JOGL crash on close window

Using any JOGL sample code such as:

import java.awt.event.KeyEvent;
import java.awt.event.KeyListener;
import java.io.FileInputStream;
import java.io.IOException;

import javax.media.opengl.DebugGL;
import javax.media.opengl.GL;
import javax.media.opengl.GLAutoDrawable;
import javax.media.opengl.GLCanvas;
import javax.media.opengl.GLCapabilities;
import javax.media.opengl.GLEventListener;
import javax.media.opengl.glu.GLU;
import javax.swing.JFrame;

import com.sun.opengl.util.Animator;

@SuppressWarnings("serial")
public class JOGLViewer extends JFrame implements GLEventListener, KeyListener {

 private static float t=0;
 private static float deltaZ=0;

 public JOGLViewer() throws IOException {

  setLocation(900, 750);
  setSize(320, 240);
  setTitle("Jogl Viewer");

  GLCanvas canvas = new GLCanvas(new GLCapabilities());
     canvas.addGLEventListener(this);
     getContentPane().add(canvas);

     //Create an Animator linked to the Canvas
     Animator animator = new Animator(canvas);
     animator.start();

     addKeyListener(this);
 }

 /**
  * Sets up the screen.
  *
  * @see javax.media.opengl.GLEventListener#init(javax.media.opengl.GLAutoDrawable)
  */
 public void init(GLAutoDrawable drawable) {
  drawable.setGL(new DebugGL(drawable.getGL()));
  final GL gl = drawable.getGL();

  gl.glShadeModel(GL.GL_SMOOTH);
  gl.glClearColor(1, 1, 1, 1);
 }

 /**
  * The only method that you should implement by yourself.
  *
  * @see javax.media.opengl.GLEventListener#display(javax.media.opengl.GLAutoDrawable)
  */
 public void display(GLAutoDrawable drawable) {

  final GL gl = drawable.getGL();
  final GLU glu = new GLU();

  gl.glClear(GL.GL_COLOR_BUFFER_BIT | GL.GL_DEPTH_BUFFER_BIT);

        gl.glLoadIdentity();
        glu.gluLookAt(0,0, 10, 0, 0, 0, 0, 1, 0);

  gl.glRotatef(0.1f*t, 0.5f, 1, 0);
  t++;

  gl.glPushMatrix();
  {
   //gl.glColor3f(0.7f,1,0.7f);
   gl.glScalef(10, 10, 10);
  }
  gl.glPopMatrix();
 }

 /**
  * Resizes the screen.
  *
  * @see javax.media.opengl.GLEventListener#reshape(javax.media.opengl.GLAutoDrawable,
  * int, int, int, int)
  */
 public void reshape(GLAutoDrawable drawable, int x, int y, int width, int height) {
  final GL gl = drawable.getGL();
  final GLU glu = new GLU();

        gl.glViewport(0, 0, width, height);
        gl.glMatrixMode(GL.GL_PROJECTION);
        gl.glLoadIdentity();
        glu.gluPerspective(45.0f, (float) width / (float) height, 1.0, 200.0);
        gl.glMatrixMode(GL.GL_MODELVIEW);
        gl.glLoadIdentity();
 }

 /**
  * Changing devices is not supported.
  *
  * @see javax.media.opengl.GLEventListener#displayChanged(javax.media.opengl.GLAutoDrawable,
  * boolean, boolean)
  */
 public void displayChanged(GLAutoDrawable drawable, boolean modeChanged, boolean deviceChanged) {
  throw new UnsupportedOperationException("Changing display is not supported.");
 }

 public void keyPressed(KeyEvent e) {
  if(e.getKeyCode()==KeyEvent.VK_A){
   deltaZ+=0.05;
  }
  if(e.getKeyCode()==KeyEvent.VK_B){
   deltaZ-=0.05;
  }
 }

 public void keyReleased(KeyEvent e) {
 }

 public void keyTyped(KeyEvent e) {
 }

 /**
  * Starts the JOGL viewer.
  *
  * @param args
  * Command line args.
  */
 public final static void main(String[] args) throws IOException {
  JOGLViewer viewer = new JOGLViewer();
  viewer.setDefaultCloseOperation(EXIT_ON_CLOSE);
  viewer.setVisible(true);
 }
}

Crashed the JVM on exit.

My Ubuntu is:
Description: Ubuntu 10.10
Release: 10.10

It was supposed to exit without crash.