Summary: PdfHandler: Thumbnail creation fails
           Product: MediaWiki extensions
           Version: any
          Platform: All
        OS/Version: Linux
            Status: NEW
          Severity: normal
          Priority: Normal
         Component: [other]

When uploading a PDF file the thumbnail and pages are not generated giving the
following error instead of the image (I've tried different PDFs):

Error creating thumbnail: convert: no decode delegate for this image format
convert: missing an image filename

Some debugging seems to show that Ghostscript may be to blame. If writing the
Ghostscript output to a file instead of piping it to convert in the PHP script
I get:

Unrecoverable error: stackunderflow in .setdistillerparams

Issueing the same command from the command line works fine and produces a

('/usr/bin/gs' -sDEVICE=jpeg -sOutputFile=- -dFirstPage=1 -dLastPage=1 -r150
-dBATCH -dNOPAUSE -q '/var/www/w/images/8/84/Poster.pdf' | sudo
'/usr/bin/convert' -depth 8 -resize 424 -
'/var/www/w/images/thumb/8/84/Poster.pdf/page1-424px-Poster.pdf.jpg') 2>&1

Linux 2.6.26-2-vserver-amd64
gs-gpl 8.62.dfsg.1-3.2lenny1
imagemagick 7:
php5-cgi 5.2.6.dfsg.1-1+lenny4

How can I further debug?
Hope you can help!


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