add_object_array(e->item, e->name, &refs);
        }
 
-       prepare_revision_walk(&revs);
+       if (prepare_revision_walk(&revs))
+               die("revision walk setup failed");
 
        i = req_nr;
        while (i && (commit = get_revision(&revs)))
                write_or_die(rls.in, sha1_to_hex(object->sha1), 40);
                write_or_die(rls.in, "\n", 1);
        }
+       close(rls.in);
        if (finish_command(&rls))
                return error ("pack-objects died");
-
-       return bundle_to_stdout ? close(bundle_fd) : commit_lock_file(&lock);
+       if (!bundle_to_stdout)
+               commit_lock_file(&lock);
+       return 0;
 }
 
 int unbundle(struct bundle_header *header, int bundle_fd)