anticipate failure from assignTracks

Related to #1801.

diff --git a/lib/ortho/ortho.c b/lib/ortho/ortho.c
index f760d13b3bd9fa8f68434ff0f6d16da15eeeca42..b7bfe7d6dacf9794b77efdb959023b686b693b17 100644 (file)
--- a/lib/ortho/ortho.c
+++ b/lib/ortho/ortho.c
@@ -1338,7 +1338,8 @@ orthoEdges (Agraph_t* g, int doLbls)
     assignSegs (n_edges, route_list, mp);
     if (setjmp(jbuf))
        goto orthofinish;
-    assignTracks (mp);
+    if (assignTracks(mp) != 0)
+       goto orthofinish;
 #ifdef DEBUG
     if (odb_flags & ODB_ROUTE) emitGraph (stderr, mp, n_edges, route_list, es);
 #endif