I notice this happening in upgrades that relate to gtk-main.css. It might be worth looking at the history of changes to understand the change causing this to come in. If the line is not needed it should be deleted not because it is clearly harmful in some specific context so much as it is rather visible.
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1773045 Title: Radiance/gtk-3.20/gtk-main.css attempts to import nonexistent gnome- builder.css To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu-themes/+bug/1773045/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs