If the .listen() hasn't been called on the server, there is no handle
object. In this case use null as the triggerAsyncId.
Fixes: https://github.com/nodejs/node/issues/13548
PR-URL: https://github.com/nodejs/node/pull/13938
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Refael Ackermann <refack@gmail.com>
Reviewed-By: Trevor Norris <trev.norris@gmail.com>
Reviewed-By: Andreas Madsen <amwebdk@gmail.com>
