rand_start        260 random.c           return &rand_start(&default_rand)->mt;
rand_start        348 random.c       	return rand_start(&default_rand);
rand_start       1431 random.c           rb_random_t *rnd = rand_start(&default_rand);
rand_start       1456 random.c           VALUE v = rand_random(argc, argv, Qnil, rand_start(&default_rand));