Program: 51991
Project: 51991
Buggy source:
@Override public void layout(){
  if (type == Type.CHECKBOX || type == Type.RADIO) {
    AbstractButton oldButton=button;
    button=new JToggleButton();
    button.setText(oldButton.getText());
    button.setIcon(oldButton.getIcon());
    button.setEnabled(oldButton.isEnabled());
    button.setSelected(this.selected);
    if (this.getOnclick() != null) {
      this.setOnclick(this.getOnclick());
    }
    managedObject=button;
    if (this.group != null) {
      button.addComponentListener(new ComponentListener(){
        public void componentHidden(        ComponentEvent arg0){
        }
        public void componentMoved(        ComponentEvent arg0){
        }
        public void componentShown(        ComponentEvent arg0){
        }
        public void componentResized(        ComponentEvent arg0){
          buttonGroup=((SwingWindow)SwingButton.this.getDocument().getRootElement()).getButtonGroup(group);
          buttonGroup.add(button);
          if (buttonGroup.getButtonCount() == 1) {
            button.setSelected(true);
          }
          button.removeComponentListener(this);
        }
      }
);
    }
  }
  if (this.orientation == Orient.VERTICAL) {
    this.button.setHorizontalTextPosition(JButton.CENTER);
    if (this.dir == Direction.FORWARD) {
      this.button.setVerticalTextPosition(JButton.BOTTOM);
    }
 else {
      this.button.setVerticalTextPosition(JButton.TOP);
    }
  }
 else {
    this.button.setVerticalTextPosition(JButton.CENTER);
    if (this.dir == Direction.FORWARD) {
      this.button.setHorizontalTextPosition(JButton.RIGHT);
    }
 else {
      this.button.setHorizontalTextPosition(JButton.LEFT);
    }
  }
  if (button.getText().equals("String_Node_Str") && button.getIcon().getIconHeight() == button.getIcon().getIconWidth()) {
    Dimension dim=button.getPreferredSize();
    button.setMinimumSize(new Dimension(dim.height,dim.height));
    button.setPreferredSize(new Dimension(dim.height,dim.height));
  }
  super.layout();
}

Fixed version (ground truth):
@Override public void layout(){
  if (type == Type.CHECKBOX || type == Type.RADIO) {
    AbstractButton oldButton=button;
    button=new JToggleButton();
    button.setText(oldButton.getText());
    button.setIcon(oldButton.getIcon());
    button.setEnabled(oldButton.isEnabled());
    button.setSelected(this.selected);
    if (this.getOnclick() != null) {
      this.setOnclick(this.getOnclick());
    }
    managedObject=button;
    if (this.group != null) {
      button.addComponentListener(new ComponentListener(){
        public void componentHidden(        ComponentEvent arg0){
        }
        public void componentMoved(        ComponentEvent arg0){
        }
        public void componentShown(        ComponentEvent arg0){
        }
        public void componentResized(        ComponentEvent arg0){
          buttonGroup=((SwingWindow)SwingButton.this.getDocument().getRootElement()).getButtonGroup(group);
          buttonGroup.add(button);
          if (buttonGroup.getButtonCount() == 1) {
            button.setSelected(true);
          }
          button.removeComponentListener(this);
        }
      }
);
    }
  }
  if (this.orientation == Orient.VERTICAL) {
    this.button.setHorizontalTextPosition(JButton.CENTER);
    if (this.dir == Direction.FORWARD) {
      this.button.setVerticalTextPosition(JButton.BOTTOM);
    }
 else {
      this.button.setVerticalTextPosition(JButton.TOP);
    }
  }
 else {
    this.button.setVerticalTextPosition(JButton.CENTER);
    if (this.dir == Direction.FORWARD) {
      this.button.setHorizontalTextPosition(JButton.RIGHT);
    }
 else {
      this.button.setHorizontalTextPosition(JButton.LEFT);
    }
  }
  if (button.getText().equals("String_Node_Str") && button.getIcon() != null && button.getIcon().getIconHeight() == button.getIcon().getIconWidth()) {
    Dimension dim=button.getPreferredSize();
    button.setMinimumSize(new Dimension(dim.height,dim.height));
    button.setPreferredSize(new Dimension(dim.height,dim.height));
  }
  super.layout();
}