I have a weird issue that comes up while releasing an object. In the object's dealloc method I am releasing another (sub) object. When this sub object is released I get an EXC_BAD_ACCESS error. I am pretty sure the sub-object is a valid pointer right before I call release on it.
This is how I've confirmed the weirdness - I set a break point inside the dealloc method, right before the release of the sub-object, and it is allocated! I can send it messages and it responds correctly. Another weird bug is that, if NSZombieEnabled is set to YES, I dont get an error at all, not even NSZombie's usual error that says I've sent a message to a deallocated object, the code runs properly.
Does anybody have any idea how to solve this?
Thanks in advance!
* EDIT 1 *
I've found out that if I place the [super dealloc] in the end of the dealloc, it crashes, but if I place it at start, it won't. I've had something similar before, only the other way - app crashed if I [super dealloc] in start of my dealloc, and didn't at the end.
Why does it make a difference and when should you use what?
* EDIT 2 *
Scratch Edit #1! It doesn't work either way.
Do your dealloc routine happen to look like this:
- (void)dealloc
{
[super dealloc];
[otherObject release];
}
if so, change the order. If you call [super dealloc], your object gets vanished from memory, trying to acces otherObject later will cause you to access non-allocated memory -> EXC_BAD_ACCESS.