bug#42539: 28.0.50 font face in mode line problem ?

[Fabrice Popineau]

Ok, I think I was fooled by something.

Trying to run `emacs -q -l test1.el' with test1.el:

------------------------------------------------------------

(setq use-default-font-for-symbols nil)
(set-face-font 'default "Roboto Mono Light 14")
(set-fontset-font "fontset-default"  '(#x2600 . #x26ff) "Fira Code 16")
(setq-default mode-line-format '("☰ %b"))
(split-window-vertically)

------------------------------------------------------------

I got the following screen:

But it seems that it is not the same font that is used for both modelines. 

I would have expected that it was the same.

The font used is switched if I switch windows (C-x o)

So probably I miss something here and there is no bug at all. 

Fabrice

Le dim. 26 juil. 2020 à 20:57, Eli Zaretskii <eliz@gnu.org> a écrit :

> From: Fabrice Popineau <fabrice.popineau@gmail.com>
> Date: Sun, 26 Jul 2020 19:58:00 +0200
> Cc: 42539@debbugs.gnu.org
>
>  Does it help to give the nil value to use-default-font-for-symbols?
>
> Unfortunately, it does not change the behaviour.

You mean, it doesn't cause Emacs to obey set-fontset-font setting?  If
so, I don't know what's wrong; most probably there's something in this
complicated setup you didn't show, or maybe something that you did
show has some strange effect that I cannot spot.

In general, the character you tried to display belongs to the symbol
block, and Emacs by default uses the default face's font to display
it.  Setting use-default-font-for-symbols to nil disables that, and
Emacs should obey set-fontset-font.  That's all I know.