Program: 21220
Project: 21220
Buggy source:
@Override public ArrayList<DownloadLink> decryptIt(CryptedLink param) throws Exception {
  ArrayList<DownloadLink> decryptedLinks=new ArrayList<DownloadLink>();
  String parameter=param.toString();
  for (int retry=1; retry <= 10; retry++) {
    try {
      br.setReadTimeout(5 * 60 * 1000);
      br.setConnectTimeout(5 * 60 * 1000);
      br.getPage(parameter);
      String pass=br.getRegex(Pattern.compile("String_Node_Str",Pattern.CASE_INSENSITIVE | Pattern.DOTALL)).getMatch(0);
      Vector<String> passwords=new Vector<String>();
      passwords.add("String_Node_Str");
      if (pass != null && !pass.equals("String_Node_Str")) {
        passwords.add(pass);
      }
      Form[] forms=br.getForms();
      progress.setRange(forms.length);
      DDLWarez_Linkgrabber DDLWarez_Linkgrabbers[]=new DDLWarez_Linkgrabber[forms.length];
      for (int i=0; i < forms.length; ++i) {
synchronized (Worker_Delay) {
          Thread.sleep(Worker_Delay);
        }
        DDLWarez_Linkgrabbers[i]=new DDLWarez_Linkgrabber(i,br.cloneBrowser());
        DDLWarez_Linkgrabbers[i].setjob(forms[i]);
        DDLWarez_Linkgrabbers[i].start();
      }
      for (int i=0; i < forms.length; ++i) {
        try {
          DDLWarez_Linkgrabbers[i].join();
          if (DDLWarez_Linkgrabbers[i].status() == DDLWarez_Linkgrabber.THREADPASS) {
            DownloadLink link=createDownloadlink(DDLWarez_Linkgrabbers[i].getlink());
            link.setSourcePluginPasswords(passwords);
            decryptedLinks.add(link);
          }
          progress.increase(1);
        }
 catch (        InterruptedException e) {
          e.printStackTrace();
        }
      }
      return decryptedLinks;
    }
 catch (    Exception e) {
      logger.finest("String_Node_Str");
    }
  }
  return null;
}

Fixed version (ground truth):
@Override public ArrayList<DownloadLink> decryptIt(CryptedLink param) throws Exception {
  ArrayList<DownloadLink> decryptedLinks=new ArrayList<DownloadLink>();
  String parameter=param.toString();
  for (int retry=1; retry <= 10; retry++) {
    try {
      br.setReadTimeout(5 * 60 * 1000);
      br.setConnectTimeout(5 * 60 * 1000);
      br.getPage(parameter);
      String pass=br.getRegex(Pattern.compile("String_Node_Str",Pattern.CASE_INSENSITIVE | Pattern.DOTALL)).getMatch(0);
      Vector<String> passwords=new Vector<String>();
      passwords.add("String_Node_Str");
      if (pass != null && !pass.equals("String_Node_Str")) {
        passwords.add(pass);
      }
      Form[] forms=br.getForms();
      progress.setRange(forms.length);
      DDLWarez_Linkgrabber DDLWarez_Linkgrabbers[]=new DDLWarez_Linkgrabber[forms.length];
      for (int i=0; i < forms.length; ++i) {
synchronized (Worker_Delay) {
          Thread.sleep(Worker_Delay);
        }
        DDLWarez_Linkgrabbers[i]=new DDLWarez_Linkgrabber(progress,i,br.cloneBrowser());
        DDLWarez_Linkgrabbers[i].setjob(forms[i]);
        DDLWarez_Linkgrabbers[i].start();
      }
      for (int i=0; i < forms.length; ++i) {
        try {
          DDLWarez_Linkgrabbers[i].join();
          if (DDLWarez_Linkgrabbers[i].status() == DDLWarez_Linkgrabber.THREADPASS) {
            DownloadLink link=createDownloadlink(DDLWarez_Linkgrabbers[i].getlink());
            link.setSourcePluginPasswords(passwords);
            decryptedLinks.add(link);
          }
        }
 catch (        InterruptedException e) {
          e.printStackTrace();
        }
      }
      return decryptedLinks;
    }
 catch (    Exception e) {
      logger.finest("String_Node_Str");
    }
  }
  return null;
}