If system-crash-notification is calling mir_buffer_stream_get_graphics_region() on Unity7 desktop then that's a GTK bug. GTK shouldn't be calling Mir functions when it's not connected to a Mir server.
If system- crash-notificat ion is calling mir_buffer_ stream_ get_graphics_ region( ) on Unity7 desktop then that's a GTK bug. GTK shouldn't be calling Mir functions when it's not connected to a Mir server.