[Bug libstdc++/64650] std::experimental::bad_optional_access is not default constructible

[redi at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64650

Jonathan Wakely <redi at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2015-01-17
     Ever confirmed|0                           |1
      Known to fail|                            |4.9.3, 5.0