We're having some strange issue with our app and/or Testflight since a few days ago: our app runs fine on simulator and devices (iOS 12, iOS 14 & iOS 15) when run from Xcode, but it crashed at launch when we archive and distribute it via Testflight for iOS 14 and below, but NOT for iOS 15 (we haven't tried to actually release to the AppStore). The app was working perfectly fine on iOS 12+ until then, on Testflight or otherwise. No crash log is ever generated by these crashes (either on Crashlytics, or Organizer, or even in the device crash logs), and what's more mysterious is that when re-archiving past versions of the code that had no issues 3 weeks ago and are live on the app store, we are now getting the crashes. We've dug into the device logs to try and get some more info, and we could find
com.apple.stability.crash {"appVersion":"3.3.1","bundleID":"com.cobble.ios","exceptionCodes":"0x0000000000000000, 0x0000000000000000","incidentID":"B47DF725-343B-4D8E-A1C4-8F52EB5766C1","logwritten":1,"process":"Cobble Production","terminationReasonExceptionCode":"0x1","terminationReasonNamespace":"DYLD"}
for iOS 14, and
Process exited: <FBApplicationProcess: 0x10a2dd110; Cobble Producti (com.cobble.ios); pid: -1> -> <FBApplicationProcessExitContext: 0x28331a100; exitReason: (none); terminationReason: (none)> {
stateAtExit = <FBProcessState: 0x283cd8cc0; pid: 4156; taskState: Not Running; visibility: Unknown>;
}
for iOS 12.
We haven't had any luck so far figuring out what the issue(s) can be, but we've tried a lot of things from building on different computers, playing around in the build settings, updating our pods, to fully uninstalling/reinstalling Xcode and the project from Github.. It might be worth noting that we're using automatic signing from Xcode (changing that is our next test)
Any help would be greatly appreciated!!
We've also posted this question on StackOverflow (https://stackoverflow.com/questions/70316323/ios-app-crashes-at-launch-on-testflight-for-ios-14-and-below-but-not-ios-15)
We've ended up finding a solution for our issue:
- we're using the new Xcode 13.2RC (not ideal since it's not a final release yet, but no luck without it) - you'll need the latest MacOS to run it
- we've removed support for iOS 12 from our build (which thankfully we could afford to do since only a tiny fraction of our users were still using that version)
These 2 things are both required on our end, trying to do one without the other would still show us the crashes.
I don't know if this is going to be the solution for everybody, so here's a link we've used to get some ideas: https://developer.apple.com/forums/thread/696197
Also wanted to add to the things we've tested while debugging:
- From Xcode Organizer, distributing as Dev or Ad Hoc an archive that presents the issue on Testflight does NOT present the issue when installing directly to device, which reinforces the idea this is not a code/archive issue
- We've switched automated app signing to manual using all sorts of provisioning profiles (ad hoc, dev & distribution, using either iOS-only or Apple certificates), and the issue only presents itself when distributing to Testflight/Store using the distribution profiles
At the end of the day, it does look like an Apple issue and we would expect to see a fix soon - especially since more and more people have been faced with a similar problem.
