[cairo-bugs] [Bug 101833] New: Inkscape crashes with "Assertion failed", " ! surface->unbounded" when printing

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=101833

            Bug ID: 101833
           Summary: Inkscape crashes with "Assertion failed", " !
                    surface->unbounded" when printing
           Product: cairo
           Version: unspecified
          Hardware: Other
                OS: All
            Status: NEW
          Severity: normal
          Priority: medium
         Component: win32 backend
          Assignee: cairo-bugs at cairographics.org
          Reporter: eduard.braun2 at gmx.de
        QA Contact: cairo-bugs at cairographics.org

Inkscape currently crashes on win32 when printing with the following error, see
[1] for details:

  Assertion failed!

  Program: E:\Temp\Inkscape\inkscape.git\trunk\build64\inkscape\inkscape.exe
  File: ../../cairo-1.15.6/src/cairo-recording-surface.c, Line 608

  Expression: ! surface->unbounded


While trying to debug this I found a recent commit [2] addressing a similar
issue which was reported on the mailing list [3].


Investigating further I found the same code which [2] replaced in a second
location in the affected file. Out of desperation I tried to apply the patch
here, too (see attached patch) and what can I say - Inkscape doesn't crash
anymore and prints correctly!

I honestly have no experience with cairo whatsoever and don't really know what
I did here, but I hope somebody can check if my change makes any sense and
whether it's a correct fix for the issue I was seeing.



[1] https://bugs.launchpad.net/inkscape/+bug/1665768
[2]
https://cgit.freedesktop.org/cairo/commit/?id=90d50cd92315d6760069ad8062aba5e297370b20
[3] https://lists.cairographics.org/archives/cairo/2016-June/027445.html

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