(gdb) bt
#0  0x00007fffed231c03 in ogg_page_serialno () from /usr/lib/x86_64-linux-gnu/libogg.so.0
#1  0x00007ffff4d60afa in ov_pcm_seek_page () from /usr/lib/x86_64-linux-gnu/libvorbisfile.so.3
#2  0x00007ffff4d60d4c in ov_pcm_seek () from /usr/lib/x86_64-linux-gnu/libvorbisfile.so.3
#3  0x00007ffff4f72560 in ?? () from /usr/lib/x86_64-linux-gnu/libSDL_mixer-1.2.so.0
#4  0x00007ffff4f72625 in ?? () from /usr/lib/x86_64-linux-gnu/libSDL_mixer-1.2.so.0
#5  0x00007ffff4f73229 in Mix_FadeInMusicPos () from /usr/lib/x86_64-linux-gnu/libSDL_mixer-1.2.so.0
#6  0x0000000000e9e7b9 in sound::music_thinker::process(events::pump_info&) ()
#7  0x0000000000e2bf2a in events::pump() ()
#8  0x000000000096bbe1 in controller_base::play_slice(bool) ()
#9  0x00000000006ddd6e in intf_delay(lua_State*) ()
#10 0x0000000000d3d695 in luaD_precall(lua_State*, lua_TValue*, int) ()
#11 0x0000000000d48dd8 in luaV_execute(lua_State*) ()
#12 0x0000000000d3da5c in luaD_call(lua_State*, lua_TValue*, int, int) ()
#13 0x0000000000d3d06f in luaD_rawrunprotected(lua_State*, void (*)(lua_State*, void*), void*) ()
#14 0x0000000000d3e082 in luaD_pcall(lua_State*, void (*)(lua_State*, void*), void*, long, long) ()
#15 0x0000000000d3b843 in lua_pcallk(lua_State*, int, int, int, int, int (*)(lua_State*)) ()
#16 0x00000000006f4b06 in luaW_pcall(lua_State*, int, int, bool) ()
#17 0x00000000006eec6e in LuaKernel::run_wml_action(std::string const&, vconfig const&, game_events::queued_event const&) ()
#18 0x00000000009f894c in game_events::handle_event_commands(game_events::queued_event const&, vconfig const&) ()
#19 0x00000000009f486f in game_events::event_handler::handle_event(game_events::queued_event const&, boost::shared_ptr<game_events::event_handler>&) ()
#20 0x00000000009fb059 in game_events::pump() ()
#21 0x0000000000bcad5e in play_controller::fire_start(bool) ()
#22 0x00000000006a0d1c in playsingle_controller::play_scenario(std::pair<config::const_child_iterator, config::const_child_iterator> const&, bool) ()
#23 0x0000000000690675 in play_game(game_display&, game_state&, config const&, io_type_t, bool, bool, bool) ()
#24 0x00000000004c745f in game_controller::launch_game(game_controller::RELOAD_GAME_DATA) ()
#25 0x0000000000448d12 in main ()