fbe7a8df3a
There's still a possibility that some events remain within the `ClutterMainContext` when it's being unref-ed for the last time (as seen on asan logs). Make sure they get freed by using `g_async_queue_new_full()` and specifying the appropriate destroy function. Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/2817>