Program received signal SIGSEGV, Segmentation fault. 0x00007ffff7890f1b in std::basic_string, std::allocator >::basic_string(std::string const&) () from /usr/lib/gcc/x86_64-pc-linux-gnu/4.9.3/libstdc++.so.6 (gdb) bt #0 0x00007ffff7890f1b in std::basic_string, std::allocator >::basic_string(std::string const&) () from /usr/lib/gcc/x86_64-pc-linux-gnu/4.9.3/libstdc++.so.6 #1 0x00005555556302c2 in std::_Rb_tree_iterator > std::_Rb_tree, std::_Select1st >, std::less, std::allocator > >::_M_emplace_hint_unique, std::tuple<> >(std::_Rb_tree_const_iterator >, std::piecewise_construct_t const&, std::tuple&&, std::tuple<>&&) () #2 0x0000555555628881 in PrintFormat::recPrint(OutputString*, void*, void (*)(OutputString*, PrintFormat const*, void*, std::string const&), Node*) const () #3 0x0000555555628ab3 in PrintFormat::print(void*, void (*)(OutputString*, PrintFormat const*, void*, std::string const&), Node*, DBHeader const*, VarDbPkg*, PortageSettings const*, SetStability const*, bool) () #4 0x00005555556660fd in print_found_package(Package*) () #5 0x0000555555669239 in run_eix_diff(int, char**) () #6 0x000055555555c576 in main ()