got you.
My macro should have been


(defmacro mac()
  `(progn
     (message "%S" ,ii)
     (sit-for 0.1)))

So, the original macro had a brain-fart basically amounted to returning nil
unconditionally.
In that case, why were we getting that strange error?



On Sun, Nov 5, 2023 at 1:04 AM Gerd Möllmann <gerd.moellmann@gmail.com>
wrote:

> Dave Goel <deego3@gmail.com> writes:
>
> > On Sun, Nov 5, 2023 at 12:06 AM Dave Goel <deego3@gmail.com> wrote:
> >
> >> (progn
> >>   (setq lexical-binding nil)
> >>
> >>   (dotimes (ii 10)
> >>     (defmacro mac ()
> >>       `(message "%S" ,ii)
> >>       (sit-for 0.1))
>
> The macro expansion of mac is what it returns, which is what sit-for
> returns...
>