Specific crash since iOS 13.2

Originator:GasanovM
Number:rdar://FB7543829 Date Originated:20/01/2020
Status:Open Resolved:
Product:UIKit Product Version:
Classification:Application Crash Reproducible:
 
Since the launch of iOS 13.2, we've been seeing a steadily rising level of a specific crash. This crash seems to be completely inside UIKit, although some action in our app is obviously "triggering" it.

Of course, I’ve attached a few crash report files.

But also there is a top part of call-stack:

objc_msgSend
-[UIView(Internal) _addSubview:positioned:relativeTo:]
-[UIInputWindowController changeToInputViewSet:]
-[UIInputWindowController setInputViewSet:]
+[UIView(Animation) performWithoutAnimation:]
-[UIInputWindowController setInputViewSet:]
-[UIInputWindowController performOperations:withAnimationStyle:]
-[UIInputResponderController setKeyWindowSceneInputViews:animationStyle:]
-[UIInputResponderController setInputViews:animationStyle:]
-[UIInputResponderController forceOrderOutAutomaticExceptAccessoryView]
-[UIKeyboardAutomatic willResume:]
-[NSNotificationCenter addObserver:selector:name:object:]
__CFNOTIFICATIONCENTER_IS_CALLING_OUT_TO_AN_OBSERVER__
___CFXRegistrationPost1_block_invoke
_CFXRegistrationPost1
___CFXNotificationPost_block_invoke
-[_CFXNotificationRegistrar find:object:observer:enumerator:]
_CFXNotificationPost
-[NSNotificationCenter postNotificationName:object:userInfo:]
-[UIApplication _sendWillEnterForegroundCallbacks]

I also have found an already started discussion at https://forums.developer.apple.com/thread/125447

Comments


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