WordPress app crashing on AppleAuthenticator.swift

[sentry-io]

Sentry Issue: WORDPRESS-IOS-455X

EXC_BREAKPOINT: Fatal error > WordPressAuthenticator/AppleAuthenticator.swift
  File "AppleAuthenticator.swift", in AppleAuthenticator.showLoginEpilogue
  File "AppleAuthenticator.swift", line 113, in AppleAuthenticator.loginSuccessful
  File "AppleAuthenticator.swift", line 281, in AppleAuthenticator.createWordPressComUser
  File "WordPressAuthenticationManager.swift", line 681, in WordPressAuthenticationManager.syncWPCom
  File "<compiler-generated>", in WordPressAuthenticationManager.syncWPCom
...
(14 additional frame(s) were not displayed)

[dangermattic]

Thanks for reporting! 👍

[dvdchr]

The crash occurred on this line due to either the showFromViewController object being nil, or it doesn't have a navigationController:

        guard let navigationController = showFromViewController?.navigationController else {
            fatalError()
        }

Based on the logs, here's a possible reproduction step:

• Create a new account via Sign In With Apple.
• Add a new site and select 'Add a self-hosted site'.
• Suspend/minimize the app.
• Open the app again.
• 🔎 Observe if 🔵 Tracked: signed_in <source: apple> is logged again in the console.
• 🔎 Observe that the app crashes.