[Bug c++/90212] [8 Regression] by-ref capture of constexpr class object rejected

[redi at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90212

--- Comment #7 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Oops, autocorrect.

s/yesterday/testcase/