Program: 128698
Project: 128698
Buggy source:
private void downLoad(final IProgressMonitor monitor){
  final List<URL> downloadOk=new ArrayList<URL>();
  for (  final ModuleToInstall module : toDownload) {
    if (!monitor.isCanceled()) {
      monitor.subTask("String_Node_Str" + module.getName() + "String_Node_Str"+ module.getUrl_description());
      monitor.worked(5);
      DownloadHelper downloader=new DownloadHelper();
      String librariesPath=PreferencesUtilities.getLibrariesPath(ECodeLanguage.JAVA);
      File target=new File(librariesPath);
      if (module.getUrl_download() != null && !"String_Node_Str".equals(module.getUrl_download())) {
        try {
          boolean isLicenseAccepted=Activator.getDefault().getPreferenceStore().getBoolean(module.getLicenseType());
          if (!isLicenseAccepted) {
            Display.getDefault().syncExec(new Runnable(){
              @Override public void run(){
                String license=RemoteModulesHelper.getInstance().getLicenseUrl(module.getLicenseType());
                ModuleLicenseDialog licenseDialog=new ModuleLicenseDialog(getShell(),module.getLicenseType(),license,module.getDescription());
                if (licenseDialog.open() != Window.OK) {
                  downloadFialed.add(module.getName());
                  accepted=false;
                }
 else {
                  accepted=true;
                }
              }
            }
);
          }
 else {
            accepted=true;
          }
          if (!accepted) {
            monitor.worked(5);
            continue;
          }
          File destination=new File(target.toString() + File.separator + module.getName());
          downloader.download(new URL(module.getUrl_download()),destination);
          downloadOk.add(destination.toURL());
          installedModules.add(module.getName());
          monitor.worked(2);
        }
 catch (        Exception e) {
          downloadFialed.add(module.getName());
          ExceptionHandler.process(e);
          continue;
        }
      }
      accepted=false;
    }
 else {
      downloadFialed.add(module.getName());
    }
  }
  if (!downloadOk.isEmpty()) {
    Display.getDefault().syncExec(new Runnable(){
      @Override public void run(){
        try {
          CorePlugin.getDefault().getLibrariesService().deployLibrarys(downloadOk.toArray(new URL[downloadOk.size()]));
        }
 catch (        IOException e) {
          ExceptionHandler.process(e);
        }
        monitor.worked(5);
      }
    }
);
  }
}

Fixed version (ground truth):
private void downLoad(final IProgressMonitor monitor){
  final List<URL> downloadOk=new ArrayList<URL>();
  for (  final ModuleToInstall module : toDownload) {
    if (!monitor.isCanceled()) {
      monitor.subTask(module.getName());
      monitor.worked(5);
      DownloadHelper downloader=new DownloadHelper();
      String librariesPath=PreferencesUtilities.getLibrariesPath(ECodeLanguage.JAVA);
      File target=new File(librariesPath);
      if (module.getUrl_download() != null && !"String_Node_Str".equals(module.getUrl_download())) {
        try {
          boolean isLicenseAccepted=Activator.getDefault().getPreferenceStore().getBoolean(module.getLicenseType());
          if (!isLicenseAccepted) {
            Display.getDefault().syncExec(new Runnable(){
              @Override public void run(){
                String license=RemoteModulesHelper.getInstance().getLicenseUrl(module.getLicenseType());
                ModuleLicenseDialog licenseDialog=new ModuleLicenseDialog(getShell(),module.getLicenseType(),license,module.getDescription());
                if (licenseDialog.open() != Window.OK) {
                  downloadFialed.add(module.getName());
                  accepted=false;
                }
 else {
                  accepted=true;
                }
              }
            }
);
          }
 else {
            accepted=true;
          }
          if (!accepted) {
            monitor.worked(5);
            continue;
          }
          File destination=new File(target.toString() + File.separator + module.getName());
          downloader.download(new URL(module.getUrl_download()),destination);
          downloadOk.add(destination.toURL());
          installedModules.add(module.getName());
          monitor.worked(2);
        }
 catch (        Exception e) {
          downloadFialed.add(module.getName());
          ExceptionHandler.process(e);
          continue;
        }
      }
      accepted=false;
    }
 else {
      downloadFialed.add(module.getName());
    }
  }
  if (!downloadOk.isEmpty()) {
    Display.getDefault().syncExec(new Runnable(){
      @Override public void run(){
        try {
          CorePlugin.getDefault().getLibrariesService().deployLibrarys(downloadOk.toArray(new URL[downloadOk.size()]));
        }
 catch (        IOException e) {
          ExceptionHandler.process(e);
        }
        monitor.worked(5);
      }
    }
);
  }
}