[Bug c++/86953] [6/7/8/9 Regression] compiler crashes with constexpr operator== and specific struct (cxx_eval_bit_field_ref, at cp/constexpr.c:2704)

[mpolacek at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86953

--- Comment #3 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
struct B {
  double x;
  bool isfreex;
  bool isfreey;

  constexpr bool operator==(const B& other) const noexcept
  {
    return (x == other.x) && (isfreex == other.isfreex) && (isfreey ==
other.isfreey);
  }

  constexpr bool operator!=(const B& other) const noexcept { return !(*this ==
other); }
};

int
main ()
{
  bool b = B{} == B{};
}