[Bug c++/66968] Incorrect template argument shown in diagnostic

[redi at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66968

--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Yes maybe a dup of PR99 but it looks like all the examples in that bug involve
an overload and using the parameter names from the wrong overload. Here it uses
the parameter from a function that never participates in overload resolution.