UINavigationController popViewControllerAnimated: crash in iOS 6

Question

The code below works fine in iOS 4 and 5 but crashes in iOS 6 with EXC_BAD_ACCESS. I\'d appreciate any help in troubleshooting it. This code is being called in

Answer 1

I know my question was vague, but I didn't have much else to go off of. I knew the line [self.navigationController popViewControllerAnimated:NO]; was the problem but I couldn't figure out why. Then I came across this question and the first answer suggested I make my search table an instance variable rather than creating a new one every time I want to present it, and that actually worked. It must be a memory issue that I can't wrap my head around.

tl;dr :

Make sure the UIViewController that's being pushed and popped is an instance variable.