bug#49797: 28.0.50; Setting face to custom fontset doesn't work

[Fu Yuan]

> 在 2021年8月2日，上午7:57，handa <handa@gnu.org> 写道：
> 
> 
>> 
>>> From: Yuan Fu <casouri@gmail.com>
>>> Date: Sat, 31 Jul 2021 17:37:05 -0400
>>> 
>>> If I evaluate the following:
>>> 
>>> (progn
>>>  (create-fontset-from-fontset-spec
>>>   (font-xlfd-name
>>>    (font-spec :registry "fontset-lunamono")))
>>>  (set-fontset-font "fontset-lunamono" 'latin (font-spec :family "SF Mono"))
>>>  (set-face-attribute 'default nil :fontset "fontset-lunamono”))
>>> 
>>> I expect Latin characters to be shown in SF Mono font, but that’s not what 
>>> happened. If I instead set font for the default fontset, the characters in 
>>> the buffer are correctly displayed in SF Mono font. I tried this code 
>>> snippet with Emacs 26, 27 and 28, and all of them have this problem.
>>> 
> 
> Please try (set-face-attribute 'default nil :font "fontset-lunamono").
> 

Sorry for the confusion. I actually tried both :font and :fontset,  but neither 
works.

Yuan