I just spent ~1 hour tracking down a crash. The problem was that my object wasn’t unregistering its notification observer on dealloc. Why did this take so long to figure out? Well, it didn’t help that the backtrace in the core was useless[1]. The only hint I had that it was a dead object causing the pain was gdb was nice enough to tell me:

Program received signal:  "EXCBADACCESS”.

So remember, unregister your observers when you die.

[1] - in hindsight, there were plenty of crumbs lying around: notification posting was all over the stack, EXCBADACCESS, and the fact that it happened after closing a document should have been enough, but not this morning.

This entry was posted on Wednesday, April 5th, 2006 at 4:54 am and is filed under roobasoft. You can follow any responses to this entry through the RSS 2.0 feed. You can leave a response, or trackback from your own site.