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<base href="https://bugs.freedesktop.org/">
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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - Segmentation fault in FcFontMatch when attempting to render emoji"
href="https://bugs.freedesktop.org/show_bug.cgi?id=107531">107531</a>
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<th>Summary</th>
<td>Segmentation fault in FcFontMatch when attempting to render emoji
</td>
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<th>Product</th>
<td>fontconfig
</td>
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<th>Version</th>
<td>unspecified
</td>
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<th>Hardware</th>
<td>Other
</td>
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<th>OS</th>
<td>All
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<th>Status</th>
<td>NEW
</td>
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<th>Severity</th>
<td>normal
</td>
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<th>Priority</th>
<td>medium
</td>
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<th>Component</th>
<td>fc-match
</td>
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<th>Assignee</th>
<td>fontconfig-bugs@lists.freedesktop.org
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<th>Reporter</th>
<td>krotov@iitp.ru
</td>
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<th>QA Contact</th>
<td>freedesktop@behdad.org
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<pre>Created <span class=""><a href="attachment.cgi?id=141016" name="attach_141016" title="A program to reproduce segmentation fault">attachment 141016</a> <a href="attachment.cgi?id=141016&action=edit" title="A program to reproduce segmentation fault">[details]</a></span>
A program to reproduce segmentation fault
dwm, dmenu and st (from <a href="https://suckless.org/">https://suckless.org/</a>) are known to segfault when
trying to render emoji.
I have reduced dmenu segfault down to a simple program that reproduces the bug.
To reproduce, compile the program attached with
gcc bug.c -lX11 -lXft -I /usr/include/freetype2 -lfontconfig
and run.
Backtrace:
Program received signal SIGSEGV, Segmentation fault.
0x00007ffff7821e71 in ?? () from /usr/lib/x86_64-linux-gnu/libfontconfig.so.1
(gdb) bt
#0 0x00007ffff7821e71 in ?? () from
/usr/lib/x86_64-linux-gnu/libfontconfig.so.1
#1 0x00007ffff7821fc8 in ?? () from
/usr/lib/x86_64-linux-gnu/libfontconfig.so.1
#2 0x00007ffff7823028 in FcConfigSubstituteWithPat () from
/usr/lib/x86_64-linux-gnu/libfontconfig.so.1
#3 0x00007ffff78329dd in FcFontRenderPrepare () from
/usr/lib/x86_64-linux-gnu/libfontconfig.so.1
#4 0x00007ffff7832fc4 in FcFontMatch () from
/usr/lib/x86_64-linux-gnu/libfontconfig.so.1
#5 0x000055555555531c in main ()
Software versions:
$ cat /etc/debian_version
buster/sid
$ apt show fontconfig
Package: fontconfig
Version: 2.13.0-5</pre>
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