bug#67568: Emacs master: Bug in byte compiler when there's an unused parameter.

[Eli Zaretskii]

> From: Stefan Monnier <monnier@iro.umontreal.ca>
> Cc: acm@muc.de,  67568-done@debbugs.gnu.org,  dmitry@gutov.dev
> Date: Sun, 03 Dec 2023 14:24:44 -0500
> 
> >> I'm wondering whether it should go to `emacs-29` or to `master`.
> >> I'm leaning toward `emacs-29` because it's rather embarrassing (and
> >> perplexing for the user) and the patch is simple.
> >> Eli?  Stefan?
> > No objections from me.
> 
> It turns out the bug is not present in `emacs-29`, it was introduced on
> master by:
> 
>     commit f616edb4ccce5b9d60e3ff42806bd2131989cd1e
>     Author: Mattias Engdegård <mattiase@acm.org>
>     Date:   Mon Sep 25 14:40:11 2023 +0200
> 
>     macroexp-parse-body: correct parsing of empty body (bug#66136)
>     
>     * lisp/emacs-lisp/macroexp.el (macroexp-parse-body):
>     Return an empty body even when there are declarations present.
>     Previously, the last declaration was considered part of the body,
>     which is only correct if the input consists of a single string.
>     
>     Reported by Jens Schmidt.
> 
> So I pushed a better fix, on master.

Great, thanks.