bug#56818: 28.1; c-mode font-lock issues in Emacs 28

[Eli Zaretskii]

> Date: Fri, 29 Jul 2022 17:44:58 +0000
> Cc: 56818@debbugs.gnu.org
> From: Alan Mackenzie <acm@muc.de>
> 
> diff -r 9c649274b259 cc-engine.el
> --- a/cc-engine.el    Tue Jul 26 20:08:39 2022 +0000
> +++ b/cc-engine.el    Fri Jul 29 17:25:16 2022 +0000
> @@ -1679,9 +1679,13 @@
>  Return the result of `forward-comment' if it gets called, nil otherwise."
>    `(if (not comment-end-can-be-escaped)
>         (forward-comment -1)
> -     (when (and (< (skip-syntax-backward " >") 0)
> -             (eq (char-after) ?\n))
> -       (forward-char))
> +     (let ((dist (skip-syntax-backward " >")))
> +       (when (and
> +           (< dist 0)
> +           (progn
> +             (skip-syntax-forward " " (- (point) dist 1))
> +             (eq (char-after) ?\n)))
> +      (forward-char)))
>       (cond
>        ((and (eq (char-before) ?\n)
>           (eq (char-before (1- (point))) ?\\))
> 
> 
> 
> 
> > Alan, this seems to be a regression in Emacs 28, so could you please
> > look into it?
> 
> Eli, Do I understand you want the fix in the release branch?

Yes, please.