllink=br.getRegex("String_Node_Str").getMatch(0);
  if (dllink == null)   dllink=br.getRegex("String_Node_Str").getMatch(0);
  if (dllink == null)   throw new PluginException(LinkStatus.ERROR_PLUGIN_DEFECT);
  dl=jd.plugins.BrowserAdapter.openDownload(br,downloadLink,dllink,false,1);
  if (dl.getConnection().getContentType().contains("String_Node_Str")) {
    br.followConnection();
    throw new PluginException(LinkStatus.ERROR_PLUGIN_DEFECT);
  }
  dl.startDownload();
}

Fixed version (ground truth):
@Override public void handleFree(DownloadLink downloadLink) throws Exception, PluginException {
  requestFileInformation(downloadLink);
  int minutes=0, seconds=0;
  Regex limits=br.getRegex("String_Node_Str");
  String mins=limits.getMatch(0);
  String secs=limits.getMatch(1);
  if (secs == null)   secs=br.getRegex("String_Node_Str").getMatch(0);
  if (mins != null)   minutes=Integer.parseInt(mins);
  if (secs != null)   seconds=Integer.parseInt(secs);
  int waittime=((60 * minutes) + seconds + 1) * 1000;
  if (waittime > 1000)   throw new PluginException(LinkStatus.ERROR_IP_BLOCKED,waittime);
  br.setFollowRedirects(false);
  br.getHeaders().put("String_Node_Str","String_Node_Str");
  final String fileID=new Regex(downloadLink.getDownloadURL(),"String_Node_Str").getMatch(0);
  br.getPage("String_Node_Str" + fileID);
  String hash=br.getRegex("String_Node_Str").getMatch(0);
  if (hash == null)   throw new PluginException(LinkStatus.ERROR_PLUGIN_DEFECT);
  br.getPage("String_Node_Str" + fileID + "String_Node_Str"+ hash);
  Form recaptchaForm=new Form();
  recaptchaForm.setMethod(MethodType.POST);
  recaptchaForm.setAction("String_Node_Str");
  recaptchaForm.put("String_Node_Str",fileID);
  recaptchaForm.put("String_Node_Str",hash);
  boolean failed=true;
  for (int i=0; i <= 5; i++) {
    PluginForHost recplug=JDUtilities.getPluginForHost("String_Node_Str");
    jd.plugins.hoster.DirectHTTP.Recaptcha rc=((DirectHTTP)recplug).getReCaptcha(br);
    rc.setForm(recaptchaForm);
    String id=this.br.getRegex("String_Node_Str").getMatch(0);
    rc.setId(id);
    rc.load();
    File cf=rc.downloadCaptcha(getLocalCaptchaFile());
    String c=getCaptchaCode(cf,downloadLink);
    rc.setCode(c);
    if (br.containsHTML("String_Node_Str")) {
      rc.reload();
      continue;
    }
    failed=false;
    break;
  }
  if (failed)   throw new PluginException(LinkStatus.ERROR_CAPTCHA);
  if (br.containsHTML("String_Node_Str"))   throw new PluginException(LinkStatus.ERROR_TEMPORARILY_UNAVAILABLE,"String_Node_Str",30 * 60 * 1000l);
  String dllink=br.getRegex("String_Node_Str").getMatch(0);
  if (dllink == null)   dllink=br.getRegex("String_Node_Str").getMatch(0);
  if (dllink == null)   throw new PluginException(LinkStatus.ERROR_PLUGIN_DEFECT);
  dl=jd.plugins.BrowserAdapter.openDownload(br,downloadLink,dllink,false,1);
  if (dl.getConnection().getContentType().contains("String_Node_Str")) {
    br.followConnection();
    throw new PluginException(LinkStatus.ERROR_PLUGIN_DEFECT);
  }
  dl.startDownload();
}