[Bug c++/89367] Constexpr expression is not constexpr in template, but is constexpr in non-template.

[frank.secilia at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89367

--- Comment #2 from Frank Secilia <frank.secilia at gmail dot com> ---
I searched for existing bugs. I don't know the codebase, but I think it may be
another repro case for https://gcc.gnu.org/bugzilla/show_bug.cgi?id=53181.