From 8c87dc77ae45d7277001b1be2c88ea9062e11d72 Mon Sep 17 00:00:00 2001
From: "Shawn O. Pearce" <spearce@spearce.org>
Date: Sun, 24 Feb 2008 03:07:19 -0500
Subject: Protect peel_ref fallback case from NULL parse_object result

If the SHA-1 we are requesting the object for does not exist in
the object database we get a NULL back.  Accessing the type from
that is not likely to succeed on any system.

Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

diff --git a/refs.c b/refs.c
index 67d2a50..fb33da1 100644
--- a/refs.c
+++ b/refs.c
@@ -506,7 +506,7 @@ int peel_ref(const char *ref, unsigned char *sha1)
 
 	/* fallback - callers should not call this for unpacked refs */
 	o = parse_object(base);
-	if (o->type == OBJ_TAG) {
+	if (o && o->type == OBJ_TAG) {
 		o = deref_tag(o, ref, 0);
 		if (o) {
 			hashcpy(sha1, o->sha1);
-- 
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