1.1 --- a/test/min_cost_arborescence_test.cc	Wed Nov 07 18:10:07 2012 +0100
     1.2 +++ b/test/min_cost_arborescence_test.cc	Wed Nov 28 11:42:38 2012 +0100
     1.3 @@ -91,6 +91,7 @@
     1.4    Arc e;
     1.5    VType c;
     1.6    bool b;
     1.7 +  ignore_unused_variable_warning(c,b);
     1.8    int i;
     1.9    CostMap cost;
    1.10    ArbMap arb;