Hello, please review the fix
http://cr.openjdk.java.net/~azvegint/jdk/9/8140311/00/ for the issue https://bugs.openjdk.java.net/browse/JDK-8140311 This issue is only reproducible when a window using CWarningWindow.After window close we cancel HidingTask in CWarningWindow at java level, however we do not cancel delayed execution of "perform" selector at native level. At this point cached JNIEnv value becomes invalid, which is leading to crash.
-- Thanks, Alexander.
