[Bug c++/103338] New: ICE: in tsubst_pack_expansion, at cp/pt.c:13167

[hewillk at gmail dot com via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=103338

            Bug ID: 103338
           Summary: ICE: in tsubst_pack_expansion, at cp/pt.c:13167
           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: ---

[7/8/9/10/11/12 Regression] 

template<class...>
struct zip_view {
  struct Iterator;
};

template<class...>
struct zip_transform_view;

template<class... Views>
struct zip_view<Views...>::Iterator {
  template<class... Uiews>
  template<bool>
  friend class zip_transform_view<Uiews...>::Iterator;
};

zip_view<>::Iterator iter;

https://godbolt.org/z/95Yvq4heP