Subject: bug#46573: 28.0.50; Error when edebugging setting unbound place

From: Eli Zaretskii <[email-masked]>
Date: Wed, 17 Feb 2021 17:29:35 +0200

> From: Lars Ingebrigtsen <[email-masked]>
> Date: Wed, 17 Feb 2021 00:21:17 +0100
> Cc: Michael Heerdegen <[email-masked]>, [email-masked]
> 
> I checked older Emacs versions -- (setf foo 'bar) works in Emacs 26.1,
> but not in Emacs 27.1.

Then we should try fixing it in Emacs 27.2, if that's possible without
risky changes.