list-objects.c::process_tree/blob: check for NULL

As these functions are directly called with the result
from lookup_tree/blob, they must handle NULL.

Signed-off-by: Martin Koegler <mkoegler@auto.tuwien.ac.at>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

diff --git a/list-objects.c b/list-objects.c
index 4ef58e7ec01ebdfc6f036ccafaf837b2b38ed7a5..c8b8375e4983794e601ba69a1c217a3c711835e9 100644 (file)
--- a/list-objects.c
+++ b/list-objects.c
@@ -18,6 +18,8 @@ static void process_blob(struct rev_info *revs,
 
        if (!revs->blob_objects)
                return;
+       if (!obj)
+               die("bad blob object");
        if (obj->flags & (UNINTERESTING | SEEN))
                return;
        obj->flags |= SEEN;
@@ -69,6 +71,8 @@ static void process_tree(struct rev_info *revs,
 
        if (!revs->tree_objects)
                return;
+       if (!obj)
+               die("bad tree object");
        if (obj->flags & (UNINTERESTING | SEEN))
                return;
        if (parse_tree(tree) < 0)