Looking upstream it seems similar to https://gitlab.gnome.org/GNOME/gtk/issues/125 , the warning is indeed fixed in the current Ubuntu serie, could be a candidate to include if we do a SRU update for gtk but doesn't seem an high importance one/probably not worth an update by itself
** Package changed: libcanberra (Ubuntu) => gtk+3.0 (Ubuntu) ** Changed in: gtk+3.0 (Ubuntu) Status: Incomplete => Fix Released -- You received this bug notification because you are a member of Ubuntu Desktop Bugs, which is subscribed to gtk+3.0 in Ubuntu. https://bugs.launchpad.net/bugs/1816032 Title: gtk_widget_destroy reports error To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gtk+3.0/+bug/1816032/+subscriptions -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs