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[Launchpad Bug Tracker <1051939@xxxxxxxxxxxxxxxxxx>]

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After upgrading from Ubuntu 12.04 to Ubuntu 12.10 the PDF files created by Inkscape are causing Xelatex to crash. This happens when a figure includes gradients. The compilation process exits with the message:
** ERROR ** pdf_link_obj(): passed invalid object

As discussed in this thread, the error seems to appear for PDF file with broken references:
http://tug.org/pipermail/xetex/2010-December/019653.html

Such files seem to be fixed by running "pdftk". The version number of
inkscape in 12.04 and 12.10 didn't change though, the libpoppler and
cairo libraries did, so the error might be located there...

Steps to reproduce:
Create a figure with a gradient in Inkscape and save it as PDF. Include this PDF in a latex document and try  to compile it with xelatex.

** Affects: cairo (Ubuntu)
     Importance: Undecided
         Status: Confirmed

** Affects: cairo (Debian)
     Importance: Unknown
         Status: New

-- 
Regression: PDF files created with Inkscape are crashing Xelatex
https://bugs.launchpad.net/bugs/1051939
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