libtcod-ruby-test hangs on quit

[suetanvil]

The example program libtcod-ruby-test works fine on my system. However, when I exit by pressing ESC, the program closes the main window and hangs. Standard CTRL+C kills the program.

I placed a puts at the end of the program and that executes.

I've tried recompiling libtcod from source against my system's SDL and I still get the same behaviour. Doing a backtrace in gdb shows it's hanging in pthread_join called from SDL_WaitThread() and (via some intermediate functions) SDL_Quit().

I'm running 64-bit Ubuntu 13.10 on an AMD system.

[suetanvil]

It looks like it's due to the timer subsystem. The thread it's waiting on seems to be launched by that.

As far as I can tell right now, libtcod isn't using the SDL timer but it enables the subsystem. When I disable it:

src/sys_sdl_c.c, line 778:
-       TCOD_IFNOT(SDL_Init(SDL_INIT_TIMER|SDL_INIT_VIDEO) >= 0 ) return;
+/*     TCOD_IFNOT(SDL_Init(SDL_INIT_TIMER|SDL_INIT_VIDEO) >= 0 ) return;*/
+       TCOD_IFNOT(SDL_Init(SDL_INIT_VIDEO) >= 0 ) return;

the problem goes away.