Question

I have a problem with debugging my xcode project.
When my app crashes i get an unreadable stacktrace like this:

2011-10-25 10:03:29.966 fruehstueck[2541:707] *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '*** -[__NSArrayM insertObject:atIndex:]: object cannot be nil'
*** First throw call stack:
(0x352918bf 0x303ce1e5 0x351e620f 0x2c381 0x46f6d 0x3138f7ff 0x3139bc39 0x3139baa9 0x3139b98f 0x3139b211 0x3139af53 0x3138f673 0x3138f349 0x3a347 0x3aa87 0x351eb435 0x3147473f 0x3137050f 0x3136ff01 0x313564ed 0x31355d2d 0x3717be13 0x35265553 0x352654f5 0x35264343 0x351e74dd 0x351e73a5 0x3717afed 0x31384743 0x2e01 0x2dc0)

The Code itself doesn’t stop in my sourcecode but in line “int retVal = …” with an SIGBART signal received.

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

Can somebody please tell me if i can get back my used stacktrace, where at least I can look up in which line my app crashed?

Thx in advance,
Maverick

Answer 1

Its fairly simple:

-[__NSArrayM insertObject:atIndex:]: object cannot be nil

If you want to track it down and you know the steps, it would not take too long to guess which “insertObject” call is being given a nil pointer.

For getting proper stack-trace, have you tried cleaning the build? Also, try with breakpoints on. (and make sure you are not using a beta version of XCode).