404 for registered package with no release

[inglesp]

This was originally raised against PyPI.

When a package has been registered, but no release has been uploaded, Warehouse returns a 404. It would be more helpful if it displayed information about package.

For an example of this, see https://pypi.io/project/spider/.

[reversefold]

How does one find out information about a registered package which has no releases? I tried to upload a package for which I thought the name was unused but got an error (see the linked ticket). I'd like to be able to contact the person who registered it as well as seeing how old the registration is but am not sure how to do so.