My eix (SVN reision 936) often prints the following message: std::string PrintFormat::get_pkg_property(const Package*, const std::string&) const: Unknown property '' I've tracked the problem down to an uninitialized rhs field in the Node class. The attached patch fixes the problem for me.
Created attachment 205745 [details, diff] Fix for the uninitialized variable
Thanks a lot; you certainly spent a lot of time: Such mistakes are hard to find and hard to reproduce, especially since the missing initialization was by RHS_STRING=0 (in fact, it never occurred to me). This will be fixed in eix-0.18.2
I suppose that I can close this bug, since eix-0.18.2 with the fix is now in the tree. Thanks again.