Closing the bug then, thanks. There was a matching dev binary but you hit a special case where the stable update failed verification and was removed and you were left on a version that doesn't exists anymore, that's one of the risk of opt-in for proposed updates.
** Changed in: gtk+3.0 (Ubuntu) Status: Incomplete => Invalid -- 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/1915092 Title: lib-gtk-3 / lib-gtk-3-dev NOT compatible To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gtk+3.0/+bug/1915092/+subscriptions -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs