Re: Default lexical-binding to t

[Eli Zaretskii <eliz@gnu.org>]

> From: Richard Stallman <rms@gnu.org>
> Cc: emacs-devel@gnu.org
> Date: Mon, 04 Nov 2024 00:34:25 -0500
> 
> For now, we should improve the warning given for a file that fails to
> specify lexical-binding.  Let's make it explicitly say what we want
> users to do.  "To avoid confusion later, add lexical-binding to the
> file's local variables now."

If we urge people to specify lexical-binding in their files, then what
is the point of making lexical-binding the default?

> For warning when visiting a file, instead of a cryptic "/d", it whould
> show clear instructions.
> 
> Can we add that trivial change to 31.2?

You mean, 31.1, I guess?

> The more cases in which we notify users, and the more explicitly we do
> so, the sooner users will follow that advice.  With this
> encouragement, I think we can expect that few programs that don't
> specify lexical-binding will remain after a few more years.

What bothers me is how do I know whether a given Lisp file of mine
will have problems under lexical-binding.  Do we have any tools which
will help me determine that?