diff --git a/README.md b/README.md
index ea16f87..e142d81 100644
--- a/README.md
+++ b/README.md
@@ -205,7 +205,7 @@ Rendering routes with graphviz
 
 The `test_gvc_render_file` API let you render the whole route trie into a image.
 
-![Imgur](http://i.imgur.com/ZwaDEAq.png)
+![Imgur](http://i.imgur.com/hA8QXRi.png)
 
 Or you can even export it with dot format:
 
diff --git a/src/gvc.c b/src/gvc.c
index dc0aacd..b4669fe 100644
--- a/src/gvc.c
+++ b/src/gvc.c
@@ -23,8 +23,8 @@ void r3_tree_build_ag_nodes(Agraph_t * g, Agnode_t * ag_parent_node, const node
         node_cnt++;
 
         char *nodename = NULL;
-        if ( n->combined_pattern ) {
-            asprintf(&nodename,"%s", n->combined_pattern);
+        if ( e && e->child && e->child->combined_pattern ) {
+            asprintf(&nodename,"%s", e->child->combined_pattern);
         } else {
             asprintf(&nodename,"#%d", node_cnt);
         }
diff --git a/src/str.c b/src/str.c
index 98bc687..3219f73 100644
--- a/src/str.c
+++ b/src/str.c
@@ -74,6 +74,13 @@ char * r3_slug_to_str(r3_slug_t *s) {
 }
 
 
+/*
+r3_slug_t * r3_slug_parse_next(r3_slug_t *s) {
+    r3_slug_parse(s->end, s->path_len - (s->end - s->begin), s->end;
+}
+*/
+
+
 r3_slug_t * r3_slug_parse(const char *needle, int needle_len, char **errstr) {
     r3_slug_t * s = r3_slug_new(needle, needle_len);