[Bug c++/104294] New: ICE: tree check: accessed elt 2 of 'tree_vec' with 1 elts in tsubst_pack_expansion, at cp/pt.cc:13130

[hewillk at gmail dot com via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=104294

            Bug ID: 104294
           Summary: ICE: tree check: accessed elt 2 of 'tree_vec' with 1
                    elts in tsubst_pack_expansion, at cp/pt.cc:13130
           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: ---

template<class>
struct B;

template <class R, class... Args>
struct B<R(Args...)> {
  template<class T>
  struct C { C(T); };
};

int main() {
  B<void(int)>::C{0};
}

https://godbolt.org/z/h1jGhc5b4