Fix bug in graph_copy()

src/graph/clustering/graph_motifs.cc

@@ -61,6 +61,7 @@ struct retrieve_from_list
             return;
         }
         graph_copy(glist.back(), g);
+        glist.pop_back();
     }
 };
 

src/graph/graph_util.hh

@@ -157,7 +157,7 @@ void graph_copy(const GraphOrig& g, GraphTarget& gt)
     typename property_map<GraphOrig, vertex_index_t>::type index = get(vertex_index, g);
     typedef typename graph_traits<GraphOrig>::vertex_descriptor vertex_t;
     typedef typename graph_traits<GraphTarget>::vertex_descriptor tvertex_t;
-    vector<tvertex_t> vmap;
+    vector<tvertex_t> vmap(num_vertices(g));
     typename graph_traits<GraphOrig>::vertex_iterator v, v_end;
     for (tie(v, v_end) = vertices(g); v != v_end; ++v)
         vmap[index[*v]] = add_vertex(gt);

src/graph_tool/clustering/__init__.py

@@ -248,7 +248,7 @@ def extended_clustering(g, props=None, max_depth=3, undirected=False):
     >>> clusts = gt.extended_clustering(g, max_depth=5)
     >>> for i in range(0, 5):
     ...    print(gt.vertex_average(g, clusts[i]))
-    ... 
+    ...
     (0.0058850000000000005, 0.0004726257592782405)
     (0.026346666666666668, 0.0009562588213100747)
     (0.11638833333333333, 0.002086419787711849)