rb_io_flush_raw  2271 file.c         	rb_io_flush_raw(obj, 0);
rb_io_flush_raw  4499 file.c             rb_io_flush_raw(obj, 0);
rb_io_flush_raw  4604 file.c         	rb_io_flush_raw(obj, 0);
rb_io_flush_raw  1582 io.c               return rb_io_flush_raw(io, 1);