Program: 32886
Project: 32886
Buggy source:
public DrawablePickerDialog(final SkinEditorGame game,final Field field){
  super("String_Node_Str",game.skin);
  this.game=game;
  this.field=field;
  tableDrawables=new Table(game.skin);
  scrollPane=new ScrollPane(tableDrawables,game.skin);
  getContentTable().add(scrollPane);
  scrollPane.setFlickScroll(false);
  scrollPane.setFadeScrollBars(false);
  scrollPane.setScrollbarsOnTop(true);
  TextButton buttonZoom=new TextButton("String_Node_Str",game.skin);
  buttonZoom.addListener(new ChangeListener(){
    @Override public void changed(    ChangeEvent event,    Actor actor){
      zoom=!zoom;
      updateTable();
    }
  }
);
  TextButton buttonNewDrawable=new TextButton("String_Node_Str",game.skin);
  buttonNewDrawable.addListener(new ChangeListener(){
    @Override public void changed(    ChangeEvent event,    Actor actor){
      JFileChooser chooser=new JFileChooser();
      FileNameExtensionFilter filter=new FileNameExtensionFilter("String_Node_Str","String_Node_Str");
      chooser.setFileFilter(filter);
      int returnVal=chooser.showOpenDialog(null);
      if (returnVal != JFileChooser.APPROVE_OPTION) {
        return;
      }
      File selectedFile=chooser.getSelectedFile();
      if (selectedFile == null) {
        return;
      }
      while (true) {
        String resourceName=selectedFile.getName();
        String ext=resourceName.substring(resourceName.lastIndexOf("String_Node_Str") + 1);
        resourceName=resourceName.substring(0,resourceName.lastIndexOf("String_Node_Str"));
        resourceName=JOptionPane.showInputDialog("String_Node_Str",resourceName);
        if (resourceName == null) {
          return;
        }
        resourceName=resourceName.toLowerCase();
        FileHandle[] assetsFolder=new FileHandle("String_Node_Str" + game.screenMain.getcurrentProject() + "String_Node_Str").list();
        boolean foundSomething=false;
        for (        FileHandle file : assetsFolder) {
          if (file.nameWithoutExtension().toLowerCase().equals(resourceName)) {
            foundSomething=true;
            break;
          }
        }
        if (foundSomething == true) {
          JOptionPane.showMessageDialog(null,"String_Node_Str");
        }
 else {
          FileHandle orig=new FileHandle(selectedFile);
          FileHandle dest=new FileHandle("String_Node_Str" + game.screenMain.getcurrentProject() + "String_Node_Str"+ resourceName+ "String_Node_Str"+ ext);
          orig.copyTo(dest);
          game.screenMain.refreshResources();
          refresh();
          JOptionPane.showMessageDialog(null,"String_Node_Str");
          return;
        }
      }
    }
  }
);
  TextButton buttonNoDrawable=new TextButton("String_Node_Str",game.skin);
  buttonNoDrawable.addListener(new ChangeListener(){
    @Override public void changed(    ChangeEvent event,    Actor actor){
      try {
        field.set(game.screenMain.paneOptions.currentStyle,null);
      }
 catch (      Exception e) {
        e.printStackTrace();
      }
      game.screenMain.saveToSkin();
      hide();
      game.screenMain.panePreview.refresh();
      game.screenMain.paneOptions.updateSelectedTableFields();
    }
  }
);
  getContentTable().add(scrollPane).width(960).height(640).pad(20);
  getButtonTable().add(buttonZoom);
  getButtonTable().add(buttonNewDrawable);
  getButtonTable().add(buttonNoDrawable);
  getButtonTable().padBottom(15);
  button("String_Node_Str",false);
  key(com.badlogic.gdx.Input.Keys.ESCAPE,false);
}

Fixed version (ground truth):
public DrawablePickerDialog(final SkinEditorGame game,final Field field){
  super("String_Node_Str",game.skin);
  this.game=game;
  this.field=field;
  tableDrawables=new Table(game.skin);
  scrollPane=new ScrollPane(tableDrawables,game.skin);
  getContentTable().add(scrollPane);
  scrollPane.setFlickScroll(false);
  scrollPane.setFadeScrollBars(false);
  scrollPane.setScrollbarsOnTop(true);
  TextButton buttonZoom=new TextButton("String_Node_Str",game.skin);
  buttonZoom.addListener(new ChangeListener(){
    @Override public void changed(    ChangeEvent event,    Actor actor){
      zoom=!zoom;
      updateTable();
    }
  }
);
  TextButton buttonNewDrawable=new TextButton("String_Node_Str",game.skin);
  buttonNewDrawable.addListener(new ChangeListener(){
    @Override public void changed(    ChangeEvent event,    Actor actor){
      Frame frame=new Frame();
      frame.setUndecorated(true);
      frame.setOpacity(0);
      frame.setLocationRelativeTo(null);
      frame.setVisible(true);
      frame.toFront();
      frame.setVisible(false);
      frame.dispose();
      JFileChooser chooser=new JFileChooser();
      FileNameExtensionFilter filter=new FileNameExtensionFilter("String_Node_Str","String_Node_Str");
      chooser.setFileFilter(filter);
      int returnVal=chooser.showOpenDialog(null);
      if (returnVal != JFileChooser.APPROVE_OPTION) {
        return;
      }
      File selectedFile=chooser.getSelectedFile();
      if (selectedFile == null) {
        return;
      }
      while (true) {
        String resourceName=selectedFile.getName();
        String ext=resourceName.substring(resourceName.lastIndexOf("String_Node_Str") + 1);
        resourceName=resourceName.substring(0,resourceName.lastIndexOf("String_Node_Str"));
        resourceName=JOptionPane.showInputDialog("String_Node_Str",resourceName);
        if (resourceName == null) {
          return;
        }
        resourceName=resourceName.toLowerCase();
        FileHandle[] assetsFolder=new FileHandle("String_Node_Str" + game.screenMain.getcurrentProject() + "String_Node_Str").list();
        boolean foundSomething=false;
        for (        FileHandle file : assetsFolder) {
          if (file.nameWithoutExtension().toLowerCase().equals(resourceName)) {
            foundSomething=true;
            break;
          }
        }
        if (foundSomething == true) {
          JOptionPane.showMessageDialog(null,"String_Node_Str");
        }
 else {
          FileHandle orig=new FileHandle(selectedFile);
          FileHandle dest=new FileHandle("String_Node_Str" + game.screenMain.getcurrentProject() + "String_Node_Str"+ resourceName+ "String_Node_Str"+ ext);
          orig.copyTo(dest);
          game.screenMain.refreshResources();
          refresh();
          JOptionPane.showMessageDialog(null,"String_Node_Str");
          return;
        }
      }
    }
  }
);
  TextButton buttonNoDrawable=new TextButton("String_Node_Str",game.skin);
  buttonNoDrawable.addListener(new ChangeListener(){
    @Override public void changed(    ChangeEvent event,    Actor actor){
      try {
        field.set(game.screenMain.paneOptions.currentStyle,null);
      }
 catch (      Exception e) {
        e.printStackTrace();
      }
      game.screenMain.saveToSkin();
      hide();
      game.screenMain.panePreview.refresh();
      game.screenMain.paneOptions.updateSelectedTableFields();
    }
  }
);
  getContentTable().add(scrollPane).width(960).height(640).pad(20);
  getButtonTable().add(buttonZoom);
  getButtonTable().add(buttonNewDrawable);
  getButtonTable().add(buttonNoDrawable);
  getButtonTable().padBottom(15);
  button("String_Node_Str",false);
  key(com.badlogic.gdx.Input.Keys.ESCAPE,false);
}