Program: 161927
Project: 161927
Buggy source:
private void configureSkyboxes(final JComboBox<String> combo){
  Vector<String> data=new Vector<>();
  Path dir=Paths.get("String_Node_Str");
  if (Files.exists(dir)) {
    log.finer("String_Node_Str");
    try (DirectoryStream<Path> stream=Files.newDirectoryStream(dir,"String_Node_Str")){
      for (      Path path : stream) {
        log.finer("String_Node_Str" + path);
        String skybox=path.toFile().getName();
        skybox=skybox.substring(0,skybox.indexOf("String_Node_Str"));
        data.add(skybox);
      }
    }
 catch (    IOException e) {
      log.log(Level.INFO,"String_Node_Str",e);
    }
  }
  Path vpk=Paths.get("String_Node_Str");
  if (Files.exists(vpk)) {
    log.finer("String_Node_Str" + vpk);
    for (    String file : cl.getVpkContents(settings.getTfPath(),vpk)) {
      if (file.endsWith("String_Node_Str")) {
        log.finer("String_Node_Str" + file);
        String skybox=file;
        skybox=skybox.substring(0,skybox.indexOf("String_Node_Str"));
        if (!data.contains(skybox)) {
          data.add(skybox);
        }
 else {
          log.finer("String_Node_Str" + skybox);
        }
      }
    }
  }
  skyboxMap=new HashMap<>(data.size());
  getSkyboxLoader(new ArrayList<>(data)).execute();
  data.add(0,(String)Key.Skybox.defValue());
  combo.setModel(new DefaultComboBoxModel<String>(data));
  combo.addActionListener(new ActionListener(){
    @Override public void actionPerformed(    ActionEvent e){
      ImageIcon preview=skyboxMap.get(combo.getSelectedItem());
      view.getLblPreview().setText(preview == null ? "String_Node_Str" : "String_Node_Str");
      view.getLblSkyboxPreview().setIcon(preview);
    }
  }
);
}

Fixed version (ground truth):
private void configureSkyboxes(final JComboBox<String> combo){
  final Vector<String> data=new Vector<>();
  Path dir=Paths.get("String_Node_Str");
  if (Files.exists(dir)) {
    log.finer("String_Node_Str");
    try (DirectoryStream<Path> stream=Files.newDirectoryStream(dir,"String_Node_Str")){
      for (      Path path : stream) {
        log.finer("String_Node_Str" + path);
        String skybox=path.toFile().getName();
        skybox=skybox.substring(0,skybox.indexOf("String_Node_Str"));
        data.add(skybox);
      }
    }
 catch (    IOException e) {
      log.log(Level.INFO,"String_Node_Str",e);
    }
  }
  Path vpk=Paths.get("String_Node_Str");
  if (Files.exists(vpk)) {
    log.finer("String_Node_Str" + vpk);
    for (    String file : cl.getVpkContents(settings.getTfPath(),vpk)) {
      if (file.endsWith("String_Node_Str")) {
        log.finer("String_Node_Str" + file);
        String skybox=file;
        skybox=skybox.substring(0,skybox.indexOf("String_Node_Str"));
        if (!data.contains(skybox)) {
          data.add(skybox);
        }
 else {
          log.finer("String_Node_Str" + skybox);
        }
      }
    }
  }
  skyboxMap=new HashMap<>(data.size());
  new SkyboxPreviewTask(new ArrayList<>(data)).execute();
  data.add(0,(String)Key.Skybox.defValue());
  combo.setModel(new DefaultComboBoxModel<String>(data));
  combo.addActionListener(new ActionListener(){
    @Override public void actionPerformed(    ActionEvent e){
      ImageIcon preview=skyboxMap.get(combo.getSelectedItem());
      view.getLblPreview().setText(preview == null ? "String_Node_Str" : "String_Node_Str");
      view.getLblSkyboxPreview().setIcon(preview);
    }
  }
);
}