ec2471a356
As with xdg-toplevel proper, a legacy xdg-toplevel can be unmanaged by the compositor without the client knowing about it, meaning the client may still send updates and make requests. Handle this gracefully by ignoring them. The client needs to reassign the surface the legacy xdg-toplevel role again, if it wants to remap the same surface, meaning all state would be reset anyway. Closes: https://gitlab.gnome.org/GNOME/mutter/issues/240 (cherry picked from commit 64df6276881c5f42c6d2054d556d8cd391f7ee70)