Subject: bug#59347: 29.0.50; `:family` face setting ignored

From: Gregory Heytings <[email-masked]>
Date: Tue, 22 Nov 2022 12:43:15 +0000

>> emacs -Q M-: (fancy-startup-screen) RET
>>
>> and now evaluate the following lines in turn:
>>
>> (set-face-attribute 'default nil :font "Source Code Pro" :weight 'ultra-heavy) ;; 1
>> (set-face-attribute 'default nil :font "Source Code Pro" :weight 'heavy) ;; 2
>> (set-face-attribute 'default nil :font "Source Code Pro" :weight 'ultra-bold) ;; 3
>> (set-face-attribute 'default nil :font "Source Code Pro" :weight 'bold) ;; 4
>> (set-face-attribute 'default nil :font "Source Code Pro" :weight 'semi-bold) ;; 5
>> (set-face-attribute 'default nil :font "Source Code Pro" :weight 'medium) ;; 6
>> (set-face-attribute 'default nil :font "Source Code Pro" :weight 'normal) ;; 7
>> (set-face-attribute 'default nil :font "Source Code Pro" :weight 'semi-light) ;; 8
>> (set-face-attribute 'default nil :font "Source Code Pro" :weight 'light) ;; 9
>> (set-face-attribute 'default nil :font "Source Code Pro" :weight 'ultra-light) ;; 10
>> (set-face-attribute 'default nil :font "Source Code Pro" :weight 'thin) ;; 11
>>
>> (If you don't have the Source Code Pro font on your system, I'm sure 
>> you can find another font with more weight variants with which you will 
>> observe a similar effect.)
>>
>> With current master, the variable-pitch face is realized as follows:
>                           ^^^^^^^^^^^^^^
>
> Is that a typo?  If not, how does variable-pitch face come into play 
> here: you only asked for a font for the default face.
>

No, it's not a typo.  See line 2 of the recipe above, which opens the 
fancy-startup-screen, which uses the variable-pitch face (and other faces 
that inherit from variable-pitch).  With that you see the effect of 
changing the default face on the variable-pitch face.