message: Fix for mac build break.
diff: @@ -776,7 +776,9 @@ PyLocalBuffer::CopyToDeviceHelper(
  return copy_event_or.status();
  }
  - return std::pair(std::move(py_buffer), copy_event_or.ConsumeValueOrDie());
  + return std::pair<std::unique_ptr<PyLocalBuffer>,
  + std::shared_ptr<BufferDefinitionEvent>>(
  + std::move(py_buffer), copy_event_or.ConsumeValueOrDie());
  }
  StatusOr<std::unique_ptr<PyLocalBuffer>> PyLocalBuffer::CopyToDevice(
  