Be careful when dereferencing tags.

One caller of deref_tag() was not careful enough to make sure
what deref_tag() returned was not NULL (i.e. we found a tag
object that points at an object we do not have).  Fix it, and
warn about refs that point at such an incomplete tag where
needed.

Signed-off-by: Junio C Hamano <junkio@cox.net>

1 files changed, 1 insertions, 1 deletions

diff --git a/sha1_name.c b/sha1_name.c
index fe409fbce4..be1755a70b 100644
--- a/sha1_name.c
+++ b/sha1_name.c
@@ -349,7 +349,7 @@ static int peel_onion(const char *name, int len, unsigned char *sha1)
 	if (!o)
 		return -1;
 	if (!type_string) {
-		o = deref_tag(o);
+		o = deref_tag(o, name, sp - name - 2);
 		if (!o || (!o->parsed && !parse_object(o->sha1)))
 			return -1;
 		memcpy(sha1, o->sha1, 20);