TYPE_IVAR         454 marshal.c      	    w_byte(TYPE_IVAR, arg);
TYPE_IVAR         738 marshal.c      	    if (hasiv) w_byte(TYPE_IVAR, arg);
TYPE_IVAR         767 marshal.c      	if (hasiv) w_byte(TYPE_IVAR, arg);
TYPE_IVAR        1362 marshal.c            case TYPE_IVAR:
TYPE_IVAR        1567 marshal.c            case TYPE_IVAR: