From 1a3f786b8a56dfe58fedc482354c6831e06b72ba Mon Sep 17 00:00:00 2001
From: Uli Fahrer <mail@uli-fahrer.de>
Date: Sat, 7 Jan 2017 15:54:33 +0100
Subject: [PATCH] Fix tooltip issue causing exception when node becomes cluster

---
 lib/network/modules/InteractionHandler.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/network/modules/InteractionHandler.js b/lib/network/modules/InteractionHandler.js
index 4d61d5a1..3f7a139d 100644
--- a/lib/network/modules/InteractionHandler.js
+++ b/lib/network/modules/InteractionHandler.js
@@ -694,7 +694,7 @@ class InteractionHandler {
         // we initially only check stillOnObj because this is much faster.
         if (stillOnObj === true) {
           let overNode = this.selectionHandler.getNodeAt(pointer);
-          stillOnObj = overNode.id === this.popup.popupTargetId;
+          stillOnObj = overNode === undefined ? false : overNode.id === this.popup.popupTargetId;
         }
       }
     }