Program: 21288
Project: 21288
Buggy source:
@SuppressWarnings("String_Node_Str") public synchronized void onDownloadedPackage(final DownloadLink downloadLink){
  final PackageData dat=(PackageData)downloadLink.getProperty("String_Node_Str");
  logger.finer("String_Node_Str");
  if (dat == null) {
    logger.severe("String_Node_Str");
    return;
  }
  dat.setProperty("String_Node_Str",downloadLink.getFileOutput());
  dat.setDownloaded(true);
  ArrayList<PackageData> data=(ArrayList<PackageData>)CFGConfig.getConfig("String_Node_Str").getProperty("String_Node_Str",new ArrayList<PackageData>());
  for (  PackageData pd : data) {
    if (pd.isDownloaded())     logger.finer(pd.getStringProperty("String_Node_Str") + "String_Node_Str" + pd.getStringProperty("String_Node_Str"));
    if (pd == dat)     logger.finer("String_Node_Str");
  }
  CFGConfig.getConfig("String_Node_Str").save();
  new Thread(){
    @Override public void run(){
      try {
        Thread.sleep(1000);
      }
 catch (      InterruptedException e) {
        e.printStackTrace();
      }
      JDUtilities.getController().removeDownloadLink(downloadLink);
      JDUtilities.getController().fireControlEvent(new ControlEvent(this,ControlEvent.CONTROL_LINKLIST_STRUCTURE_CHANGED,null));
      boolean ch=false;
      all:       for (      FilePackage fp : JDUtilities.getController().getPackages()) {
        for (        DownloadLink dLink : fp.getDownloadLinks()) {
          if (dLink.getLinkType() == DownloadLink.LINKTYPE_JDU) {
            ch=true;
            break all;
          }
        }
      }
      if (!ch) {
        String list="String_Node_Str";
        for (        PackageData pa : getDownloadedPackages()) {
          list+=pa.getStringProperty("String_Node_Str") + "String_Node_Str" + pa.getStringProperty("String_Node_Str")+ "String_Node_Str";
        }
        String message=JDLocale.LF("String_Node_Str","String_Node_Str",list);
        boolean ret=JDUtilities.getGUI().showCountdownConfirmDialog(message,15);
        if (ret) {
          new JDInit().doWebupdate(JDUtilities.getConfiguration().getIntegerProperty(Configuration.CID,-1),true);
        }
      }
    }
  }
.start();
}

Fixed version (ground truth):
@SuppressWarnings("String_Node_Str") public synchronized void onDownloadedPackage(final DownloadLink downloadLink){
  PackageData d=(PackageData)downloadLink.getProperty("String_Node_Str");
  final PackageData dat;
  logger.finer("String_Node_Str");
  ArrayList<PackageData> data=this.getPackageData();
  boolean found=false;
  for (  PackageData pd : data) {
    if (pd.equals(d)) {
      logger.finer("String_Node_Str");
{
        dat=pd;
        found=true;
        dat.setProperty("String_Node_Str",downloadLink.getFileOutput());
        dat.setDownloaded(true);
        CFGConfig.getConfig("String_Node_Str").save();
        new Thread(){
          @Override public void run(){
            try {
              Thread.sleep(1000);
            }
 catch (            InterruptedException e) {
              e.printStackTrace();
            }
            JDUtilities.getController().removeDownloadLink(downloadLink);
            JDUtilities.getController().fireControlEvent(new ControlEvent(this,ControlEvent.CONTROL_LINKLIST_STRUCTURE_CHANGED,null));
            boolean ch=false;
            all:             for (            FilePackage fp : JDUtilities.getController().getPackages()) {
              for (              DownloadLink dLink : fp.getDownloadLinks()) {
                if (dLink.getLinkType() == DownloadLink.LINKTYPE_JDU) {
                  ch=true;
                  break all;
                }
              }
            }
            if (!ch) {
              String list="String_Node_Str";
              for (              PackageData pa : getDownloadedPackages()) {
                list+=pa.getStringProperty("String_Node_Str") + "String_Node_Str" + pa.getStringProperty("String_Node_Str")+ "String_Node_Str";
              }
              String message=JDLocale.LF("String_Node_Str","String_Node_Str",list);
              boolean ret=JDUtilities.getGUI().showCountdownConfirmDialog(message,15);
              if (ret) {
                new JDInit().doWebupdate(JDUtilities.getConfiguration().getIntegerProperty(Configuration.CID,-1),true);
              }
            }
          }
        }
.start();
        break;
      }
    }
  }
  if (!found) {
    logger.severe("String_Node_Str" + d + "String_Node_Str");
  }
}