(gdb) bt
#0 0x000000000044922e in THSpriteSheet::_makeAltBitmap(THSpriteSheet::sprite_t*) ()
#1 0x0000000000449010 in THSpriteSheet::drawSprite(THRenderTarget*, unsigned int, int, int, unsigned long) ()
#2 0x0000000000458e72 in THAnimationManager::drawFrame(THRenderTarget*, unsigned int, THLayers_t const&, int, int, unsigned long) const ()
#3 0x00000000004596e0 in THAnimation::draw(THRenderTarget*, int, int) ()