My iOS app has lots of network features. I of course save important data to the filesystem for offline viewing and so on, and it used to work perfectly without any problems. Now, when I try to test this with Airplane mode on to simulate no internet connection, GDB outputs this:
2011-04-17 21:34:13.291 Bronto Backup Mobile App[195:307] *** -[UIAlertView release]: message sent to deallocated instance 0x3e93630
I have tried malloc debug in gdb, but it tells me the process isn’t running or that the command is not found. How would I go about figuring out where the bug happened? backtrace gave me nothing but the usual NSAutoreleasePoolPop stuff.
For the love of me, I just can not track down where this bug is. NSZombiesEnabled tells me the address, but the malloc_history pid 0x3e93630 is just plain out throwing me an error, saying that gdb does not know this command, even with info in front.
Something is being under-retained or over-released. Run your app in Instruments using the Zombies template. That will show you what object had the memory issue, and will let you see the entire retain/release history of that object. That should point you in the right direction.