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From: "redi at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/102000] Defaulted consteval default constructor that
 performs no initialization is not rejected
Date: Mon, 23 Aug 2021 09:54:47 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D102000

--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Johel Ernesto Guerrero Pe=C3=B1a from comment #1)
> Can https://bugs.llvm.org/show_bug.cgi?id=3D51560 be fixed as part of thi=
s?

That is:

struct X{
  int i;
  consteval X() =3D default;
  // consteval X() {}
};
int main () {
    auto x =3D X();
    (void)x;
}

Which is also accepts-invalid=