bug#58396: 29.0.50; Optimization failure for add-to-list

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

> What about naming it `macroexp-inhibit-compiler-macros´?

Perfect!

> I also wanted to ask whether to extend that approach to the other advice
> installed in `elisp--local-variables´

That would be nice, but...

> but then noticed that `macroexpand´ is actually a built-in.

`elisp--local-variables´ doesn't use that built-in any more, it uses
`macroexpand-1` instead, which is implemented in `macroexp.el` :-)

But the problem is that the advice wraps the call within
a `condition-case` and that's inconvenient to do in a way which
doesn't interfere too much with "normal use" (e.g. doesn't hide/catch
errors when we don't want to, and doesn't impose too much of
a performance cost either).

Then again, maybe I'm worrying about nothing.


        Stefan