commit 3da696db6ac6103eb8f07cf7be23fa0e12c2419d
author Ernie Rael <errael@raelity.com> Tue Sep 19 20:14:18 2023 +0200
committer Christian Brabandt <cb@256bit.org> Tue Sep 19 20:14:18 2023 +0200
tree 4530141a1e29cfefd403e2edf9c2ebeedcd2e967
parent 346ac1429c5afb23bace295106aea1b305443435

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>

src/vim9class.c

diff --git a/src/vim9class.c b/src/vim9class.c
index da862f2..f122f90 100644
--- a/src/vim9class.c
+++ b/src/vim9class.c
@@ -2865,6 +2865,9 @@
 	    || check_for_class_or_list_arg(argvars, 1) == FAIL)
 	return;
 
+    if (object_tv->vval.v_object == NULL)
+	return;
+
     if (classinfo_tv->v_type == VAR_LIST)
     {
 	FOR_ALL_LIST_ITEMS(classinfo_tv->vval.v_list, li)