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From: "mpolacek at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/99831] ICE: in reshape_init, at cp/decl.c:6720
Date: Tue, 30 Mar 2021 19:34:34 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D99831

--- Comment #6 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Even shorter:

// PR c++/99831

template <int N> struct S {
  constexpr S(const char (&str)[N]) : value{} { }
  char value[N];
};
template <S> struct string {
  constexpr bool operator=3D=3D(const string &) const =3D default;
};
template <S L2> void operator+(string<L2>) {
  char value[1];
  S{value};
}
static_assert(string<"a">{} =3D=3D string<"a">{});=