Thread 1:

#0  0x00007ffff3acd9cd in pthread_join (threadid=140737130096384, thread_return=0x0)
    at pthread_join.c:90
#1  0x00007ffff74cc2b6 in SDL_WaitThread () from /usr/lib/x86_64-linux-gnu/libSDL-1.2.so.0
#2  0x00007ffff74c30ba in SDL_AudioQuit () from /usr/lib/x86_64-linux-gnu/libSDL-1.2.so.0
#3  0x00007ffff74c1f85 in SDL_QuitSubSystem () from /usr/lib/x86_64-linux-gnu/libSDL-1.2.so.0
#4  0x00007ffff7973d75 in Mix_CloseAudio () from /usr/lib/x86_64-linux-gnu/libSDL_mixer-1.2.so.0
#5  0x000000000060a569 in OpenXcom::Game::~Game() ()
#6  0x00000000004aca45 in main ()