bug#63271: 29.0.90; broken mouse-face

[Stephen Berman]

On Tue, 09 May 2023 23:19:35 +0000 Gregory Heytings <gregory@heytings.org> 
wrote:

>>> I finished bisection, and not sure if this helps, but that commit was
>>> 85a078e7853.
>>
>> Thanks, but I don't see how this could be true: those changes are all
>> conditioned by HAIKU-related conditionals, and I don't suppose you run a
>> Haiku build of Emacs, right?
>>
>
> Git bisect is always right.  I confirm that this bug is due to 85a078e785,
> which added, in ftcrfont_draw, a
>
> s->background_filled_p = 1;
>
> statement inside a #ifndef USE_BE_CAIRO (note the "n").  A few days later
> a1aa9cbf57 moved that statement ouside of the conditional.  Removing that
> statement fixes the bug.  I'm not sure what that statement is supposed to do
> however, it might be necessary, but only for Haiku.

I confirm that after rebuilding emacs-29 with that line commented out,
the mouse-face highlighting problems no longer occur (here under Gtk3
with Cairo).

Steve Berman