anticipate return codes from feasible_tree other than 0 and 1

Related to #1801.

diff --git a/lib/common/ns.c b/lib/common/ns.c
index 65c7a55fdc96403dc164ea52d728e84e2386f050..e1b0e285925283f225d6fa7a0845b2d6b1a7fe0c 100644 (file)
--- a/lib/common/ns.c
+++ b/lib/common/ns.c
@@ -852,9 +852,12 @@ int rank2(graph_t * g, int balance, int maxiter, int search_size)
        return 2;
     }
 
-    if (feasible_tree()) {
-       freeTreeList (g);
-       return 1;
+    {
+       int err = feasible_tree();
+       if (err != 0) {
+           freeTreeList (g);
+           return err;
+       }
     }
     while ((e = leave_edge())) {
        f = enter_edge(e);