deref_tag: handle tag->tagged = NULL

Signed-off-by: Martin Koegler <mkoegler@auto.tuwien.ac.at> Signed-off-by: Junio C Hamano <gitster@pobox.com>
git-mirror · Feb 18, 2008 · 24e8a3c · 24e8a3c
1 parent affeef1
commit 24e8a3c
Showing 1 changed file with 4 additions and 1 deletion.
diff --git a/tag.c b/tag.c
@@ -9,7 +9,10 @@ const char *tag_type = "tag";
 struct object *deref_tag(struct object *o, const char *warn, int warnlen)
 {
 	while (o && o->type == OBJ_TAG)
-		o = parse_object(((struct tag *)o)->tagged->sha1);
+		if (((struct tag *)o)->tagged)
+			o = parse_object(((struct tag *)o)->tagged->sha1);
+		else
+			o = NULL;
 	if (!o && warn) {
 		if (!warnlen)
 			warnlen = strlen(warn);