Program: 21117
Project: 21117
Buggy source:
public void handleFree(DownloadLink downloadLink) throws Exception {
  requestFileInformation(downloadLink);
  br.setFollowRedirects(false);
  String dllink="String_Node_Str";
  if (br.containsHTML("String_Node_Str")) {
    if (!br.containsHTML("String_Node_Str"))     throw new PluginException(LinkStatus.ERROR_PLUGIN_DEFEKT);
    dllink=br.getRegex("String_Node_Str").getMatch(0);
  }
  Form form=br.getForm(0);
  if (form != null && form.hasInputFieldByName("String_Node_Str")) {
    form.setAction(downloadLink.getDownloadURL());
    form.remove("String_Node_Str");
    form.put("String_Node_Str",Encoding.urlEncode(downloadLink.getDownloadURL()));
    br.submitForm(form);
    if (br.containsHTML("String_Node_Str")) {
      int minutes=0, seconds=0, hours=0;
      String tmphrs=br.getRegex("String_Node_Str").getMatch(0);
      if (tmphrs != null)       hours=Integer.parseInt(tmphrs);
      String tmpmin=br.getRegex("String_Node_Str").getMatch(0);
      if (tmpmin != null)       minutes=Integer.parseInt(tmpmin);
      String tmpsec=br.getRegex("String_Node_Str").getMatch(0);
      if (tmpsec != null)       seconds=Integer.parseInt(tmpsec);
      int waittime=((3600 * hours) + (60 * minutes) + seconds+ 1) * 1000;
      throw new PluginException(LinkStatus.ERROR_IP_BLOCKED,null,waittime);
    }
 else {
      form=br.getFormbyProperty("String_Node_Str","String_Node_Str");
      if (form == null)       throw new PluginException(LinkStatus.ERROR_PLUGIN_DEFEKT);
      form.setAction(downloadLink.getDownloadURL());
      br.submitForm(form);
      URLConnectionAdapter con2=br.getHttpConnection();
      dllink=br.getRedirectLocation();
      if (con2.getContentType().contains("String_Node_Str")) {
        if (br.containsHTML("String_Node_Str"))         dllink=br.getRegex("String_Node_Str").getMatch(0);
      }
    }
  }
  if (dllink != null && dllink != "String_Node_Str") {
    dl=br.openDownload(downloadLink,dllink,true,-20);
    dl.startDownload();
  }
 else   throw new PluginException(LinkStatus.ERROR_PLUGIN_DEFEKT);
}

Fixed version (ground truth):
public void handleFree(DownloadLink downloadLink) throws Exception {
  requestFileInformation(downloadLink);
  br.setFollowRedirects(false);
  String dllink="String_Node_Str";
  if (br.containsHTML("String_Node_Str")) {
    if (!br.containsHTML("String_Node_Str"))     throw new PluginException(LinkStatus.ERROR_PLUGIN_DEFEKT);
    dllink=br.getRegex("String_Node_Str").getMatch(0);
  }
  Form form=br.getForm(0);
  if (form != null && form.hasInputFieldByName("String_Node_Str")) {
    form.setAction(downloadLink.getDownloadURL());
    form.remove("String_Node_Str");
    form.put("String_Node_Str",Encoding.urlEncode(downloadLink.getDownloadURL()));
    br.submitForm(form);
    if (br.containsHTML("String_Node_Str")) {
      int minutes=0, seconds=0, hours=0;
      String tmphrs=br.getRegex("String_Node_Str").getMatch(0);
      if (tmphrs != null)       hours=Integer.parseInt(tmphrs);
      String tmpmin=br.getRegex("String_Node_Str").getMatch(0);
      if (tmpmin != null)       minutes=Integer.parseInt(tmpmin);
      String tmpsec=br.getRegex("String_Node_Str").getMatch(0);
      if (tmpsec != null)       seconds=Integer.parseInt(tmpsec);
      int waittime=((3600 * hours) + (60 * minutes) + seconds+ 1) * 1000;
      throw new PluginException(LinkStatus.ERROR_IP_BLOCKED,null,waittime);
    }
 else {
      form=br.getFormbyProperty("String_Node_Str","String_Node_Str");
      if (form == null)       throw new PluginException(LinkStatus.ERROR_PLUGIN_DEFEKT);
      form.setAction(downloadLink.getDownloadURL());
      br.submitForm(form);
      URLConnectionAdapter con2=br.getHttpConnection();
      dllink=br.getRedirectLocation();
      if (con2.getContentType().contains("String_Node_Str")) {
        if (br.containsHTML("String_Node_Str"))         dllink=br.getRegex("String_Node_Str").getMatch(0);
      }
    }
  }
  if (dllink != null && dllink != "String_Node_Str") {
    dl=br.openDownload(downloadLink,dllink,true,-20);
    dl.setResume(true);
    dl.startDownload();
  }
 else   throw new PluginException(LinkStatus.ERROR_PLUGIN_DEFEKT);
}