I believe I have figured out a simple workaround, as well as a pretty
good clue as to the source of this error. For me, it turned out that
there were a couple of broken .ttf files, specifically
/usr/share/fonts/truetype/ttf-dejavu/DejaVuSansCondensed-BoldOblique.ttf
/usr/share/fonts/truetype/ttf-dejavu/DejaVuSerifCondensed-BoldItalic.ttf
The bug is more easily duplicated by running
# xfstt --sync
When you run that, you can see it going through the font directories in
/usr/share/fonts until you hit a crash. Then you can weed out the
broken fonts from that directory, and the problem will go away
completely.
I also had two broken .ttf files from a private font package, which
probably won't affect most people, but to find them I just copied all
the fonts from the directory that had broken fonts and used this perl
script to iterate through them until I got a stack trace from xfstt. It
might be useful for people who have additional broken .ttf files that
aren't in a standard .deb
#!/usr/bin/perl
my $dir = "ttf-dejavu";
opendir D, "/root/$dir";
while (my $filename = readdir D) {
-f "/root/$dir/$filename" or next;
print "$filename\n";
system "mv","/root/$dir/$filename","/usr/share/fonts/truetype/$dir";
system "xfstt --sync";
<STDIN>;
}
closedir D;
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https://bugs.launchpad.net/bugs/807726
Title:
xfstt assert failure: *** stack smashing detected ***: /usr/bin/xfstt
terminated
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