For me it was the name of an CoreData entity attribute. It is not allowed to start an attribute name with "new...". Nothing in Xcode does tell you that and it took me days to find out. I just got the EXC_BAD_ACCESS error. Just wanted to leave this here for the next poor soul facing my specific problem ;) The reason for this is explained here: https://developer.apple.com/library/archive/releasenotes/ObjectiveC/RN-TransitioningToARC/Introduction/Introduction.html#//apple_ref/doc/uid/TP40011226-CH1-SW14 I came across this article that lead me to the solution: https://alexj.org/11/core-data-attribute-naming

Did you get more information on this?

Same error here, since iOS 16. The crashed for my app in the AppStore increased by almost a few 100% since iOS 16 (and still in 16.1). I have absolutely no indication why this is happening. I can't reproduce this error at all.

I have the same problem (FB10893334)

Same here on an intel MacBook Pro 16GB. Never had such a slow Xcode. Takes at least 20 time longer than with latest Xcode 12.