diff -r bb871cb8ac06 -r e24922c56bc2 lemon/dfs.h
--- a/lemon/dfs.h	Tue Jun 22 15:39:26 2010 +0200
+++ b/lemon/dfs.h	Wed Sep 22 08:53:09 2010 +0200
@@ -558,7 +558,7 @@
     ///added with addSource() before using this function.
     void start(Node t)
     {
-      while ( !emptyQueue() && G->target(_stack[_stack_head])!=t )
+      while ( !emptyQueue() && !(*_reached)[t] )
         processNextArc();
     }
 
@@ -1511,7 +1511,7 @@
     /// \pre init() must be called and a root node should be added
     /// with addSource() before using this function.
     void start(Node t) {
-      while ( !emptyQueue() && _digraph->target(_stack[_stack_head]) != t )
+      while ( !emptyQueue() && !(*_reached)[t] )
         processNextArc();
     }