Hi,
Bug :
This is regarding a NPE getting printed as stacktrace in
java.awt.Toolkit.createCustomCursor() method.
The bug is described at : https://bugs.openjdk.java.net/browse/JDK-8160421
Root Cause :
Fix of bug JDK-8139192 : Custom ImageFilters return blank images in Java
8(.45) while working in 7.
The above fix added a RuntimeException catch & log mechanism to support a
ImageFilter which was broken due to the second imageComplete() call in
OffScreenImageSource.produce() method.
Analysis:
Without the fix of JDK-8139192, java.awt.Toolkit.createCustomCursor() call
results in
NullPointerException when imageComplete(ImageConsumer.STATICIMAGEDONE) call
is made - but, it gets consumed silently.
Cathing RuntimeException() out of
imageComplete(ImageConsumer.STATICIMAGEDONE) was added to fix JDK-8160421.
This started catching & logging the exception in case 'theConsumer' has
unregistered itself as a result of call
theConsumer.imageComplete(ImageConsumer.SINGLEFRAMEDONE);
This log is undesirable as this mechanism is used in
java.awt.Toolkit.createCustomCursor() and may be in other places.
Fix :
Make the call to imageComplete(ImageConsumer.STATICIMAGEDONE) only if
'theConsumer' has not been unregistered.
Webrev:
http://cr.openjdk.java.net/~aghaisas/8160421/webrev.00/
Request you to review.
Regards,
Ajit
