Some warnings are confirmed with Hugo 0.57.2 (the latest version as of 2019-09-02).
WARN 2019/09/02 03:50:09 Page's .Hugo is deprecated and will be removed in a future release. Use the global hugo function.
WARN 2019/09/02 03:50:09 Page's .URL is deprecated and will be removed in a future release. Use .Permalink or .RelPermalink. If what you want is the front matter URL value, use .Params.url.
Some warnings are confirmed with Hugo 0.57.2 (the latest version as of 2019-09-02).