From 962672564eba014b299a15193fcfa244ec036008 Mon Sep 17 00:00:00 2001
From: Steve-Mcl <sdmclaughlin@gmail.com>
Date: Wed, 6 Jul 2022 15:17:58 +0100
Subject: [PATCH] prevent exception generating tooltip for deleted nodes

---
 .../@node-red/editor-client/src/js/ui/view.js        | 12 +++++++++++-
 1 file changed, 11 insertions(+), 1 deletion(-)

diff --git a/packages/node_modules/@node-red/editor-client/src/js/ui/view.js b/packages/node_modules/@node-red/editor-client/src/js/ui/view.js
index 70583d741..5a9df8ed7 100755
--- a/packages/node_modules/@node-red/editor-client/src/js/ui/view.js
+++ b/packages/node_modules/@node-red/editor-client/src/js/ui/view.js
@@ -3293,11 +3293,17 @@ RED.view = (function() {
 
         if (active && ((portType === PORT_TYPE_INPUT && ((d._def && d._def.inputLabels)||d.inputLabels)) || (portType === PORT_TYPE_OUTPUT && ((d._def && d._def.outputLabels)||d.outputLabels)))) {
             portLabelHoverTimeout = setTimeout(function() {
+                const n = port && port.node()
+                const nId = n && n.__data__ && n.__data__.id
+                //check see if node has been deleted since timeout started
+                if(!n || !n.parentNode || !RED.nodes.node(n.__data__.id)) {
+                    return; //node is gone!
+                }
                 var tooltip = getPortLabel(d,portType,portIndex);
                 if (!tooltip) {
                     return;
                 }
-                var pos = getElementPosition(port.node());
+                var pos = getElementPosition(n);
                 portLabelHoverTimeout = null;
                 portLabelHover = showTooltip(
                     (pos[0]+(portType===PORT_TYPE_INPUT?-2:12)),
@@ -3734,6 +3740,10 @@ RED.view = (function() {
             if (d.hasOwnProperty('l')?!d.l : (d.type === "link in" || d.type === "link out")) {
                 var parentNode = this.parentNode;
                 portLabelHoverTimeout = setTimeout(function() {
+                    //check see if node has been deleted since timeout started
+                    if(!parentNode || !parentNode.parentNode || !RED.nodes.node(parentNode.id)) {
+                        return; //node is gone!
+                    }
                     var tooltip;
                     if (d._def.label) {
                         tooltip = d._def.label;