external/boost/gcc9.patch.0

   1 --- boost/bimap/detail/map_view_iterator.hpp
   2 +++ boost/bimap/detail/map_view_iterator.hpp
   3 @@ -165,6 +165,7 @@
   4        : base_(iter.base()) {}
   5         const_map_view_iterator(map_view_iterator<Tag,BimapCore> i)
   6        : base_(i.base()) {}
   7 +    const_map_view_iterator & operator = (const_map_view_iterator const &) = default;
   8
   9      BOOST_DEDUCED_TYPENAME base_::reference dereference() const
  10      {