bug#59141: 28.1.90; Face :extend when all the line but trailing \n is invisible

[Eli Zaretskii]

> Cc: 59141@debbugs.gnu.org,
>  Kévin Le Gouguec <kevin.legouguec@gmail.com>
> From: Ihor Radchenko <yantar92@posteo.net>
> Date: Fri, 11 Nov 2022 01:58:10 +0000
> 
> > Alternatively, maybe it would be sufficient to put the 'display "\n" 
> > property
> > only on the final newline, thus hiding its face properties.
> > The drawback is that it requires more overlays.
> 
> But don't display property inherit face? I tried to play with
> `put-text-property' 'display "\n" and even with (propertize "\n" 'face
> 'default) but :extend still appears to affect the display.

Did you read the mode "Displaying Faces" in the ELisp manual?  It
explains why this happens.

Emacs 29 has a new face attribute value 'reset'; did you try setting
the :extend attribute to the value 'reset?