bug#58328: 28.2; can't select MacOS "System Font" using set-fontset-font

[Michael Norrish]

After starting with emacs -q, I paste the following into my *scratch* buffer:

;; ; superscripts and subscripts: ¹²³⁴⁵⁶⁷⁸⁹⁰ ₁₂₃₄₅₆₇₈₉₀ ₘₙₚᵣₛₜₜ
(set-fontset-font t '(#x2070 . #x209C) "System Font" nil 'prepend)

There are subscript characters in the comment line above between U+2070
and U+209C. My default font doesn't render them.  I know that MacOS's
"System Font" is capable of rendering them however. When I do C-x C-e at
the end of the set-fontset-font line, nothing changes in emacs, but I
get numerous repeated messages on the Terminal saying things like

  2022-10-06 15:53:44.239 Emacs-arm64-11[19927:6935256] CoreText note: Client 
requested name ".SFNS-UltraCompressedLightG4", it will get Times-Roman rather 
than the intended font. All system UI font access should be through proper APIs 
such as CTFontCreateUIFontForLanguage() or +[NSFont systemFontOfSize:].

--
Michael



In GNU Emacs 28.2 (build 1, aarch64-apple-darwin21.1.0, NS appkit-2113.00 
Version 12.0.1 (Build 21A559))
 of 2022-09-13 built on armbob.lan
Windowing system distributor 'Apple', version 10.3.2113
System Description:  macOS 12.6

Configured using:
 'configure --with-ns '--enable-locallisppath=/Library/Application
 Support/Emacs/${version}/site-lisp:/Library/Application
 Support/Emacs/site-lisp' --with-modules'

Configured features:
ACL GMP GNUTLS JSON LIBXML2 MODULES NOTIFY KQUEUE NS PDUMPER THREADS
TOOLKIT_SCROLL_BARS ZLIB

Important settings:
  value of $LC_CTYPE: en_AU.UTF-8
  value of $LANG: en_AU.UTF-8
  locale-coding-system: utf-8-unix

Major mode: Lisp Interaction

Minor modes in effect:
  tooltip-mode: t
  global-eldoc-mode: t
  eldoc-mode: t
  show-paren-mode: t
  electric-indent-mode: t
  mouse-wheel-mode: t
  tool-bar-mode: t
  menu-bar-mode: t
  file-name-shadow-mode: t
  global-font-lock-mode: t
  font-lock-mode: t
  blink-cursor-mode: t
  auto-composition-mode: t
  auto-encryption-mode: t
  auto-compression-mode: t
  line-number-mode: t
  indent-tabs-mode: t
  transient-mark-mode: t

Load-path shadows:
None found.

Features:
(shadow sort mail-extr emacsbug message rmc puny dired dired-loaddefs
rfc822 mml mml-sec epa derived epg rfc6068 epg-config gnus-util rmail
rmail-loaddefs auth-source cl-seq eieio eieio-core cl-macs
eieio-loaddefs password-cache json map text-property-search seq byte-opt
gv bytecomp byte-compile cconv mm-decode mm-bodies mm-encode mail-parse
rfc2231 mailabbrev gmm-utils mailheader sendmail rfc2047 rfc2045
ietf-drums mm-util mail-prsvr mail-utils time-date subr-x cl-loaddefs
cl-lib iso-transl tooltip eldoc paren electric uniquify ediff-hook
vc-hooks lisp-float-type elisp-mode mwheel term/ns-win ns-win
ucs-normalize mule-util term/common-win tool-bar dnd fontset image
regexp-opt fringe tabulated-list replace newcomment text-mode lisp-mode
prog-mode register page tab-bar menu-bar rfn-eshadow isearch easymenu
timer select scroll-bar mouse jit-lock font-lock syntax font-core
term/tty-colors frame minibuffer cl-generic cham georgian utf-8-lang
misc-lang vietnamese tibetan thai tai-viet lao korean japanese eucjp-ms
cp51932 hebrew greek romanian slovak czech european ethiopic indian
cyrillic chinese composite emoji-zwj charscript charprop case-table
epa-hook jka-cmpr-hook help simple abbrev obarray cl-preloaded nadvice
button loaddefs faces cus-face macroexp files window text-properties
overlay sha1 md5 base64 format env code-pages mule custom widget
hashtable-print-readable backquote threads kqueue cocoa ns multi-tty
make-network-process emacs)

Memory information:
((conses 16 62607 13233)
 (symbols 48 6871 1)
 (strings 32 18653 2303)
 (string-bytes 1 615224)
 (vectors 16 19400)
 (vector-slots 8 512457 57028)
 (floats 8 21 35)
 (intervals 56 219 0)
 (buffers 992 11))