diff -r 2eebc8f7dca5 -r 17e36e175725 lemon/dfs.h
--- a/lemon/dfs.h	Tue Nov 01 08:24:30 2011 +0100
+++ b/lemon/dfs.h	Tue Dec 20 17:35:45 2011 +0100
@@ -557,7 +557,7 @@
     ///added with addSource() before using this function.
     void start(Node t)
     {
-      while ( !emptyQueue() && G->target(_stack[_stack_head])!=t )
+      while ( !emptyQueue() && !(*_reached)[t] )
         processNextArc();
     }
 
@@ -1509,7 +1509,7 @@
     /// \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();
     }