Where does NSKVOPendingNotificationCreate come from?

I'm getting an object called after being deallocated and it is being called from NSKVOPendingNotifi开发者_开发知识库cationCreate. What is it and what does it do?

It's an internal part of the KVO notification system in Foundation. What it does isn't particularly important, but what the crash is telling me is that an object's lifetime has been mismanaged.

You could run your application with the NSZombieEnabled environment variable set to YES and that would tell you which object was being messaged after deallocation.