[Bug c++/69327] [6 Regression] constexpr leaves reference member var uninitialized

[redi at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69327

--- Comment #3 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Matthias Klose from comment #2)
> r232725

That commit is newer than Stephan's original report.