FULL PRODUCT VERSION :
java version "1.4.2_06"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.4.2_06-b03)
Java HotSpot(TM) Client VM (build 1.4.2_06-b03, mixed mode)

ADDITIONAL OS VERSION INFORMATION :
Microsoft Windows XP [Version 5.1.2600]

and

Machine hardware: sun4u
OS version: 5.8
Processor type: sparc
Hardware: SUNW,Sun-Blade-100

A DESCRIPTION OF THE PROBLEM :
MotifButtonUI.paintIcon produces a NullPointerException.

Source code in MotifButtonUI.paintIcon:
    Shape oldClip = g.getClip();
    ...
    Rectangle r = oldClip.getBounds();
The Exception came from here, oldClip seems to be null



STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
Start Netbeans 4.0 using Motif L&F on either a Windows XP or on a Solaris.


ERROR MESSAGES/STACK TRACES THAT OCCUR :
The stack trace:
java.lang.NullPointerException
        at com.sun.java.swing.plaf.motif.MotifButtonUI.paintIcon(MotifButtonUI.java:92)
        at javax.swing.plaf.basic.BasicButtonUI.paint(BasicButtonUI.java:248)
        at com.sun.java.swing.plaf.motif.MotifButtonUI.paint(MotifButtonUI.java:82)
        at javax.swing.plaf.ComponentUI.update(ComponentUI.java:142)
        at javax.swing.JComponent.paintComponent(JComponent.java:541)
        at org.netbeans.swing.tabcontrol.plaf.BasicScrollingTabDisplayerUI$TimerButton.paintComponent(BasicScrollingTabDisplayerUI.java:343)
        at javax.swing.JComponent.paint(JComponent.java:808)
        at javax.swing.JComponent.paintChildren(JComponent.java:647)
        at javax.swing.JComponent.paint(JComponent.java:817)
        at javax.swing.JComponent.paintChildren(JComponent.java:647)
        at javax.swing.JComponent.paint(JComponent.java:817)
        at javax.swing.JComponent.paintChildren(JComponent.java:647)
        at javax.swing.JComponent.paint(JComponent.java:817)
        at javax.swing.JComponent.paintChildren(JComponent.java:647)
        at javax.swing.JComponent.paint(JComponent.java:817)
        at javax.swing.JComponent.paintChildren(JComponent.java:647)
        at javax.swing.JSplitPane.paintChildren(JSplitPane.java:1021)
        at javax.swing.JComponent.paint(JComponent.java:817)
        at javax.swing.JComponent.paintChildren(JComponent.java:647)
        at javax.swing.JComponent.paint(JComponent.java:817)
        at javax.swing.JComponent.paintChildren(JComponent.java:647)
        at javax.swing.JComponent.paint(JComponent.java:817)
        at javax.swing.JLayeredPane.paint(JLayeredPane.java:557)
        at javax.swing.JComponent.paintChildren(JComponent.java:647)
        at javax.swing.JComponent.paint(JComponent.java:817)
        at javax.swing.JComponent.paintChildren(JComponent.java:647)
        at javax.swing.JComponent.paint(JComponent.java:817)
        at javax.swing.JComponent.paintChildren(JComponent.java:647)
        at javax.swing.JComponent.paint(JComponent.java:817)
        at javax.swing.JLayeredPane.paint(JLayeredPane.java:557)
        at javax.swing.JComponent.paintChildren(JComponent.java:647)
        at javax.swing.JComponent.paintWithOffscreenBuffer(JComponent.java:4794)
        at javax.swing.JComponent.paintDoubleBuffered(JComponent.java:4740)
        at javax.swing.JComponent.paint(JComponent.java:798)
        at java.awt.GraphicsCallback$PaintCallback.run(GraphicsCallback.java:21)
        at sun.awt.SunGraphicsCallback.runOneComponent(SunGraphicsCallback.java:60)
        at sun.awt.SunGraphicsCallback.runComponents(SunGraphicsCallback.java:97)
        at java.awt.Container.paint(Container.java:1312)
        at sun.awt.RepaintArea.paint(RepaintArea.java:177)
        at sun.awt.windows.WComponentPeer.handleEvent(WComponentPeer.java:260)
        at java.awt.Component.dispatchEventImpl(Component.java:3678)
        at java.awt.Container.dispatchEventImpl(Container.java:1627)
        at java.awt.Window.dispatchEventImpl(Window.java:1606)
        at java.awt.Component.dispatchEvent(Component.java:3477)
        at java.awt.EventQueue.dispatchEvent(EventQueue.java:456)
[catch] at java.awt.EventDispatchThread.pumpOneEventForHierarchy(EventDispatchThread.java:201)
        at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:151)
        at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:145)
        at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:137)
        at java.awt.EventDispatchThread.run(EventDispatchThread.java:100)



REPRODUCIBILITY :
This bug can be reproduced always.
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