[Bug libstdc++/80737] New: variant as class member resulting to compile errors

[z-1st at mail dot ru]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80737

            Bug ID: 80737
           Summary: variant<any> as class member resulting to compile
                    errors
           Product: gcc
           Version: 7.1.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: libstdc++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: z-1st at mail dot ru
  Target Milestone: ---

variant<any> works as expected outside the class. But if it is declared as a
class member it doesn't compile in some cases

The following example doesn't compile

struct MyClass
{
    variant<any> var;
};
int main()
{
    MyClass s; //fail
    return 0;
}

However, the following compiles

    MyClass s{}; //works
    MyClass s{1};//works

Also, it is not possible to write custom constructors arount it.

Example output:
https://godbolt.org/g/NNQR09