Re: [PATCH] Remove obsolete fast-lock and lazy-lock libraries

[Eli Zaretskii]

> From: Stefan Monnier <monnier@iro.umontreal.ca>
> Cc: stefankangas@gmail.com,  jnorden@tntech.edu,  emacs-devel@gnu.org
> Date: Mon, 10 Aug 2020 18:25:54 -0400
> 
> That's why I'm suggesting a `font-lock-debug-mode` instead.
> 
> > Do you see any harm in keeping it as a defcustom?
> 
> If we add `font-lock-debug-mode` I don't see any benefit in keeping it.
> The harm is limited to accumulating cruft.

If you are saying that we should make a single change which introduces
font-lock-debug-mode and makes font-lock-support-mode a defvar, then I
agree.  I thought you were advocating to make only the latter change,
and then consider the former at some future time.