[Bug c++/52597] [C++11] confusing diagnostics for invalid use of non-static member function in decltype

[redi at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=52597

--- Comment #7 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Fixed by r197131

    re PR c++/52597 ([C++11] confusing diagnostics for invalid use of
non-static member function in decltype)

        PR c++/52597
        * typeck.c (invalid_nonstatic_memfn_p): Use get_first_fn.  Take tree.
        * semantics.c (finish_decltype_type): Check it before type_unknown_p.
        * cp-tree.h: Adjust prototype.