bug#57804: An infinite loop in a `fontify-region' function causes Emacs to hang indefinitely

[Eli Zaretskii]

> From: Paul Pogonyshev <pogonyshev@gmail.com>
> Date: Fri, 16 Sep 2022 12:08:49 +0200
> Cc: Gregory Heytings <gregory@heytings.org>, 57804@debbugs.gnu.org, 
>       Lars Ingebrigtsen <larsi@gnus.org>
> 
> I give up. Do as you like.

That's unfortunate, because we hope to see maintainers of 3rd-party
modes sympathetic to this effort of making Emacs capable of coping
with very long lines, and cooperate with us in adapting their modes to
the core mechanisms that deal with these situations.