[Bug c++/67898] rejects-valid on overloaded function as non-type template argument of dependent type

[richard-gccbugzilla at metafoo dot co.uk]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67898

--- Comment #2 from Richard Smith <richard-gccbugzilla at metafoo dot co.uk> ---
(Clang trunk now accepts both testcases.)