bug#38035: 27.0.50; Trivial errors in process filters can render Emacs unusable

[Eli Zaretskii]

> From: Lars Ingebrigtsen <larsi@gnus.org>
> Cc: rms@gnu.org,  38035@debbugs.gnu.org
> Date: Sun, 03 Nov 2019 17:39:53 +0100
> 
> Bu I do wonder about the need for the sleep when signalling errors from
> a process filter in particular.  For instance
> 
> (run-at-time 1 1 (lambda () (error)))
> 
> doesn't pause Emacs at all, but just displays the error as normal, which
> seems, well, more normal to me.  What's so special about filter errors
> that you have to pause Emacs?

I guess the idea was to make sure the message is seen, not obscured
right away.