commit https://github.com/vim/vim/commit/680e015bfe19be6772d3bd754486fbd45c1a9d3b Author: Bram Moolenaar <Bram@vim.org> Date: Sun Sep 25 20:54:11 2016 +0200 patch 8.0.0010 Problem: Crash when editing file that starts with crypt yeader. (igor2x) Solution: Check for length of text. (Christian Brabandt) Add a test.

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}\")