[Bug c++/118199] [15 regression] -fno-elide-constructors vs no_unique_address

[sjames at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=118199

--- Comment #15 from Sam James <sjames at gcc dot gnu.org> ---
.. because the default is gnu++17. It of course does help if I specify
-std=c++14 on this testcase.