bug#64459: 30.0.50; Edebug can't instrument certain syntax-propertize-rules forms

[Eli Zaretskii]

> From: Philipp Stephani <p.stephani2@gmail.com>
> Date: Tue, 4 Jul 2023 16:06:01 +0200
> Cc: 64459@debbugs.gnu.org
> 
> Am Di., 4. Juli 2023 um 15:42 Uhr schrieb Eli Zaretskii <eliz@gnu.org>:
> >
> > > From: Philipp Stephani <p.stephani2@gmail.com>
> > > Date: Tue, 04 Jul 2023 15:35:01 +0200
> > >
> > > This fails on master and emacs-29, but not on emacs-28, so it's a
> > > regression that I think should be fixed before releasing Emacs 29.
> >
> > The part about this not being a problem in Emacs 28 is not true: if I
> > try this in Emacs 28.2, I see in *Messages*:
> >
> >   Edebug: foo
> >   Eager macro-expansion failure: (void-function edebug-after)
> 
> Ah, indeed. So it looks like the actual change between 28 and 29 is
> that macroexpansion failures are now hard errors.
> The easiest way to fix this is to replace the first `form' in the
> edebug spec with `sexp'.

Adding Stefan.