make git barf when an alias changes environment variables

diff --git a/pack-redundant.c b/pack-redundant.c
index 87077e150c1b53a26464089a2cabafafb32e6636..6bc3bdf3f4c33f369c63acf9284ce9af18286184 100644 (file)
--- a/pack-redundant.c
+++ b/pack-redundant.c
@@ -550,6 +550,9 @@ static struct pack_list * add_pack(struct packed_git *p)
        l.pack = p;
        llist_init(&l.all_objects);
 
+       if (open_pack_index(p))
+               return NULL;
+
        base = p->index_data;
        base += 256 * 4 + ((p->index_version < 2) ? 4 : 8);
        step = (p->index_version < 2) ? 24 : 20;