From 9c0e23144c778703b14fbc840d66855a8a954440 Mon Sep 17 00:00:00 2001
From: Alan Knowles <alan@roojs.com>
Date: Thu, 12 Mar 2020 15:57:14 +0800
Subject: [PATCH] length as a mixedcollection key confuses things...

---
 Roo/util/MixedCollection.js | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/Roo/util/MixedCollection.js b/Roo/util/MixedCollection.js
index f1f98cb40d..2a251eed1c 100644
--- a/Roo/util/MixedCollection.js
+++ b/Roo/util/MixedCollection.js
@@ -323,6 +323,9 @@ mc.add(otherEl);
  * @return {Object} The item associated with the passed key.
  */
     item : function(key){
+        if (key === 'length') {
+            return null;
+        }
         var item = typeof this.map[key] != "undefined" ? this.map[key] : this.items[key];
         return typeof item != 'function' || this.allowFunctions ? item : null; // for prototype!
     },
-- 
2.39.2