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

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From: Lars Ingebrigtsen <larsi <at> gnus.org>
To: Eli Zaretskii <eliz <at> gnu.org>
Cc: 57804 <at> debbugs.gnu.org, pogonyshev <at> gmail.com
Subject: bug#57804: An infinite loop in a `fontify-region' function causes Emacs to hang indefinitely
Date: Wed, 14 Sep 2022 19:45:18 +0200

Eli Zaretskii <eliz <at> gnu.org> writes:

>> A single `C-g' wouldn't be quite the right thing, because the user may
>> hit `C-g' by accident while font-lock happens to run (and it's not
>> hanging), which is why I though a special key sequence like `C-g C-g
>> C-g' might make sense.
>
> I frequently find myself hitting C-g several times for reasons
> unrelated to any infloop.

But like I said, three `C-g's without any idle time in between would be
the magical command to switch off font locking.  I think that's hard to
do accidentally in normal circumstances.

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