Subject: Re: bug#56637: 28.1.90; [FR] Allow a way around font-lock-mode being unconditionally disabled in " *hidden*" buffers

From: Stefan Monnier <[email-masked]>
Date: Tue, 19 Jul 2022 12:13:29 -0400

> Org mode fontifies code blocks using "hidden" temporary buffers with
> their name starting from " ": " *org-src-fontification:major-mode*".
>
> The buffers are kept around to avoid extra major-mode loading overheads
> and the fontification is not using (font-lock-ensure).

IIUC they're never displayed, right?  So, `font-lock-ensure` does sound
like "the right tool".  Could you give a short explanation for why you
don't use `font-lock-ensure`?

> (font-lock-ensure) usually fontifies the buffer correctly even though
> font-lock-mode is disabled. However, not always.

Sounds like a bug we should fix.

> It would be nice if we could somehow enable font-lock inside " *hidden*"
> buffers.  Would it be possible?

FWIW, I do think it would be good to remove the rule that font-lock is
never enabled in temp buffers.

        Stefan