nvoked in an a-sync or compose-a-sync block in order to
bring the event loop to an end, and (iii) before invoking this
procedure the a-sync or compose-a-sync block has done nothing except
make a call to one or more of those particular await-* procedures,
then in order to make sure the loop is running consider calling
await-yield! or some similar procedure before applying this procedure.
</p>
<p>Note that the discarding of file watches, timeouts and unexecuted
events remaining in the event loop means that if