Summary:
There is a race condition in the following situation:

    - Server creates a global
    - Client binds to that global (making a new resource for that
global)
    Simultaneously:
    - The client uses this resource
    - The server deletes the global

This was fixed for Blur, but as mention in that commit can also happen here.
Code is effectively a copy and paste from e8850b01

Test Plan: Unit test. Booted normal session

Reviewers: #plasma

Subscribers: plasma-devel, #frameworks

Tags: #plasma_on_wayland, #frameworks

Differential Revision: https://phabricator.kde.org/D7885