[Bug c++/57466] [DR 1584] Argument deduction fails for 'const T*' when T is function type

[redi at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=57466

--- Comment #17 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Fine by me.

EDG agrees with GCC, but Clang accepts the original example. I guess they'll
change when 1584 gets resolved.