Re: [Freetype] Freetype2 2.0.8 segfault on particular truetype font file

[Anthony Fok]

On Fri, Feb 22, 2002 at 04:09:40PM +0100, Werner LEMBERG wrote:
> >     % ttdump FOXJUMP.TTF
> >     Traceback (most recent call last):
> >       File "/usr/local/share/lib/FontTools/ttDump.py", line 31, in ?
> >         from fontTools import ttLib
> >     ImportError: No module named fontTools
> > This would have given a TTF -> XML -> TTF round-trip test.
> 
> You might try the CVS version from http://fonttools.sf.net

It appears that FreeType-2.0.8 segfaults on FOXJUMP.TTF and a few other
fonts, so this bug is unrelated to FontTools afterall.  I just downloaded

        http://www.ozemail.com.au/~philcam/foxjump.zip

and tried running "ftview 24 FOXJUMP.TTF" (FreeType-2.0.8) on both Debian
and Thiz Linux, and I experienced segfault too, just as Francois-Rene, Mike
and Nelson have experienced: something within FT_New_Face.  Francois-Rene
has filed a Debian bug report (with backtrace) on this, attached below:

Thanks in advance!  :-)

Anthony


 From: Francois-Rene Rideau <address@hidden>
 To: address@hidden
 Date: Tue, 26 Feb 2002 15:16:37 +0100

Package: libfreetype6
Version: 2.0.8-1
Severity: important

I had an old copy of the fontaddict repository at home,
and upgrading libgnomeprint-data wasn't working (see Bug#135654).
Debugging gnome-font-install --smart led to find that FT_New_Face
was causing a segfault on some files. 
Christian Marillat then told me how to diagnose the problem as being
with libfreetype6.

After installing freetype2-demos, I used the following zsh command from
/usr/local/stow.disabled/fonts-fontaddict/share/fonts/TrueType/fontaddict/

(t=0 c=0 b=0 l=() bl=() ; for i (*/*~*/fonts.*(.)) { t=$[$t + 1] ; ftdump $i >& 
bar || { a=$? ; echo $i ; echo "returned $a" ; cat bar ; if [ $a = 139 ] ; then 
bl=($bl $i) ; b=$[ $b + 1 ] ; else c=$[$c + 1] ; l=($l $i) ; fi }} ; echo "$t 
total fonts" ; echo "$c fonts that cause a simple error." ; print -l $l ; echo 
"$b fonts that cause a segfault:" ; print -l $bl )

And found:
994 total fonts
9 fonts that cause a simple error.
b/B27.ttf
f/FOXWILD.TTF
g/G_CUT1.TTF
p/PANGBL.TTF
p/PANGHO.TTF
p/PANGHOBL.TTF
p/PANGOLIN.TTF
p/PANGOTH.TTF
r/RASHELA.TTF
2 fonts that cause a segfault:
f/FOXJUMP.TTF
g/Grunge2.ttf

The errors are either a segfault with no output, or
a simple error that makes the process return 1 with following error output:
Could not open face.
  error = 0x0002

Bizarrely, running the same programs (gnome-font-install or ftdump)
under gdb will remove the segfault. Heisenbug!
When run under gdb, ftdump or ftview will simply display the usage
information, instead of segfaulting.

I can attach the culprit fonts, or you can download them from
        http://www.fontaddict.com/
(hum, looks like the site is down.)

-- System Information
Debian Release: 3.0
Kernel Version: Linux Kadath 2.4.17 #2 sam jan 12 21:07:00 CET 2002 i686 unknown

Versions of the packages libfreetype6 depends on:
ii  libc6          2.2.5-3        GNU C Library: Shared libraries and Timezone

-- 
Anthony Fok Tung-Ling
ThizLinux Laboratory   <address@hidden> http://www.thizlinux.com/
Debian Chinese Project <address@hidden>       http://www.debian.org/intl/zh/
Come visit Our Lady of Victory Camp!           http://www.olvc.ab.ca/