Program: 20694
Project: 20694
Buggy source:
@Override public void handleFree(DownloadLink downloadLink) throws Exception {
  requestFileInformation(downloadLink);
  this.setBrowserExclusive();
  workAroundTimeOut(br);
  String id=getID(downloadLink);
  br.setFollowRedirects(false);
  br.setCookie("String_Node_Str","String_Node_Str","String_Node_Str");
  br.getPage("String_Node_Str");
  br.getPage("String_Node_Str" + id);
  if (br.getRedirectLocation() != null && br.getRedirectLocation().contains("String_Node_Str")) {
    throw new PluginException(LinkStatus.ERROR_FILE_NOT_FOUND);
  }
  if (br.getRedirectLocation() != null)   br.getPage(br.getRedirectLocation());
  String passCode=null;
  if (br.containsHTML("String_Node_Str")) {
    passCode=getPassword(downloadLink);
    Form form=br.getForm(0);
    form.put("String_Node_Str",Encoding.urlEncode(passCode));
    br.submitForm(form);
    if (br.containsHTML("String_Node_Str")) {
      downloadLink.setProperty("String_Node_Str",null);
      throw new PluginException(LinkStatus.ERROR_RETRY,"String_Node_Str");
    }
    downloadLink.setProperty("String_Node_Str",passCode);
  }
  Browser brc=br.cloneBrowser();
  brc.getPage("String_Node_Str");
  String recaptcha=brc.getRegex("String_Node_Str").getMatch(0);
  if (recaptcha == null) {
    logger.severe(brc.toString());
    throw new PluginException(LinkStatus.ERROR_PLUGIN_DEFECT);
  }
  PluginForHost recplug=JDUtilities.getPluginForHost("String_Node_Str");
  jd.plugins.hoster.DirectHTTP.Recaptcha rc=((DirectHTTP)recplug).getReCaptcha(br);
  rc.setId(recaptcha.trim());
  rc.load();
  Form rcForm=new Form();
  rcForm.setMethod(MethodType.POST);
  rcForm.setAction("String_Node_Str" + getID(downloadLink));
  File cf=rc.downloadCaptcha(getLocalCaptchaFile());
  rc.setForm(rcForm);
  String wait=br.getRegex("String_Node_Str").getMatch(0);
  String c=getCaptchaCode(cf,downloadLink);
  rc.setCode(c);
  if (br.containsHTML("String_Node_Str"))   throw new PluginException(LinkStatus.ERROR_CAPTCHA);
  if (br.containsHTML("String_Node_Str"))   throw new PluginException(LinkStatus.ERROR_IP_BLOCKED,60 * 60 * 1000l);
  if (br.containsHTML("String_Node_Str"))   throw new PluginException(LinkStatus.ERROR_IP_BLOCKED,"String_Node_Str",60 * 60 * 1000l);
  if (br.containsHTML("String_Node_Str"))   throw new PluginException(LinkStatus.ERROR_FATAL,"String_Node_Str");
  if (wait != null) {
    this.sleep(Integer.parseInt(wait) * 1000l,downloadLink);
  }
  String url=br.getRegex("String_Node_Str").getMatch(0);
  if (url == null)   throw new PluginException(LinkStatus.ERROR_PLUGIN_DEFECT);
  dl=BrowserAdapter.openDownload(br,downloadLink,url,false,1);
  try {
    dl.getRequest().setConnectTimeout(30000);
    dl.getRequest().setReadTimeout(60000);
  }
 catch (  final Throwable ee) {
  }
  if (!dl.getConnection().isContentDisposition()) {
    br.followConnection();
    if (br.containsHTML("String_Node_Str"))     throw new PluginException(LinkStatus.ERROR_TEMPORARILY_UNAVAILABLE,"String_Node_Str",10 * 60 * 1000l);
    if (br.getURL().contains("String_Node_Str"))     throw new PluginException(LinkStatus.ERROR_TEMPORARILY_UNAVAILABLE,"String_Node_Str",10 * 60 * 1000l);
    throw new PluginException(LinkStatus.ERROR_PLUGIN_DEFECT);
  }
  dl.startDownload();
}

Fixed version (ground truth):
@Override public void handleFree(DownloadLink downloadLink) throws Exception {
  requestFileInformation(downloadLink);
  this.setBrowserExclusive();
  workAroundTimeOut(br);
  String id=getID(downloadLink);
  br.setFollowRedirects(false);
  br.setCookie("String_Node_Str","String_Node_Str","String_Node_Str");
  br.getPage("String_Node_Str");
  br.getPage("String_Node_Str" + id);
  if (br.getRedirectLocation() != null && br.getRedirectLocation().contains("String_Node_Str")) {
    throw new PluginException(LinkStatus.ERROR_FILE_NOT_FOUND);
  }
  if (br.getRedirectLocation() != null)   br.getPage(br.getRedirectLocation());
  String passCode=null;
  if (br.containsHTML("String_Node_Str")) {
    passCode=getPassword(downloadLink);
    Form form=br.getForm(0);
    form.put("String_Node_Str",Encoding.urlEncode(passCode));
    br.submitForm(form);
    if (br.containsHTML("String_Node_Str")) {
      downloadLink.setProperty("String_Node_Str",null);
      throw new PluginException(LinkStatus.ERROR_RETRY,"String_Node_Str");
    }
    downloadLink.setProperty("String_Node_Str",passCode);
  }
  Browser brc=br.cloneBrowser();
  brc.getPage("String_Node_Str");
  String recaptcha=brc.getRegex("String_Node_Str").getMatch(0);
  if (recaptcha == null) {
    logger.severe(brc.toString());
    throw new PluginException(LinkStatus.ERROR_PLUGIN_DEFECT);
  }
  PluginForHost recplug=JDUtilities.getPluginForHost("String_Node_Str");
  jd.plugins.hoster.DirectHTTP.Recaptcha rc=((DirectHTTP)recplug).getReCaptcha(br);
  rc.setId(recaptcha.trim());
  rc.load();
  Form rcForm=new Form();
  rcForm.setMethod(MethodType.POST);
  rcForm.setAction("String_Node_Str" + getID(downloadLink));
  File cf=rc.downloadCaptcha(getLocalCaptchaFile());
  rc.setForm(rcForm);
  String wait=br.getRegex("String_Node_Str").getMatch(0);
  String c=getCaptchaCode(cf,downloadLink);
  rc.setCode(c);
  if (br.containsHTML("String_Node_Str"))   throw new PluginException(LinkStatus.ERROR_TEMPORARILY_UNAVAILABLE,"String_Node_Str",30 * 60 * 1000l);
  if (br.containsHTML("String_Node_Str"))   throw new PluginException(LinkStatus.ERROR_CAPTCHA);
  if (br.containsHTML("String_Node_Str"))   throw new PluginException(LinkStatus.ERROR_IP_BLOCKED,60 * 60 * 1000l);
  if (br.containsHTML("String_Node_Str"))   throw new PluginException(LinkStatus.ERROR_IP_BLOCKED,"String_Node_Str",60 * 60 * 1000l);
  if (br.containsHTML("String_Node_Str"))   throw new PluginException(LinkStatus.ERROR_FATAL,"String_Node_Str");
  if (wait != null) {
    this.sleep(Integer.parseInt(wait) * 1000l,downloadLink);
  }
  String url=br.getRegex("String_Node_Str").getMatch(0);
  if (url == null)   throw new PluginException(LinkStatus.ERROR_PLUGIN_DEFECT);
  dl=BrowserAdapter.openDownload(br,downloadLink,url,false,1);
  try {
    dl.getRequest().setConnectTimeout(30000);
    dl.getRequest().setReadTimeout(60000);
  }
 catch (  final Throwable ee) {
  }
  if (!dl.getConnection().isContentDisposition()) {
    br.followConnection();
    if (br.containsHTML("String_Node_Str"))     throw new PluginException(LinkStatus.ERROR_TEMPORARILY_UNAVAILABLE,"String_Node_Str",10 * 60 * 1000l);
    if (br.getURL().contains("String_Node_Str"))     throw new PluginException(LinkStatus.ERROR_TEMPORARILY_UNAVAILABLE,"String_Node_Str",10 * 60 * 1000l);
    throw new PluginException(LinkStatus.ERROR_PLUGIN_DEFECT);
  }
  dl.startDownload();
}