https://gcc.gnu.org/bugzilla/show_bug.cgi?id=113060
--- Comment #6 from Jiang An <de34 at live dot cn> ---
(In reply to Jiang An from comment #5)
> `decltype(std::declval<auto (*)(_Tp&& __t) ->
> decltype(_Arr<_Ti>{{std::forward<_Tp>(__t)}})>(std::declval<_Tp>()))`
Typo, this should be
`decltype(std::declval<auto (*)(_Tp&& __t) ->
decltype(_Arr<_Ti>{{std::forward<_Tp>(__t)}})>()(std::declval<_Tp>()))`.
