--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gcc/testsuite/g++.dg/torture/pr47313.C	Fri Oct 27 22:46:09 2017 +0900
@@ -0,0 +1,53 @@
+// { dg-do compile }
+
+namespace internal {
+    template < class DSC, bool Const >   struct CC_iterator   {
+	typedef CC_iterator iterator;
+	typedef typename DSC::value_type value_type;
+	typedef const value_type* pointer;
+	CC_iterator ()     ;
+	CC_iterator (const iterator &it)     {
+	}
+	pointer p;
+	pointer operator->() const ;
+    };
+}
+template < class T > struct Compact_container {
+    typedef Compact_container <T> Self;
+    typedef T value_type;
+    typedef internal::CC_iterator<Self, false> iterator;
+};
+template < typename TDS = void > struct Periodic_3_triangulation_ds_cell_base_3 {
+    typedef typename TDS::Vertex_handle Vertex_handle;
+    const Vertex_handle& vertex(int i) const   {
+    }
+};
+struct Triangulation_data_structure_3    {
+    typedef Triangulation_data_structure_3 Tds;
+    typedef Periodic_3_triangulation_ds_cell_base_3<Tds> Cell;
+    typedef Compact_container<Cell> Cell_range;
+    typedef Compact_container<int> Vertex_range;
+    typedef typename Cell_range::iterator Cell_handle;
+    typedef typename Vertex_range::iterator Vertex_handle;
+};
+typedef Triangulation_data_structure_3 TDS1;
+template <  class > struct Periodic_3_Delaunay_triangulation_3 {
+    typedef TDS1::Vertex_handle Vertex_handle;
+    typedef TDS1::Cell_handle Cell_handle;
+    int compare_distance() const {
+    }
+    Vertex_handle nearest_vertex() const;
+};
+template < class Tds > typename Periodic_3_Delaunay_triangulation_3<Tds>::Vertex_handle Periodic_3_Delaunay_triangulation_3<Tds>::nearest_vertex() const {
+    Cell_handle c ;
+    Vertex_handle nearest = c->vertex(0);
+    nearest = (compare_distance() == -1) ?       nearest : c->vertex(0);
+    return nearest;
+}
+typedef Periodic_3_Delaunay_triangulation_3<TDS1> PDT1;
+struct Periodic_3_triangulation_hierarchy_3   : PDT1 {
+    Vertex_handle   nearest_vertex() const;
+};
+Periodic_3_triangulation_hierarchy_3::Vertex_handle Periodic_3_triangulation_hierarchy_3:: nearest_vertex() const {
+    return PDT1::nearest_vertex();
+}