[Bug libstdc++/101960] std::tuple with an array element is rejected as a named return type

[redi at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101960

--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> ---
N.B. simply defining it as defaulted would make it trivial for some
specializations, which might be an ABI break.