Re: master 7362554: Widen around c-font-lock-fontify-region. This fixes bug #38049.

[Stefan Monnier]

>  ;; Return number of screen lines between START and END.
>  (defun repos-count-screen-lines (start end)
> +  ;; Make sure jit-lock doesn't have to run in a narrowed context.
> +  (font-lock-ensure start end)
>    (save-excursion
>      (save-restriction
>        (narrow-to-region start end)

Hmm... the buffer might have font-lock disabled, in which case we'd
be fontifying where the user didn't want fontification.

But I haven't followed the thread enough to know what we're talking
about, really.  E.g. I have no idea what's the connection between
CC-mode, font-lock-dont-widen, and the above hunk.  More specifically,
when looking at the above patch my first reaction is "if it's needed
here, why isn't it needed almost everywhere else as well?"


        Stefan