bug#13423: 24.1; Can't display (some) characters outside BMP

[Michael Norrish]

This bug report will be sent to the Bug-GNU-Emacs mailing list
and the GNU bug tracker at debbugs.gnu.org.  Please check that
the From: line contains a valid email address.  After a delay of up
to one day, you should receive an acknowledgement at that address.

Please write in English if possible, as the Emacs maintainers
usually do not have translators for other languages.

Please describe exactly what actions triggered the bug, and
the precise symptoms of the bug.  If you can, give a recipe
starting from `emacs -Q':

The following text (featuring character U+1D54C), doesn't display the
SMP char

  ``𝕌(:num) ≼ 𝕌(:'a ucinf)``,

even after doing

  (set-fontset-font t 'unicode-smp "STIXGeneral")

The character viewer on the Mac confirms that this font is in the system
and has a glyph for that character code.

If Emacs crashed, and you have the Emacs process in the gdb debugger,
please include the output from the following gdb commands:
    `bt full' and `xbacktrace'.
For information about debugging Emacs, please read the file
/Applications/Emacs.app/Contents/Resources/etc/DEBUG.


In GNU Emacs 24.1.1 (x86_64-apple-darwin, NS apple-appkit-1038.36)
 of 2012-06-11 on bob.porkrind.org
Windowing system distributor `Apple', version 10.3.1187
Configured using:
 `configure '--host=x86_64-apple-darwin' '--build=i686-apple-darwin'
 '--with-ns' 'build_alias=i686-apple-darwin'
 'host_alias=x86_64-apple-darwin' 'CC=gcc -mmacosx-version-min=10.5''

Important settings:
  value of $LC_ALL: nil
  value of $LC_COLLATE: nil
  value of $LC_CTYPE: en_AU.UTF-8
  value of $LC_MESSAGES: nil
  value of $LC_MONETARY: nil
  value of $LC_NUMERIC: nil
  value of $LC_TIME: nil
  value of $LANG: en_AU.UTF-8
  value of $XMODIFIERS: nil
  locale-coding-system: utf-8-unix
  default enable-multibyte-characters: t

Major mode: Lisp Interaction

Minor modes in effect:
  tooltip-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
  transient-mark-mode: t

Recent input:
<backspace> <backspace> i c o d e - s m p SPC " S T
I X G E <backspace> e n e r a l " ) C-x C-e <return>
<return> ( s e t - f o n t s e t - f o n t SPC t SPC
' u n i c o d e SPC " A n d a l e SPC M o n o C-p C-p
s-b s-b M-b C-b ( C-e C-b SPC . SPC " i s o 1 0 6 4
6 - 1 " ) C-e C-x C-e q M-b M-b M-b M-b C-f C-f C-f
C-f ' C-e C-x C-e <return> C-y C-n C-n C-e " ) C-x
C-e s-b s-b C-g M-b M-b M-d M-d A p p l e SPC S y m
b o l s C-e C-x C-e <return> ( s e t - f o n t - s
<backspace> <backspace> s e t - f o n t SPC t SPC '
( # x 3 7 9 SPC . SPC # x 3 F 0 ) SPC " A n d a l e
SPC M o n o " ) C-x C-e <up> <up> <up> <up> <up> M-b
M-b M-f M-f M-b C-b M-b M-b M-f M-d C-f C-d C-d M-f
C-f C-k ) C-x C-e C-n C-n C-n C-n C-e C-x C-e C-n C-e
C-x C-e <left> <left> - 1 2 C-e C-x C-e C-b C-b <backspace>
4 C-e C-x C-e C-b C-b <backspace> 6 C-e C-x C-e s-x
C-/ M-x e m a <tab> u <tab> <backspace> <backspace>
<backspace> <backspace> <backspace> <backspace> b u
g <tab> - <backspace> <backspace> <backspace> <backspace>
<backspace> <backspace> <backspace> <backspace> <backspace>
<backspace> r e p o <tab> r t <tab> <return>

Recent messages:
nil
Entering debugger...
Back to top level.
nil
Mark set
nil
Quit
nil [8 times]
Undo!
Making completion list...

Load-path shadows:
None found.

Features:
(shadow sort gnus-util mail-extr emacsbug message format-spec rfc822 mml
mml-sec mm-decode mm-bodies mm-encode mail-parse rfc2231 mailabbrev
gmm-utils mailheader sendmail regexp-opt rfc2047 rfc2045 ietf-drums
mm-util mail-prsvr mail-utils help-mode easymenu view debug time-date
tooltip ediff-hook vc-hooks lisp-float-type mwheel ns-win tool-bar dnd
fontset image fringe lisp-mode register page menu-bar rfn-eshadow timer
select scroll-bar mouse jit-lock font-lock syntax facemenu font-core
frame cham georgian utf-8-lang misc-lang vietnamese tibetan thai
tai-viet lao korean japanese hebrew greek romanian slovak czech european
ethiopic indian cyrillic chinese case-table epa-hook jka-cmpr-hook help
simple abbrev minibuffer loaddefs button faces cus-face files
text-properties overlay sha1 md5 base64 format env code-pages mule
custom widget hashtable-print-readable backquote make-network-process ns
multi-tty emacs)