Function error

packages/react-server/src/ReactFlightServer.js:1155–1165

(reason: mixed)

    }
  }
  function error(reason: mixed) {
    if (streamTask.status !== PENDING) {
      return;
    }
    request.cacheController.signal.removeEventListener('abort', abortStream);
    erroredTask(request, streamTask, reason);
    enqueueFlush(request);

    // $FlowFixMe should be able to pass mixed
    reader.cancel(reason).then(error, error);
  }
  function abortStream() {
    if (streamTask.status !== PENDING) {
      return;