[Bug c++/103879] error: accessing value of variant::_Copy_ctor_base through a 'const variant<string>' glvalue in a constant expression

[ppalka at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=103879

--- Comment #9 from Patrick Palka <ppalka at gcc dot gnu.org> ---
That one unfortunately seems to be an unrelated constexpr bug.  Mind opening a
separate PR?

I'm reducing the testcase..