crash on iOS 13

[cmckni3]

Crashes as soon as I tap on a view or becomeFirstResponder is called.

Below seems to be the offending block of code but not sure.

          context.performBlockAndWait ->{
            coordinator = @store_manager.current
            context.persistentStoreCoordinator = coordinator

            NSNotificationCenter.defaultCenter.addObserver(self, selector:"did_finish_import:", name:NSPersistentStoreDidImportUbiquitousContentChangesNotification, object:nil)
            @observed_context = context
          }

[cmckni3]

@andrewhavens @wndxlori are you seeing this issue in any apps?

[andrewhavens]

@cmckni3 I'm not currently using CDQ on any of my "up-to-date apps", so I can't verify.