Function logRecoverableError

packages/react-server/src/ReactFizzServer.js:1218–1243

(
  request: Request,
  error: any,
  errorInfo: ThrownInfo,
  debugTask: null | ConsoleTask,
)

}

function logRecoverableError(
  request: Request,
  error: any,
  errorInfo: ThrownInfo,
  debugTask: null | ConsoleTask,
): ?string {
  // If this callback errors, we intentionally let that error bubble up to become a fatal error
  // so that someone fixes the error reporting instead of hiding it.
  const onError = request.onError;
  const errorDigest =
    __DEV__ && debugTask
      ? debugTask.run(onError.bind(null, error, errorInfo))
      : onError(error, errorInfo);
  if (errorDigest != null && typeof errorDigest !== 'string') {
    // We used to throw here but since this gets called from a variety of unprotected places it
    // seems better to just warn and discard the returned value.
    if (__DEV__) {
      console.error(
        'onError returned something with a type other than "string". onError should return a string and may return null or undefined but must not return anything else. It received something of type "%s" instead',
        typeof errorDigest,
      );
    }
    return;
  }
  return errorDigest;
}

function fatalError(
  request: Request,