[Bug c++/91889] [10 Regression] error: call of overloaded ‘to_value_ptr(B*&)’ is ambiguous

[mpolacek at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91889

--- Comment #7 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Maybe the ranking needs additional wording, thus input from CWG.