fast-export: ensure we traverse commits in topological order

diff --git a/http-walker.c b/http-walker.c
index 99f397e32b673e289c2f9d298b1287a97cb7a49e..9dc6b27b457a2979a95018679a0b885e6fb62d9a 100644 (file)
--- a/http-walker.c
+++ b/http-walker.c
@@ -442,6 +442,8 @@ static int setup_index(struct walker *walker, struct alt_base *repo, unsigned ch
                return -1;
 
        new_pack = parse_pack_index(sha1);
+       if (!new_pack)
+               return -1; /* parse_pack_index() already issued error message */
        new_pack->next = repo->packs;
        repo->packs = new_pack;
        return 0;
@@ -795,7 +797,7 @@ static int fetch_pack(struct walker *walker, struct alt_base *repo, unsigned cha
                lst = &((*lst)->next);
        *lst = (*lst)->next;
 
-       if (verify_pack(target, 0))
+       if (verify_pack(target))
                return -1;
        install_packed_git(target);