[Bug libstdc++/64650] New: 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

            Bug ID: 64650
           Summary: std::experimental::bad_optional_access is not default
                    constructible
           Product: gcc
           Version: 4.9.3
            Status: UNCONFIRMED
          Keywords: rejects-valid
          Severity: normal
          Priority: P3
         Component: libstdc++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: redi at gcc dot gnu.org

This should compile using -std=c++14:

#include <experimental/optional>

std::experimental::bad_optional_access e;


badopt.cc:3:40: error: no matching function for call to
‘std::experimental::fundamentals_v1::bad_optional_access::bad_optional_access()’
 std::experimental::bad_optional_access e;
                                        ^