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I’m getting an EXC_BAD_ACCESS crash at startup and Xcode says the crash is at the NSApplicationMain line in my main.m file. The crash happens 99% of the time and when I run it with zombies enabled the crash never happens. Has anyone seen this before? How can I possibly debug this?
If you are running Xcode4 there default is to show very little of the call stack, move the slider at the bottom to the right. You may well not find any of your code but you should be able to get a good idea of what was going on. If it was a notification or selector after delay you will see that the Runloop dispatch and that will also give you a clue.
Finally, go old school, the way we did it in the day of coding forums, punch cards and only a couple of compiles a day: study your code. Know what every line of code does and why it is there.
As @Danra said, do run the Xcode Analyzer and fix all complaints.