die("invalid shallow line: %s", line);
                        object = parse_object(sha1);
                        if (!object)
-                               die("did not find object for %s", line);
+                               continue;
                        if (object->type != OBJ_COMMIT)
                                die("invalid shallow object %s", sha1_to_hex(sha1));
                        if (!(object->flags & CLIENT_SHALLOW)) {