Upstream has fixed this here: https://github.com/tornadoweb/tornado/commit/2971e857104f8d02fa9107a0e13f50170eb4f30d
Upstream has fixed this here: https:/ /github. com/tornadoweb/ tornado/ commit/ 2971e857104f8d0 2fa9107a0e13f50 170eb4f30d