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From: Eli Zaretskii <eliz@gnu.org>
Newsgroups: gmane.emacs.devel
Subject: Re: Edebug corrupting point in buffers; we need buffer-point and
 set-buffer-point, perhaps.
Date: Mon, 31 Oct 2022 20:10:43 +0200
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To: Stefan Monnier <monnier@iro.umontreal.ca>
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> From: Stefan Monnier <monnier@iro.umontreal.ca>
> Cc: emacs-devel@gnu.org
> Date: Mon, 31 Oct 2022 13:21:57 -0400
> 
> Maybe we should try and make sure redisplay itself (rather than, or
> in addition, I'm not sure) preserves buffer points?

We do try and make sure it does.  There are quite a few places in the
code where we jump through many hoops to make sure this is true.