Debugging app terminating with uncaught exception of type NSException

Every now and then when working on the new features, our app crashes. Easy, peasy, right? Happens all the time. However sometimes all you can see is: libc++abi.dylib: terminating with uncaught exception of type NSException and then you wonder: Where did the stack trace go? The error message is not really helpful and asking lldb for more info using expr $arg1 does not work. It may cause you to be stuck for a couple of hours, trying to pinpoint the cause of the exception. »