NPE in FormEntryViewModel.openHierarchy (FormEntryViewModel.java:168)

[grzesiek2010]

Problem description

https://console.firebase.google.com/u/0/project/api-project-322300403941/crashlytics/app/android:org.odk.collect.android/issues/03147c13c9da44fbcac20c45245ab68a?time=last-thirty-days&versions=v1.29.2%20(4041)&sessionEventKey=5FF5E1EA03250001636881A4C1C3828B_1493128585116586318

Fatal Exception: java.lang.NullPointerException: Attempt to invoke virtual method 'org.odk.collect.android.formentry.audit.AuditEventLogger org.odk.collect.android.javarosawrapper.FormController.getAuditEventLogger()' on a null object reference
       at org.odk.collect.android.formentry.FormEntryViewModel.openHierarchy(FormEntryViewModel.java:168)
       at org.odk.collect.android.formentry.FormEntryMenuDelegate.onOptionsItemSelected(FormEntryMenuDelegate.java:130)
       at org.odk.collect.android.activities.FormEntryActivity.onOptionsItemSelected(FormEntryActivity.java:1035)
       at android.app.Activity.onMenuItemSelected(Activity.java:3274)
       at androidx.fragment.app.FragmentActivity.onMenuItemSelected(FragmentActivity.java:383)
       at androidx.appcompat.app.AppCompatActivity.onMenuItemSelected(AppCompatActivity.java:228)
       at androidx.appcompat.view.WindowCallbackWrapper.onMenuItemSelected(WindowCallbackWrapper.java:109)
       at androidx.appcompat.view.WindowCallbackWrapper.onMenuItemSelected(WindowCallbackWrapper.java:109)
       at androidx.appcompat.app.ToolbarActionBar$2.onMenuItemClick(ToolbarActionBar.java:65)
       at androidx.appcompat.widget.Toolbar$1.onMenuItemClick(Toolbar.java:207)
       at androidx.appcompat.widget.ActionMenuView$MenuBuilderCallback.onMenuItemSelected(ActionMenuView.java:779)

in logs we can find this:

E/null: java.lang.IllegalStateException: ensureFormController called before formLoaded

that indicates formController in FormEntryViewModel is null and it tries to get it from the application class (fix #4328) but it's still null.

What's interesting all the reports (except of the first one) don't contain any logs about displayed screens what is normal in case of any other crashes. Would that maybe indicated that the app is started form an external app and a user is able to open the hierarchy view before formConreoller is set? I wasn't able to reproduce such a scenario.