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...