https://bugzilla.wikimedia.org/show_bug.cgi?id=41381

       Web browser: ---
             Bug #: 41381
           Summary: Handle non standard PDF - Can't process font stream,
                    loading font by the name
           Product: Wikimedia
           Version: unspecified
          Platform: All
        OS/Version: All
            Status: NEW
          Severity: normal
          Priority: Unprioritized
         Component: Media storage
        AssignedTo: [email protected]
        ReportedBy: [email protected]
                CC: [email protected]
            Blocks: 41371
    Classification: Unclassified
   Mobile Platform: ---


Non standard PDF generated by PDF Complete or JRAPublish aren't readable by
GhostScript. The issue seems to be related to fonts.

[ Steps to reproduce bug ]

1. Go to a non standard PDF file, e.g. [[Commons:File:Electromagnetic
Field.pdf]]

2. Open the thumbnail (e.g. right click > view image) -
https://upload.wikimedia.org/wikipedia/commons/thumb/e/e7/Electromagnetic_Field.pdf/page1-463px-Electromagnetic_Field.pdf.jpg

[ Error message ]

Error creating thumbnail: **** Warning: can't process font stream, loading font
by the name.
**** Error reading a content stream. The page may be incomplete.
**** File did not complete the page properly and may be damaged.

**** This file had errors that were repaired or ignored.
**** The file was produced by:
**** >>>> PDF Complete 3.5.310.2002 <<<<
**** Please notify the author of the software that produced this
**** file that it does not conform to Adobe's published PDF
**** specification.

convert: no decode delegate for this image format `/tmp/magick-80d5LrYy' @
error/constitute.c/ReadImage/532.
convert: missing an image filename `/tmp/transform_34b4e206409f-1.jpg' @
error/convert.c/ConvertImageCommand/3011.

[ Side note ]

This upstream bug is related but not identical to our issue:
http://bugs.ghostscript.com/show_bug.cgi?id=691406

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