bug#57534: 29.0.50; Highlighting lost after auto-revert-mode triggers

[Eli Zaretskii]

> From: Juri Linkov <juri@linkov.net>
> Cc: Dima Kogan <dima@secretsauce.net>,  57534@debbugs.gnu.org
> Date: Fri, 02 Sep 2022 10:04:25 +0300
> 
> >> 3. (highlight-lines-matching-regexp "3")
> >>
> >>    This is bound to "M-s h l". I see the line containing "3" highlighted
> >>    in yellow, as expected
> >>
> >> 4. M-x auto-revert-mode
> >
> > If I use your recipe in a file visited with C Mode, which does use
> > Font Lock, the auto-revert doesn't lose the highlighted lines.
> 
> However, after manual revert with 'C-x x g' highlighting is still lost.

That's not the same revert as in auto-revert-mode.

> But this is bug#50431 where 'C-x x g' should be fixed to restore minor modes.

I'm not sure this is one of the minor modes to be restored.  Maybe
optionally, but not unconditionally.  See the discussion in that bug.