message: [Grappler:LayoutOptimizer] Initialize fanin shape with unknown rank
diff: @@ -443,6 +443,7 @@ Status Transposer::UpdateEdge(
  string added_node_name;
  if (op == kOpTranspose) {
  TensorShapeProto input_shape_proto;
  + input_shape_proto.set_unknown_rank(true);
  if (input_shape != nullptr) {
  input_shape_proto = input_shape->list().shape(src_port);
  } else {
  