commit https://github.com/vim/vim/commit/9ec021a2b0dd35ba744a8e2a9430a643c85b922a Author: Bram Moolenaar <Bram@vim.org> Date: Sat Dec 12 16:23:29 2015 +0100 patch 7.4.970 Problem: Rare crash in getvcol(). (Timo Mihaljov) Solution: Check for the buffer being NULL in init_preedit_start_col. (Hirohito Higashi, Christian Brabandt)

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}\")