It's possible to have a category bubble in the category editor for a category that doesn't have a description page. It would be useful to see that it doesn't exist.

In the source editor this can be achieved while editing by doing a preview and seeing that the link at the bottom is red, so this is a bit of a regression.

Version: unspecified
Severity: minor
See Also:
https://bugzilla.wikimedia.org/show_bug.cgi?id=49044