It seems the observer either needs to be removed when it is dealloced/destroyed (Otherwise Notification Centre would send the notification to the destroyed object resulting in crash.)
and we need to do the below in dealloc, which solves the crash in my system. NSNotificationCenter *nc = [NSNotificationCenter defaultCenter]; [nc removeObserver:self] But it is not done for LWCToolkit, so I changed the observer as is being done there, to make existing @implementation class as observer ------------- Commit messages: - 8248532: Every time I change keyboard language at my MacBook, Java crashes Changes: https://git.openjdk.java.net/jdk/pull/28/files Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=28&range=00 Issue: https://bugs.openjdk.java.net/browse/JDK-8248532 Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod Patch: https://git.openjdk.java.net/jdk/pull/28.diff Fetch: git fetch https://git.openjdk.java.net/jdk pull/28/head:pull/28 PR: https://git.openjdk.java.net/jdk/pull/28
