JDK118: NullPointerException is thrown continuously when moving mouse in Frame

fumihiko.iwabuchi@japan 1998-12-04

java.lang.NullPointerException is thrown continuously when moving the cursor inside
Frame.

This problems happens on Solaris2.6 SPARC, Solaris X86, WindowsNT4.0 and Windows98
with build "C".

How to reproduce:

1) Go to the demo directory.
2) Run appletviewer in each directory.
   appletviewer example1.html
3) Move the mouse inside Frame and gets the exception output continuously.

iwabuchi@dandelion> appletviewer example1.html
Exception occurred during event dispatching:
java.lang.NullPointerException
        at java.awt.LightweightDispatcher.updateCursor(Container.java:1846)
        at java.awt.LightweightDispatcher.dispatchEvent(Container.java:1537)
        at java.awt.Container.dispatchEventImpl(Container.java:937)
        at java.awt.Component.dispatchEvent(Component.java:1744)
        at java.awt.EventDispatchThread.run(EventDispatchThread.java:79)
Exception occurred during event dispatching:
java.lang.NullPointerException
        at java.awt.LightweightDispatcher.updateCursor(Container.java:1846)
        at java.awt.LightweightDispatcher.dispatchEvent(Container.java:1537)
        at java.awt.Container.dispatchEventImpl(Container.java:937)
        at java.awt.Component.dispatchEvent(Component.java:1744)
        at java.awt.EventDispatchThread.run(EventDispatchThread.java:79)
Exception occurred during event dispatching:
java.lang.NullPointerException
        at java.awt.LightweightDispatcher.updateCursor(Container.java:1846)
        at java.awt.LightweightDispatcher.dispatchEvent(Container.java:1537)
        at java.awt.Container.dispatchEventImpl(Container.java:937)
        at java.awt.Component.dispatchEvent(Component.java:1744)
        at java.awt.EventDispatchThread.run(EventDispatchThread.java:79)
Exception occurred during event dispatching:
java.lang.NullPointerException
        at java.awt.LightweightDispatcher.updateCursor(Container.java:1846)
        at java.awt.LightweightDispatcher.dispatchEvent(Container.java:1537)
        at java.awt.Container.dispatchEventImpl(Container.java:937)
        at java.awt.Component.dispatchEvent(Component.java:1744)
        at java.awt.EventDispatchThread.run(EventDispatchThread.java:79)
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If you invoke an application which uses Frame, you will have the same problem.

Very noisy, although I'm not sure if this error output is fatal or not.