diff -r 7fdaa05a69a1 -r 00f8d9f9920d lemon/planarity.h
--- a/lemon/planarity.h	Thu Sep 13 11:56:19 2012 +0200
+++ b/lemon/planarity.h	Thu Sep 13 12:02:27 2012 +0200
@@ -72,7 +72,6 @@
       }
 
       void discover(const Arc& arc) {
-        Node source = _graph.source(arc);
         Node target = _graph.target(arc);
 
         _tree_map[arc] = true;