[Bug c++/105491] [10/11/12/13 Regression] Usage of __constinit with -std=c++11 does is rejected

[mpolacek at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=105491

--- Comment #5 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
// PR c++/105491

struct V {
  virtual int foo();
};
struct S : V {
  constexpr S(int) : b() { }
  bool b;
};
struct W {
  constexpr W() : s({}) {}
  union {
    S s;
  };
};
constexpr W w;