bug#53866: face-attribute giving bold for ultra-bold attribute

[Eli Zaretskii <eliz@gnu.org>]

> Cc: larsi@gnus.org, 53866@debbugs.gnu.org
> Date: Tue, 08 Feb 2022 17:00:38 +0000
> From:  goncholden via "Bug reports for GNU Emacs,
>  the Swiss army knife of text editors" <bug-gnu-emacs@gnu.org>
> 
> It is very confusing.  I loaded a random elisp file and run the command in the middle of the buffer
> to get
> 
> ---------
> 
> Type C-x 1 to delete the help window, C-M-v to scroll help.
> Char: C-j (10, #o12, #xa) point=11866 of 22678 (52%) column=0
> End of buffer
> 
>              position: 11866 of 22678 (52%), column: 0
>             character: C-j (displayed as C-j) (codepoint 10, #o12, #xa)
>               charset: ascii (ASCII (ISO646 IRV))
> code point in charset: 0x0A
>                script: latin
>                syntax: > 	which means: endcomment
>              to input: type "C-x 8 RET a" or "C-x 8 RET LINE FEED (LF)"
>           buffer code: #x0A
>             file code: #x0A (encoded by coding system prefer-utf-8-unix)
>               display: no font available

Put the cursor on a character that has a visible glyph.  You have put
it on a newline, which leaves no trace on display, so you get "no
font" for that.