Bug#1050512: gnome-shell: Crash when viewing video with mpv

[Marc Glisse]

It looks like my stack trace is useless because I forgot to set 
MUTTER_SYNC=1 :-(

It seems likely that this is the same bug as 
https://gitlab.gnome.org/GNOME/mutter/-/issues/2857 (sadly not fixed yet).

--
Marc Glisse