[Bug c++/93279] [9/10 Regression] C++ Template substitution ICE

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=93279

Jakub Jelinek <jakub at gcc dot gnu.org> changed:

           What    |Removed                     |Added
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                 CC|                            |jakub at gcc dot gnu.org

--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Started with r9-6405-gbddee796d0b4800b5ac3d7e7e9e315c23799424d
Reduced testcase:

template <int T> struct A { static constexpr int t = T; };
template <bool, typename> struct B;
template <typename T> struct B<true, T> { typedef T f; };
template <bool N, typename T> using C = typename B<N, T>::f;
template <typename> constexpr bool D = A<1>::t;
template <typename T, int N> struct E {
  template <typename U, C<D<E>, decltype(nullptr)> = nullptr>
  void operator * (U l) { [l](T m) { m *l; }; }
};

int
main ()
{
  E<E<float, 4>, 1> n;
  n * 4.f;
}