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From: "ppalka at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/84494] Invalid constexpr with default assignment operator
Date: Mon, 01 Feb 2021 13:43:49 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D84494

Patrick Palka <ppalka at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |ppalka at gcc dot gnu.org

--- Comment #2 from Patrick Palka <ppalka at gcc dot gnu.org> ---
Reduced testcase:

struct X {
  constexpr X() =3D default;
  constexpr X(int x) : m_value(x) {}
  constexpr X& operator=3D(const X &o) =3D default;
  int m_value {};
};

static_assert((X() =3D X(10)).m_value =3D=3D 10);

Looks like GCC 10 and later correctly accept this testcase, ever since r10-=
5143
apparently.=