GNU bug report logs - #31316
Emacs hangs in `font_open_entity'

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Message #5 received at submit <at> debbugs.gnu.org (full text, mbox):

From: Werner LEMBERG <wl <at> gnu.org>
To: bug-gnu-emacs <at> gnu.org
Subject: Emacs hangs in `font_open_entity'
Date: Mon, 30 Apr 2018 10:13:08 +0200 (CEST)

If I call `emacs -Q' and load the attached file `testchar' with

  C-x RET c gb18030 C-x C-f testchar

Emacs hangs in `font_open_entity' on my GNU/Linux box:

  for (psize = pixel_size; ; psize++)
    {
      font_object = driver_list->driver->open (f, entity, psize);
      if (NILP (font_object))
        return Qnil;
      font = XFONT_OBJECT (font_object);
      if (font->average_width > 0 && font->height > 0)
        break;
    }

Both `average_width' and `height' are always zero for `font'
regardless of `psize'; this effectively makes the above code an
endless loop.



In GNU Emacs 27.0.50 (build 1, x86_64-pc-linux-gnu, GTK+ Version 3.20.10)
 of 2018-04-30 built on linux
Repository revision: bca6c4348077c8c0b368503b16378867b6d49659
Windowing system distributor 'The X.Org Foundation', version 11.0.11803000
System Description: openSUSE Leap 42.3

Recent messages:
Setting up Mew world...
Updating status...done
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Scanning +inbox...done
(New file)
Saving file /home/wl/Mail/draft/2...
Wrote /home/wl/Mail/draft/2
Draft is prepared
Kill draft message? (y or n) y
Draft was killed

Configured using:
 'configure MAKEINFO=/usr/bin/makeinfo --with-x-toolkit=gtk
 --enable-checking=yes,glyphs --enable-check-lisp-object-type
 'CFLAGS=-O0 -g3 -gdwarf-4''

Configured features:
XPM JPEG TIFF GIF PNG RSVG IMAGEMAGICK SOUND GPM DBUS GSETTINGS NOTIFY
GNUTLS LIBXML2 FREETYPE M17N_FLT LIBOTF XFT ZLIB TOOLKIT_SCROLL_BARS
GTK3 X11 THREADS LIBSYSTEMD JSON LCMS2

Important settings:
  value of $LANG: de_AT.UTF-8
  value of $XMODIFIERS: @im=none
  locale-coding-system: utf-8-unix

Major mode: Summary

Minor modes in effect:
  TeX-PDF-mode: t
  tooltip-mode: t
  global-eldoc-mode: t
  electric-indent-mode: t
  mouse-wheel-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
  buffer-read-only: t
  column-number-mode: t
  transient-mark-mode: t

Load-path shadows:
/usr/local/share/emacs/site-lisp/thai-word hides /usr/local/share/emacs/27.0.50/lisp/language/thai-word

Features:
(shadow emacsbug message rmc puny dired dired-loaddefs format-spec
rfc822 mml mml-sec epa gnus-util rmail rmail-loaddefs mm-decode
mm-bodies mm-encode mail-parse rfc2231 mailabbrev gmm-utils mailheader
sendmail rfc2047 rfc2045 ietf-drums mail-utils pp mew-varsx mew-unix
time-date elec-pair edmacro kmacro rng-nxml rng-valid rng-loc rng-uri
rng-parse nxml-parse rng-match rng-dt rng-util rng-pttrn nxml-ns
nxml-mode nxml-outln nxml-rap nxml-util nxml-enc xmltok sgml-mode dom
hideshow cal-menu calendar cal-loaddefs mew-auth mew-config mew-imap2
mew-imap mew-nntp2 mew-nntp mew-pop mew-smtp mew-ssl mew-ssh mew-net
mew-highlight mew-sort mew-fib mew-ext mew-refile mew-demo mew-attach
mew-draft mew-message mew-thread mew-virtual mew-summary4 mew-summary3
mew-summary2 mew-summary mew-search mew-pick mew-passwd mew-scan
mew-syntax mew-bq mew-smime mew-pgp mew-header mew-exec mew-mark
mew-mime mew-edit mew-decode mew-encode mew-cache mew-minibuf
mew-complete mew-addrbook mew-local mew-vars3 mew-vars2 mew-vars
mew-env mew-mule3 mew-mule mew-gemacs mew-key mew-func mew-blvs
mew-const mew tex dbus xml crm advice auto-loads tex-site quail
cjktilde mm-util mail-prsvr disp-table finder-inf package let-alist
derived pcase cl-extra help-mode easymenu url-handlers url-parse
auth-source cl-seq eieio eieio-core cl-macs eieio-loaddefs
password-cache json map url-vars seq byte-opt gv bytecomp byte-compile
cconv epg epg-config subr-x cl-loaddefs cl-lib mule-util 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 menu-bar rfn-eshadow
isearch timer select scroll-bar mouse jit-lock font-lock syntax
facemenu font-core term/tty-colors frame cl-generic cham georgian
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ethiopic indian cyrillic chinese composite charscript charprop
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code-pages mule custom widget hashtable-print-readable backquote
dbusbind inotify lcms2 dynamic-setting system-font-setting
font-render-setting move-toolbar gtk x-toolkit x multi-tty
make-network-process emacs)

Memory information:
((conses 16 218273 12220)
 (symbols 48 30642 1)
 (miscs 40 254 176)
 (strings 32 70199 1287)
 (string-bytes 1 1788529)
 (vectors 16 27708)
 (vector-slots 8 781202 22292)
 (floats 8 80 37)
 (intervals 56 1514 152)
 (buffers 992 12)
 (heap 1024 36966 1819))

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