bug#69431: 30.0.50; Strange fontificaion behavior

[Andrea Corallo]

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

>> I'm trying to progress on this but I've difficult time at getting a grip
>> on this bug.  One of the reason why is that on my reproducer Emacs
>> doesn't crash nor complain, the other reason is that I'm not really into
>> our fontification.  I'll keep on looking into it but I'd appretiate any
>> hint like: what should be happening to fontify the buffer that is not
>> actually happening here?  With such info I could try investingating the
>> issue from there comparing with the working case.
>
> Hmm... here, after
>
>     rm -rf ~/.emacs.d/eln-cache
>     src/emacs -Q --eval '(setq debug-on-error t)' a.org
>
> I get a buffer with no fontification, that claims to be in Org mode but
> whose `font-lock-keywords` is just (t nil), which explains the lack
> of fontification.

Where `font-lock-keywords` are supposed to be set?

Thanks

  Andrea