message: Add missing out_iterator argument
diff: @@ -450,7 +450,7 @@ Status MakeIteratorFromInputElement(
  std::unique_ptr<IteratorBase>* out_iterator) {
  return MakeIteratorFromInputElement(
  ctx, parent, input_element, thread_index, inst_captured_func, prefix,
  - /*node=*/nullptr);
  + out_iterator, /*node=*/nullptr);
  }
  Status MakeIteratorFromInputElement(
  