gs conversion segfaults on 64bit cpu

[Peter Bengtsson]

Hi,
I've got a PDF file that I use 'convert' to convert from PDF to JPG and 
it works fine on my laptop but not on the server. They're both Ubuntu 
linuxes and one of the differences is the CPU. Mine's 32bit and the 
server is 64bit. When I was working on this bug reproduction I made sure 
the versions of the various programs where the same.

This is what happens when I try to convert the attached PDF to JPG:

$ convert "Skyways.pdf[0]" "Skyways.jpg"
 convert: Postscript delegate failed `Skyways.pdf'.

$ convert -version
 Version: ImageMagick 6.2.4 11/24/06 Q16 http://www.imagemagick.org
 Copyright: Copyright (C) 1999-2005 ImageMagick Studio LLC

$ gs --version
 8.15.2


Then if I run it more verbosely I get the following::

$ convert -verbose "Skyways.pdf[0]" "Skyways.jpg"
 "gs" -q -dBATCH -dSAFER -dMaxBitmap=500000000 -dNOPAUSE 
-dAlignToPixels=0 "-sDEV
ICE=pnmraw" -dTextAlphaBits=4 -dGraphicsAlphaBits=4 "-g595x842" 
"-r72x72" -dFirs
tPage=1 -dLastPage=1 "-sOutputFile=/tmp/magick-XXMpljof" 
"-f/tmp/magick-XXtzKB4f
" "-f/tmp/magiclnn1He"
 Start of Image
 Define Huffman Table 0x00
          0   1   5   1   1   1   1   1
          1   0   0   0   0   0   0   0
 Define Huffman Table 0x01
          0   3   1   1   1   1   1   1
          1   1   1   0   0   0   0   0
 Define Huffman Table 0x10
          0   2   1   3   3   2   4   3
          5   5   4   4   0   0   1 125
 Define Huffman Table 0x11
          0   2   1   2   4   4   3   4
          7   5   4   4   0   1   2 119
 End Of Image
 convert: Postscript delegate failed `Skyways.pdf'.


The strange thing is that if I run the exact same command (with 
-verbose) on my laptop I get a slightly different message. So, on my 
laptop I get this::

$ convert -verbose "Skyways.pdf[0]" Skyways.jpg
 "gs" -q -dBATCH -dSAFER -dMaxBitmap=500000000 -dNOPAUSE
 -dAlignToPixels=0 "-sDEVICE=pnmraw" -dTextAlphaBits=4
 -dGraphicsAlphaBits=4 "-g595x842" "-r72x72" -dFirstPage=1
 -dLastPage=1 "-sOutputFile=/tmp/magick-XXcNEf4X"
 "-f/tmp/magick-XX9gy9Jj" "-f/tmp/magicEz5loC"/tmp/magick-XXcNEf4X
 PNM 595x842 DirectClass 1.4mb
 Skyways.pdf PDF 595x842 595x842+0+0 DirectClass 1.4mb
 Skyways.pdf PDF 595x842 595x842+0+0 DirectClass 1.4mb
 Skyways.pdf=>Skyways.jpg PDF 595x842 595x842+0+0 DirectClass 113kb


Still no good explaination why the JPG can't be created from the PDF on 
the 64bit server. That's when I did an strace (log file attached).

I hope this helps. I can provide more details if you need them.

Best regards,
Peter


--
Peter Bengtsson,
work www.fry-it.com
home www.peterbe.com
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