I wrote that it doesn’t crash if I call [Fabric with:@[TwitterKit, CrashlyticsKit]] instead of [Fabric with:@[TwitterKit, CrashlyticsKit]], but I had to take that back because it crashed again even with TwitterKit in front of CrashlyticsKit.
I’m calling [Fabric with:…] from didFinishLaunchingWithOptions: in my app delegate.
So when it crashes, it crashes immediately after launch. If not, no matter how long I wait, it does not crash at all.
I also use Core Data in my app a lot, and it never gave me trouble like this.
But it does look like just a breakpoint as you suggested in second reply, because I keep pressing run button (three times), app just runs as usual, even though I have no idea whether something broken internally in TwitterKit or not.
Again, it didn’t happen until I updated to TwitterKit 1.5.1.