commit https://github.com/vim/vim/commit/72188e9aae26e6191c68ff673ef145104b17c64f Author: Bram Moolenaar <Bram@vim.org> Date: Mon Mar 28 22:48:29 2016 +0200 patch 7.4.1682 Problem: Coverity: no check for NULL. Solution: Add check for invalid argument to assert_match().

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}\")