commit https://github.com/vim/vim/commit/d22e9465f6228207a4fe722ee84371c7817060d6 Author: Bram Moolenaar <Bram@vim.org> Date: Tue Mar 15 17:43:55 2016 +0100 patch 7.4.1574 Problem: ":undo 0" does not work. (Florent Fayolle) Solution: Make it undo all the way. (closes https://github.com/vim/vim/issues/688)

TYPEMAP
VIWIN	T_VIOBJNOMUNGE
VIBUF	T_VIOBJNOMUNGE

INPUT
T_VIOBJNOMUNGE
	if (sv_isa($arg, \"${ntype}\")) {
	    IV tmp = SvIV((SV*)SvRV($arg));
	    $var = INT2PTR($type, tmp);
	    if (!tmp)
		croak(\"$ntype no longer exists\");
	}
	else
	    croak(\"$var is not of type ${ntype}\")