Name: rmT116609 Date: 07/21/2004


FULL PRODUCT VERSION :
java version "1.5.0-beta3"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.5.0-beta3-b57)
Java HotSpot(TM) Client VM (build 1.5.0-beta3-b57, mixed mode, sharing)


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

A DESCRIPTION OF THE PROBLEM :
Hi,

    There are numerous JNI bugs in sun.awt.windows.WToolkit.eventLoop() both in JDK 1.4.2 and JDK 5.0 beta 3 releases. If you run the attached testcase with -Xcheck:jni, then close the JFrame that pops up you will get:

FATAL ERROR in native method: Bad global or local ref passed to JNI
        at sun.awt.windows.WToolkit.eventLoop(Native Method)
        at sun.awt.windows.WToolkit.run(WToolkit.java:269)
        at java.lang.Thread.run(Thread.java:595)

     This is a minimalistic example of the sort of errors I am getting in my more-complex application. The problem is that in my more complicated application this bug actually causes hangs/crashes to appear at random. .


REPRODUCIBILITY :
This bug can be reproduced always.

---------- BEGIN SOURCE ----------
import javax.swing.*;

public class Test
{
  public static void main(String[] args)
  {
    JFrame f = new JFrame();
    f.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
    f.setVisible( true );
  }
}
---------- END SOURCE ----------
(Incident Review ID: 286708)
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