bug#36288: 27.0.50; Cannot use menu-set-font

[Robert Pluim]

>>>>> On Thu, 20 Jun 2019 09:51:19 +0200, Robert Pluim <rpluim@gmail.com> said:

>>>>> On Thu, 20 Jun 2019 11:54:21 +0900, YAMAMOTO Mitsuharu 
>>>>> <mituharu@math.s.chiba-u.ac.jp> said:
    >>> Maybe better to use the first entry of the font-backend frame
    >>> parameter rather than hardcoded one?

    Robert> Thanks, that works for me. Iʼve not tested what happens if I try to
    Robert> use an X font rather than an xft one, but I think that usage will
    Robert> eventually go away anyway.

I tried a different variant:

(add-to-list 'default-frame-alist '(font-backend x xfthb))

then M-x menu-set-font

which gives (with your patch):

set-face-attribute: Font not available: #<font-spec x nil Ubuntu\ Mono nil nil 
normal normal nil 1.0 nil nil nil ((:name . "Ubuntu Mono"))>

Robert