From 7096108d91430f993011f4f47888ff9d8414cbcd Mon Sep 17 00:00:00 2001
From: "Guilherme S. Salustiano" <guissalustiano@gmail.com>
Date: Fri, 26 Jan 2024 20:57:52 +0100
Subject: [PATCH] valley free always have one graph

---
 src/lib.rs | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/lib.rs b/src/lib.rs
index dd7dd61..fd57349 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -249,6 +249,7 @@ impl Topology {
         let mut up_seen = Vec::new();
 
         // add first
+        topo.graph.add_node(asn);
         up_path_queue.push(asn);
 
         while !up_path_queue.is_empty() {