diff -r 7fdaa05a69a1 -r 00f8d9f9920d test/fractional_matching_test.cc
--- a/test/fractional_matching_test.cc	Thu Sep 13 11:56:19 2012 +0200
+++ b/test/fractional_matching_test.cc	Thu Sep 13 12:02:27 2012 +0200
@@ -342,6 +342,7 @@
       check(indeg == 1, "Invalid matching");
       pv += weight[mwfm.matching(n)];
       SmartGraph::Node o = graph.target(mwfm.matching(n));
+      ignore_unused_variable_warning(o);
     } else {
       check(mwfm.nodeValue(n) == 0, "Invalid matching");
       check(indeg == 0, "Invalid matching");
@@ -406,6 +407,7 @@
     check(indeg == 1, "Invalid perfect matching");
     pv += weight[mwpfm.matching(n)];
     SmartGraph::Node o = graph.target(mwpfm.matching(n));
+    ignore_unused_variable_warning(o);
   }
 
   for (SmartGraph::EdgeIt e(graph); e != INVALID; ++e) {