Bug#832077: gvim is affected by this bug
That warning has been widely reported for countless packages and should be resolved by the app developer. Still, to keep people happy until then, it will be silenced by default in GTK+ 3.22.1 (accidentally got omitted in 3.22.0) https://git.gnome.org/browse/gtk+/commit/?id=54fdcb3ffac3383432b379f3e16e8cb0086b8101
Bug#832077: gvim is affected by this bug
Starting gvim from terminal emits: (gvim:25334): Gtk-WARNING **: GtkWindow 0x81964260 is drawn without a current allocation. This should not happen. Several times. I am on testing distribution, libgtk-3-0 version 3.21.5-3:i386. Fedora 24 version is 3.20.9-1 and does not emit the warnings.