commit https://github.com/vim/vim/commit/5ad075c0735d3d8b97708d17c22de8facb15f997 Author: Bram Moolenaar <Bram@vim.org> Date: Tue Nov 24 15:18:32 2015 +0100 patch 7.4.937 Problem: Segfault reading unitialized memory. Solution: Do not read match \z0, it does not exist. (Marius Gedminas, closes https://github.com/vim/vim/issues/497)

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}\")