[Bug c++/66834] [concepts] concept parameter kind mismatch causes hard error

[eric.niebler at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66834

--- Comment #5 from Eric Niebler <eric.niebler at gmail dot com> ---
I would expect a partial ordering to prefer the two-parameter overload in that
case. But yeah, it's a separate issue.