From 7919ebf9a8994d2c5c4f0479859966db6da28624 Mon Sep 17 00:00:00 2001
From: Paul Z <info@pfz4.de>
Date: Sun, 27 Aug 2023 23:24:20 +0200
Subject: [PATCH] fix error on src not existing

---
 src/relation_set.rs | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/src/relation_set.rs b/src/relation_set.rs
index 217cd2e..c35ca8c 100644
--- a/src/relation_set.rs
+++ b/src/relation_set.rs
@@ -119,7 +119,11 @@ impl RelationSet {
         let src = src.into();
         let dst = dst.into();
 
-        let src = self.nodes.read().await.get(&src).unwrap().clone();
+        let src = if let Some(src) = self.nodes.read().await.get(&src) {
+            src.clone()
+        } else {
+            return false;
+        };
 
         let src_neighbors = src
             .edges_out