Thanks for spotting this.  Yes you are right.  My local branch
was very different from the one on ELPA and it did not use
nadvice package.  Recently I merged ELPA version back and the
code segment you highlighted was quite old and I don't even
remember what it's for, probably a transition code during the
period of transition from `xxx' to `cl-xxx' ...

I've fixed it along with an issue found on the Windows version
-- I just found that the Windows version is a convenient tool to
help me test old Emacs versions like Emacs 24.2.
Thanks.




On Mon, 30 Jan 2023 at 11:01, Stefan Monnier <monnier@iro.umontreal.ca>
wrote:

> [ Resending with a better email address.  ]
>
> >  (eval-when-compile
> > -  (require 'cl-lib)
> > +  (if (version< emacs-version "27.0")
> > +      (progn
> > +        (require 'cl) ;; Package cl is deprecated for Emacs27+
> > +        (require 'cl-macs))
> > +    (require 'cl-lib))
>
> This looks like a regression resulting from a misunderstanding.
> What are you trying to do here?
>
> The rest of the code uses only `cl-lib` functionality, so (require 'cl)
> will be useful only if it internally does (require 'cl-lib).
> In Emacs<24.3, this will fail because (require 'cl) will not define the
> macros that the rest of the code needs (e.g. `cl-eval-when`, `cl-loop`,
> ...).
>
>
>         Stefan
>
>

-- 
Best regards,
Luke Lee