Member CombinatorialMap::null_dart_handle: null dart handle is no longer static since CGAL 4.4. You can define the CGAL_CMAP_DEPRECATED macro to keep the old behavior.
Class Dart: Since CGAL 4.4, CombinatorialMap::null_dart_handle is no longer a static data member. This implies to move the following methods of Dart concept into CombinatorialMap concept: is_free, highest_nonfree_dimension, opposite and other_extremity. You can define the CGAL_CMAP_DEPRECATED macro to keep the old behavior.