bug#59861: 27.1; seg fault using utf8 char in text

bug#59861: 27.1; seg fault using utf8 char in text

[Markus von der Heyde]

[-- Attachment #1: Type: text/plain, Size: 4624 bytes --]

--text follows this line--

When using emacs with X, it crashes when it should display the utf8 char: ∗
In terminal mode, no crash appears.

Just generate a file with this utf8 char in it and make emacs display it 
in the normal view.
As long as the char is not visible, the emacs is fine.

Please generate your own debugging log. The debian version seems not to 
contain any useful debug symbols...


---
hexdump crash.txt
0000000 88e2 0a97
0000004

---



In GNU Emacs 27.1 (build 1, x86_64-pc-linux-gnu, GTK+ Version 3.24.30, 
cairo version 1.16.0)
  of 2022-01-24, modified by Debian built on lgw01-amd64-048
System Description: Ubuntu 22.04.1 LTS

Recent messages:
For information about GNU Emacs and the GNU system, type C-h C-a.
Mark set
Making completion list...

Configured using:
  'configure --build x86_64-linux-gnu --prefix=/usr
  --sharedstatedir=/var/lib --libexecdir=/usr/lib
  --localstatedir=/var/lib --infodir=/usr/share/info
  --mandir=/usr/share/man --enable-libsystemd --with-pop=yes
  --enable-locallisppath=/etc/emacs:/usr/local/share/emacs/27.1/site-lisp:/usr/local/share/emacs/site-lisp:/usr/share/emacs/27.1/site-lisp:/usr/share/emacs/site-lisp
  --with-sound=alsa --without-gconf --with-mailutils --build
  x86_64-linux-gnu --prefix=/usr --sharedstatedir=/var/lib
  --libexecdir=/usr/lib --localstatedir=/var/lib
  --infodir=/usr/share/info --mandir=/usr/share/man --enable-libsystemd
  --with-pop=yes
  --enable-locallisppath=/etc/emacs:/usr/local/share/emacs/27.1/site-lisp:/usr/local/share/emacs/site-lisp:/usr/share/emacs/27.1/site-lisp:/usr/share/emacs/site-lisp
  --with-sound=alsa --without-gconf --with-mailutils --with-cairo
  --with-x=yes --with-x-toolkit=gtk3 --with-toolkit-scroll-bars
  'CFLAGS=-g -O2
  -ffile-prefix-map=/build/emacs-NbbgEv/emacs-27.1+1=. 
-fstack-protector-strong
  -Wformat -Werror=format-security -Wall' 'CPPFLAGS=-Wdate-time
  -D_FORTIFY_SOURCE=2' 'LDFLAGS=-Wl,-Bsymbolic-functions -Wl,-z,relro''

Configured features:
XPM JPEG TIFF GIF PNG RSVG CAIRO SOUND GPM DBUS GSETTINGS GLIB NOTIFY
INOTIFY ACL LIBSELINUX GNUTLS LIBXML2 FREETYPE HARFBUZZ M17N_FLT LIBOTF
ZLIB TOOLKIT_SCROLL_BARS GTK3 X11 XDBE XIM MODULES THREADS LIBSYSTEMD
JSON PDUMPER LCMS2 GMP

Important settings:
   value of $LC_MONETARY: de_DE.UTF-8
   value of $LC_NUMERIC: de_DE.UTF-8
   value of $LC_TIME: de_DE.UTF-8
   value of $LANG: en_US.UTF-8
   value of $XMODIFIERS: @im=ibus
   locale-coding-system: utf-8-unix

Major mode: Text

Minor modes in effect:
   tooltip-mode: t
   global-eldoc-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
   auto-composition-mode: t
   auto-encryption-mode: t
   auto-compression-mode: t
   line-number-mode: t
   transient-mark-mode: t

Load-path shadows:
None found.

Features:
(shadow sort mail-extr emacsbug message rmc puny dired dired-loaddefs
format-spec rfc822 mml easymenu mml-sec password-cache epa derived epg
epg-config gnus-util rmail rmail-loaddefs text-property-search time-date
subr-x seq mm-decode mm-bodies mm-encode mail-parse rfc2231 mailabbrev
gmm-utils mailheader cl-loaddefs cl-lib sendmail rfc2047 rfc2045
ietf-drums mm-util mail-prsvr mail-utils term/xterm xterm byte-opt gv
bytecomp byte-compile cconv tooltip eldoc electric uniquify ediff-hook
vc-hooks lisp-float-type mwheel term/x-win x-win term/common-win x-dnd
tool-bar dnd fontset image regexp-opt fringe tabulated-list replace
newcomment text-mode elisp-mode lisp-mode prog-mode register page
tab-bar menu-bar rfn-eshadow isearch timer select scroll-bar mouse
jit-lock font-lock syntax facemenu 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 charscript charprop case-table epa-hook jka-cmpr-hook help
simple abbrev obarray cl-preloaded nadvice loaddefs button faces
cus-face macroexp files text-properties overlay sha1 md5 base64 format
env code-pages mule custom widget hashtable-print-readable backquote
threads dbusbind inotify lcms2 dynamic-setting system-font-setting
font-render-setting cairo move-toolbar gtk x-toolkit x multi-tty
make-network-process emacs)

Memory information:
((conses 16 49893 8601)
  (symbols 48 6119 1)
  (strings 32 15732 2062)
  (string-bytes 1 504569)
  (vectors 16 8080)
  (vector-slots 8 83300 7198)
  (floats 8 23 356)
  (intervals 56 250 0)
  (buffers 1000 13))

[-- Attachment #2: crash.txt --]
[-- Type: text/plain, Size: 4 bytes --]

∗

bug#59861: 27.1; seg fault using utf8 char in text

[Eli Zaretskii]

> Date: Tue, 6 Dec 2022 16:34:18 +0100
> From: Markus von der Heyde <markus.von.der.heyde@gmail.com>
> 
> When using emacs with X, it crashes when it should display the utf8 char: ∗
> In terminal mode, no crash appears.

No crash here, neither in Emacs 27.1 nor in the what will soon be Emacs 29.

bug#59861: 27.1; seg fault using utf8 char in text

[Eli Zaretskii]

[Please use Reply All to reply, so that the bug tracker is CC'ed.]

> Date: Tue, 6 Dec 2022 20:00:17 +0100
> From: Markus von der Heyde <markus.von.der.heyde@gmail.com>
> 
> No crash here, neither in Emacs 27.1 nor in the what will soon be Emacs 29.
> 
> Hi Eli,
> 
> have you tried to load the attached <crash.txt> file or just typed an "*" aka ASCII42?

I visited the file you attached.

> The star (∗) was some utf8 char (!= *). I have no quick way to name the actual utf-8 code... sorry.

It's U+2217.

Did you try using a different font, or forcing a non-default font backend?

And which version of HarfBuzz do you have installed?

bug#59861: 27.1; seg fault using utf8 char in text

[Stefan Kangas]

Eli Zaretskii <eliz@gnu.org> writes:

> [Please use Reply All to reply, so that the bug tracker is CC'ed.]
>
>> Date: Tue, 6 Dec 2022 20:00:17 +0100
>> From: Markus von der Heyde <markus.von.der.heyde@gmail.com>
>>
>> No crash here, neither in Emacs 27.1 nor in the what will soon be Emacs 29.
>>
>> Hi Eli,
>>
>> have you tried to load the attached <crash.txt> file or just typed an "*" aka ASCII42?
>
> I visited the file you attached.
>
>> The star (∗) was some utf8 char (!= *). I have no quick way to name the actual utf-8 code... sorry.
>
> It's U+2217.
>
> Did you try using a different font, or forcing a non-default font backend?
>
> And which version of HarfBuzz do you have installed?

More information was requested, but none was given within 9 months, so
I'm closing this bug.  If this is still an issue, please reply to this
email (use "Reply to all" in your email client) and we can reopen the
bug report.