On 8 September 2017 at 15:01, Eli Zaretskii <eliz@gnu.org> wrote:

> > From: Elias Mårtenson <lokedhs@gmail.com>
> > Date: Fri, 8 Sep 2017 11:00:42 +0800
> >
> > As it turns out, ‘call-process’ hangs all of Emacs while the external
> program is run.
>
> No, it hangs the calling thread, and the other threads wait for the
> calling thread to yield.  To avoid that, use start-process instead.
>
> This is not a bug.
>

I'm not entirely sure why you feel that distinction is important. At the
end of the day, it's ‘start-process’ that doesn't yield while the external
process runs. Is there a reason why it can't be changed so that it does?

Regards,
Elias