1) Write a simple negative (junit) test that uses AccessController.checkPermission

public void testACCNeg() {

try {
            AccessController.checkPermission(new TestPermission("nonExistPermission"));
            fail("Authorzation check should have failed");
        } catch (SecurityException se) {
            // ignore
        }
}

2) Run this test with -Djava.security.debug=failure, and you will see output similar to the following:

     [java] TestCase: testACCNeg
     [java] ERROR Message: java.lang.NullPointerException
     [java]     at java.security.AccessControlContext.checkPermission(AccessControlContext.java:311)
     [java]     at java.security.AccessController.checkPermission(AccessController.java:546)

3) Here is the offending code in AccessController.java:

		    if (!dumpDebug) {
			debug.println("access denied " + perm);
		    }

The conditional is incorrect and the field debug is null -- hence the NPE. The "!" should be removed.

Release Regression From : 6u3
The above release value was the last known release where this 
bug was not reproducible. Since then there has been a regression.

Release Regression From : 6
The above release value was the last known release where this 
bug was not reproducible. Since then there has been a regression.

Release Regression From : 6
The above release value was the last known release where this 
bug was not reproducible. Since then there has been a regression.