use get_tagged_oid()
Avoid derefencing ->tagged without checking for NULL by using the
convenience wrapper for getting the ID of the tagged object. It die()s
when encountering a broken tag instead of segfaulting.
Signed-off-by: René Scharfe <l.s.r@web.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
diff --git a/ref-filter.c b/ref-filter.c
index f27cfc8..8dcc17c 100644
--- a/ref-filter.c
+++ b/ref-filter.c
@@ -1766,7 +1766,7 @@ static int populate_value(struct ref_array_item *ref, struct strbuf *err)
* If it is a tag object, see if we use a value that derefs
* the object, and if we do grab the object it refers to.
*/
- oi_deref.oid = ((struct tag *)obj)->tagged->oid;
+ oi_deref.oid = *get_tagged_oid((struct tag *)obj);
/*
* NEEDSWORK: This derefs tag only once, which
@@ -1997,7 +1997,7 @@ static const struct object_id *match_points_at(struct oid_array *points_at,
if (!obj)
die(_("malformed object at '%s'"), refname);
if (obj->type == OBJ_TAG)
- tagged_oid = &((struct tag *)obj)->tagged->oid;
+ tagged_oid = get_tagged_oid((struct tag *)obj);
if (tagged_oid && oid_array_lookup(points_at, tagged_oid) >= 0)
return tagged_oid;
return NULL;
