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[Daxxi <ubuntuforums@xxxxxxxxxxxxxxx>]

In my original file which failed to print, the '//' does not start in column 1.
The full line, which I isolated by binary chopping, is:
    optind = 0; // initialise the getopt static

By changing the 's' of the word "static" to (e.g.) 'S' (upper case) or '5' (five) or '*' enables the whole file to prettyprint to PDF.
Changing back to lower case 's' causes the original failure.

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https://bugs.launchpad.net/bugs/1418326

Title:
  "lpr -p -P PDF" (prettyprint) hangs print job with sample string

Status in cups package in Ubuntu:
  New

Bug description:
  
  $ echo '// static' | lpr -p -P PDF    # Fails somewhere - print job hangs

  $ lpstat -o PDF
  PDF-169                 dave              1024   Thu 05 Feb 2015 03:45:14 GMT

  $ lpstat -t    #  [output snipped] ...
  printer PDF is idle.  enabled since Thu 05 Feb 2015 03:45:14 GMT
          loadFile failed: temp file: not a PDF file
  PDF-169                 dave              1024   Thu 05 Feb 2015 03:45:14 GMT

  # CUPS reports "Filter failed" in web interface:
  # PDF-169  Unknown  Withheld  1k  1 stopped  "Filter failed"

  # RESET (remove job)
  $ lprm -P PDF; lpstat -o PDF
  $

  Here are a few examples which *do not* cause a problem:

  $ echo '// tatic' | lpr -p -P PDF
  $ lpstat -o PDF
  $

  $ echo '// stati' | lpr -p -P PDF
  $ lpstat -o PDF
  $

  $ echo '/ static' | lpr -p -P PDF
  $ lpstat -o PDF
  $

  $ echo ' static' | lpr -p -P PDF
  $ lpstat -o PDF
  $

  $ echo '/static' | lpr -p -P PDF
  $ lpstat -o PDF
  $

  $ echo 'static' | lpr -p -P PDF
  $ lpstat -o PDF
  $

  $ echo '          //   static' | lpr -p -P PDF
  $ lpstat -o PDF
  $

  
  Now I'm bored ;-)

  $ echo '//           static' | lpr -p -P PDF
  $ lpstat -o PDF
  PDF-175                 dave              1024   Thu 05 Feb 2015 04:31:25 GMT
  $

  I hope there are some clues, there.  I'm assuming you will get my
  system info from the "ubuntu-bug cups" I did.

  Dave

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: cups 1.7.2-0ubuntu1.2
  ProcVersionSignature: Ubuntu 3.13.0-45.74-generic 3.13.11-ckt13
  Uname: Linux 3.13.0-45-generic x86_64
  NonfreeKernelModules: nvidia
  ApportVersion: 2.14.1-0ubuntu3.6
  Architecture: amd64
  CurrentDesktop: KDE
  Date: Thu Feb  5 03:56:02 2015
  InstallationDate: Installed on 2014-09-08 (149 days ago)
  InstallationMedia: Kubuntu 14.04.1 LTS "Trusty Tahr" - Release amd64 (20140722.2)
  Lpstat:
   device for EPSON_XP-312: dnssd://EPSON%20XP-312%20313%20315%20Series._ipp._tcp.local/
   device for PDF: cups-pdf:/
  MachineType: To be filled by O.E.M. To be filled by O.E.M.
  Papersize: a4
  PpdFiles:
   PDF: Generic CUPS-PDF Printer
   EPSON_XP-312: Epson XP-312 313 315 Series - epson-inkjet-printer 1.0.0-1lsb3.2 (Seiko Epson Corporation LSB 3.2)
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-45-generic root=UUID=ec73b7e0-d4a3-4a87-852b-085668e2b46b ro quiet splash
  SourcePackage: cups
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 04/10/2013
  dmi.bios.vendor: American Megatrends Inc.
  dmi.bios.version: 1708
  dmi.board.asset.tag: To be filled by O.E.M.
  dmi.board.name: M5A97 R2.0
  dmi.board.vendor: ASUSTeK COMPUTER INC.
  dmi.board.version: Rev 1.xx
  dmi.chassis.asset.tag: To Be Filled By O.E.M.
  dmi.chassis.type: 3
  dmi.chassis.vendor: To Be Filled By O.E.M.
  dmi.chassis.version: To Be Filled By O.E.M.
  dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr1708:bd04/10/2013:svnTobefilledbyO.E.M.:pnTobefilledbyO.E.M.:pvrTobefilledbyO.E.M.:rvnASUSTeKCOMPUTERINC.:rnM5A97R2.0:rvrRev1.xx:cvnToBeFilledByO.E.M.:ct3:cvrToBeFilledByO.E.M.:
  dmi.product.name: To be filled by O.E.M.
  dmi.product.version: To be filled by O.E.M.
  dmi.sys.vendor: To be filled by O.E.M.

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