message: Fix more errors on Windows
diff: @@ -331,7 +331,7 @@ pub(crate) fn poll(
  .bytes_available_write()?
  .map(|s| s > 0)
  .unwrap_or(false);
  - let is_closed = file.is_open() == false;
  + let is_closed = !file.is_open();
  tracing::debug!(
  "poll_evt can_read={} can_write={} is_closed={}",
  