Filed https://gitlab.gnome.org/GNOME/gtk/issues/2221 in case it's an upstream bug. I'll probably regret that.
** Bug watch added: gitlab.gnome.org/GNOME/gtk/issues #2221 https://gitlab.gnome.org/GNOME/gtk/issues/2221 -- You received this bug notification because you are a member of Ubuntu Desktop Bugs, which is subscribed to gtk+2.0 in Ubuntu. https://bugs.launchpad.net/bugs/1849873 Title: Cannot compile programs that use gtk.h and -Werror To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gtk+2.0/+bug/1849873/+subscriptions -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs