[Bug c++/98216] [C++20] std::array<double, N> template parameter error with negative values

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98216

--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
I guess the issue has to be with you using 'static constexpr auto arr' and
that not being correctly templated on the expression.

Well, confirmed your observation.