bug#70368: [PATCH] Use a dedicated type to represent interpreted-function values

[Michael Heerdegen via "Bug reports for GNU Emacs, the Swiss army knife of text editors" <bug-gnu-emacs@gnu.org>]

Stefan Monnier <monnier@iro.umontreal.ca> writes:

> The patch changed `edebug.el` only in the following way:
>
>             (when (and skip-next-lambda
>     -                  (not (memq (car-safe fun) '(closure lambda))))
>     +                  (not (interpreted-function-p fun)))
>               (warn "Edebug--strip-instrumentation expected an interpreted function:\n%S" fun))
>
> so AFAICT the old code would have burped on `apply` just as well.
>
> And I don't get such a warning on my attempts to use
> `edebug-pop-to-backtrace`.

Hmm - I don't get them with emacs -Q either.  Will have to have a second
look what makes the difference.

Thanks so far,

Michael.