[Bug c++/103952] New: ICE: in cp_finish_decl, at cp/decl.c:7933

[hewillk at gmail dot com via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=103952

            Bug ID: 103952
           Summary: ICE: in cp_finish_decl, at cp/decl.c:7933
           Product: gcc
           Version: 12.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: hewillk at gmail dot com
  Target Milestone: ---

12 regression:

template<class>
struct A {
  template<int... Is>
  struct B {
    static constexpr auto c = [] { return Is; }();
    using type = decltype(c);
  };
};

#include<tuple>
int main() {
  typename A<std::tuple<int>>::B<0>::type x;
}

https://godbolt.org/z/fxvKWP4qM