Re: master 64f2c96 2/2: Make a process test faster.

[Eli Zaretskii]

> From: Philipp Stephani <p.stephani2@gmail.com>
> Date: Sat, 9 Jan 2021 22:00:45 +0100
> Cc: Philipp Stephani <phst@google.com>, Emacs developers <emacs-devel@gnu.org>
> 2. The other one happens if SIGCHLD is signaled during
> wait_reading_process_output. Then wait_reading_process_output will
> wait forever, since the stdout FD never gets closed and it doesn't see
> the process status update in time.

Do you mean that wait_reading_process_output has this problem in
general, or just in this particular scenario?  If the former, I'm
surprised, as we are using this code for a very long time.  If the
latter, can you elaborate on the situation, and what does SIGCHLD have
to do with closing stdout?