OverlayEntry crashes the app when changing page

[jonas-martinez]

How to make the overlayEntry crash the app ?

1. Create a page with an overlayEntry
2. open the overlayEntry by clicking on a button
3. close the overlayEntry by clicking on a button inside the overlay
4. Change page

The application should crash with error :

LateInitializationError: Field 'overlayEntry' has not been initialized.

This error might be coming from the fact that we removed the overlay at step 3 and when doing step 4, the deactivate method might be called on the overlay which is trying to access overlayEntry.mounted but the overlayEntry variable is not defined because of step 3.