wp_nav_menu generates wrong classes for li elements

[anyname2]

Function wp_nav_menu generates 2 different classes for <li> with exactly the same meaning: e.g. current-page-parent and current_page_parent. It sometimes generates one of them, but sometimes both.

Also this coresponds to current-page-ancestor and current_page_ancestor classes.

I think there should be one of them, but to preserve compatibility with older websites, it is better to leave both but generate both at the same time, so that user could use either "-" or "_" as separators.

[Latz]

Hello anyname2,

thank you for your report. Sorry you never got a response.

I can't find any appearances of current-page-parent or current-page-ancestor in the code. Could you narrow down where you think the problem is occurring?

[Latz]

The class current_page_ancestor is added intentionally for backward compatibility with the current_page_ classes defaults (#12812). I think this is a wontfix.

[chriscct7]

Per #12812, this is intended behavior.