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);