Merge pull request YahooArchive#349 from drewfish/gv-guard

guard against missing edges in `mojito gv`
caridy · Aug 6, 2012 · e2d77c4 · e2d77c4
2 parents 8fe58ff + f69eedc
commit e2d77c4
Showing 1 changed file with 6 additions and 4 deletions.
diff --git a/source/lib/app/commands/gv.js b/source/lib/app/commands/gv.js
@@ -396,10 +396,12 @@ function trace(graph, options) {
         head.attrs.trace = true;
         doneNodes[headName] = true;
 
-        for (e = 0; e < edges[headName].length; e += 1) {
-            edge = edges[headName][e];
-            edge.attrs.trace = true;
-            todoNodes.push(edge.tail);
+        if (edges[headName]) {
+            for (e = 0; e < edges[headName].length; e += 1) {
+                edge = edges[headName][e];
+                edge.attrs.trace = true;
+                todoNodes.push(edge.tail);
+            }
         }
     }
 }