run error sends me to code I didn't write

Question

Whenever I click a certain button, the app always dies and I'm sent to:

int main(int argc, char *argv[])
{
    NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];
    THIS LINE ==> int retVal = UIApplicationMain(argc, argv, nil, nil);
    [pool release];
    return retVal;
}

For those who are familiar, you know that I didn't write this code. I don't know how to find out where my error is!

Also, the output shows this:

2011-10-27 21:03:17.690 My Program[55441:207] Unbalanced calls to begin/end appearance transitions for <UITabBarController: 0x68181f0>.
(lldb)

I don't know where to look short of commenting out code line by line until I find the issue. Any suggestions?

that's not a bad strategy. Though a better one is to comment out *half* your code so that you can find the error in `log(N)` time. — ObscureRobot, Oct 28 '11 at 03:11
Commending out your apps main entry point (the line you've indicated) is not going to get you far. Try setting a breakpoint at the start of the button's method, and stepping through until the crash. — Kenny Winker, Oct 28 '11 at 03:17
@Kenny I was planning on commenting out the code related to the button that I push and starting there, not the `main` code (I realize now that I didn't make that clear). — Jacksonkr, Oct 28 '11 at 03:26
It's highly likely that you are using XCode 4.2. By the way, can you please paste your code snippet? Are you using that button to present a viewController? — Aniruddh, Oct 28 '11 at 05:18

score 1 · Answer 1 · edited May 23 '17 at 10:34

1

You are likely running the fact that Xcode 4.2 does not show stack traces most of the time. Check this SO post.

Xcode 4.2 debug doesn't symbolicate stack call

edited May 23 '17 at 10:34

Community

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answered Oct 28 '11 at 03:26

logancautrell

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I fixed the original issue, then got this "error" again for something else a while after. I tried the solution you sent over, but i'm still sent to `main` - I'll keep looking into it. +1 for your resource. – Jacksonkr Oct 28 '11 at 13:34

Jacksonkr · Accepted Answer · 2011-10-28T23:52:09.930

on the button click a new UIView is pushed into the Window. That view's .xib had linkage that was bad (linked to an IBOutlet that didn't exist in code anymore because it was renamed).

I set up the correct linkage in Interface Builder and I no longer got the error. I wish xcode would at least tell you there's a problem with one of your .xib files.

PART 2

Shortly after that fix I was getting this error again. After searching the web for a bit, I found that it could be related to a memory leak so I ran the Project->Analyze tool. When I fixed Xcode's suggestions, everything ran fine.

run error sends me to code I didn't write

2 Answers2