patch 9.0.1911: Vim9: segfault with null object and instanceof() Commit: https://github.com/vim/vim/commit/3da696db6ac6103eb8f07cf7be23fa0e12c2419d Author: Ernie Rael <errael@raelity.com> Date: Tue Sep 19 20:14:18 2023 +0200 patch 9.0.1911: Vim9: segfault with null object and instanceof() Problem: Vim9: segfault with null object and instanceof() Solution: return early closes: #13121 Signed-off-by: Christian Brabandt <cb@256bit.org> Co-authored-by: Ernie Rael <errael@raelity.com>

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}\")