NPE described in 6827032 leads to api/javax_swing/interactive/DnDCompoundTests.html#DnDCompound manual jck test fail.

Problem could be easily reproduced since 6u10, so this is not a regression.
Use following simple program to reproduce the failure:
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;

public class JColorChooserTest extends JFrame {
  public static void main(String[] args) {
    new JColorChooserTest();
  }

  public JColorChooserTest() {
    try {
      UIManager.setLookAndFeel("com.sun.java.swing.plaf.nimbus.NimbusLookAndFeel");
    } catch(Exception e) {
      System.out.println("Error setting Nimbus LAF: " + e);
    }

    addWindowListener(new ExitListener());

    Container content = getContentPane();

    JColorChooser c = new JColorChooser();
    c.setDragEnabled(true);
    content.add(c);

    setSize(500, 500);
    setVisible(true);
  }
}
class ExitListener extends WindowAdapter {
  public void windowClosing(WindowEvent event) {
    System.exit(0);
  }
}

Just click in the preview area and youll get exception:
Exception in thread "AWT-EventQueue-0" java.lang.NullPointerException
        at javax.swing.plaf.basic.BasicColorChooserUI$Handler.mousePressed(BasicColorChooserUI.java:220)
        at java.awt.Component.processMouseEvent(Component.java:6260)
        at javax.swing.JComponent.processMouseEvent(JComponent.java:3267)
        at java.awt.Component.processEvent(Component.java:6028)
        at java.awt.Container.processEvent(Container.java:2041)
        at java.awt.Component.dispatchEventImpl(Component.java:4630)
        at java.awt.Container.dispatchEventImpl(Container.java:2099)
        at java.awt.Component.dispatchEvent(Component.java:4460)
        at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4574)
        at java.awt.LightweightDispatcher.processMouseEvent(Container.java:4235)
        at java.awt.LightweightDispatcher.dispatchEvent(Container.java:4168)
        at java.awt.Container.dispatchEventImpl(Container.java:2085)
        at java.awt.Window.dispatchEventImpl(Window.java:2478)
        at java.awt.Component.dispatchEvent(Component.java:4460)
        at java.awt.EventQueue.dispatchEvent(EventQueue.java:599)
        at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:269)
        at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:184)
        at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:174)
        at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:169)
        at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:161)
        at java.awt.EventDispatchThread.run(EventDispatchThread.java:122)