#0  0x00007ffff3e081b5 in *__GI_raise (sig=<value optimized out>) at ../nptl/sysdeps/unix/sysv/linux/raise.c:64
#1  0x00007ffff3e0afc0 in *__GI_abort () at abort.c:92
#2  0x00007ffff3e01301 in *__GI___assert_fail (assertion=0xe785a2 "valid()", file=<value optimized out>, line=79,
    function=0xf74ba0 "const T& shared_object<T, node>::get() const [with T = t_string_base, node = shared_node<t_string_base>]") at assert.c:81
#3  0x0000000000add504 in config::attribute_value::operator=(t_string const&) ()
#4  0x0000000000489dfc in wmi_container::to_config(config&) ()
#5  0x0000000000490f72 in carryover_info::to_config() ()
#6  0x00000000005b5e5b in savegame::savegame::savegame(game_state&, bool, std::string const&) ()
#7  0x00000000005b7b0a in savegame::scenariostart_savegame::scenariostart_savegame(game_state&, bool) ()
#8  0x000000000058b167 in play_game(display&, game_state&, config const&, io_type_t, bool) ()
#9  0x000000000046925b in game_controller::launch_game(game_controller_abstract::RELOAD_GAME_DATA) ()
#10 0x0000000000422499 in do_gameloop(int, char**) ()
#11 0x0000000000422d1d in main ()