Just out of interest:

Is this really a namespace conflict? As I understand the code, xpdf and
libpoppler should want to use an object of same class from the same
namespace, but due to some reason, the class code was duplicated to
xpdf. I'm not c++ expert, but perhaps this was to make linking of xpdf
simpler.

I did a short analysis before reading this bug report by myself (
http://www.halfdog.net/Security/2012/XpdfCrashAnalysisUbuntuPrecise/ ).
So from my opinion, with the patch attached, this will fix the problem
only for some combination of xpdf/poppler versions and will make problem
reappear in future.

Could someone confirm that?

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