Hello Guenter Grodotzki, (I guess you wanted me to receive your last message, so you should use "reply all", or it gets just attached to your bug report.)
I have left a note in this upstream report [1], lets see if they agree. Kind regards, Bernhard [1] https://gitlab.gnome.org/GNOME/gnome-shell/issues/822#note_484642 PS.: My untested change in message 10 might not crash, but lead to an infinitive loop, as app->running_state might not change anymore...
