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From: Eli Zaretskii <eliz@gnu.org>
Newsgroups: gmane.emacs.devel
Subject: Re: master 9905001: Fix glitch uncovered by gcc -fsanitize=undefined
Date: Tue, 18 Aug 2020 08:02:07 +0300
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Cc: eggert@cs.ucla.edu, emacs-devel@gnu.org
To: Stefan Monnier <monnier@iro.umontreal.ca>
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In-Reply-To: <jwvh7t07gan.fsf-monnier+emacs@gnu.org> (message from Stefan
 Monnier on Tue, 18 Aug 2020 00:03:41 -0400)
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> From: Stefan Monnier <monnier@iro.umontreal.ca>
> Date: Tue, 18 Aug 2020 00:03:41 -0400
> Cc: Paul Eggert <eggert@cs.ucla.edu>
> 
> >     but it is safe and ccl.c is low-priority these days.
> 
> Which is a euphemism for "unused".

It is used in language/ethiopic.el (although I have no idea whether
the corresponding feature of the Ethiopic fonts is still needed).