From 97f33d292da9847c0f98a29c2d0dadc84f85242c Mon Sep 17 00:00:00 2001
From: Danny Larsen <danny@forecast.it>
Date: Wed, 9 Aug 2017 20:41:29 +0200
Subject: [PATCH] Bug fix for null parent (#3342)

---
 lib/timeline/component/item/Item.js | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/lib/timeline/component/item/Item.js b/lib/timeline/component/item/Item.js
index 9dd4e055..551ffc35 100644
--- a/lib/timeline/component/item/Item.js
+++ b/lib/timeline/component/item/Item.js
@@ -64,7 +64,10 @@ Item.prototype.setData = function(data) {
   if (groupChanged && this.parent != null) {
     this.parent.itemSet._moveToGroup(this, data.group);
   }
-  this.parent.stackDirty = true;
+  
+  if (this.parent) {
+    this.parent.stackDirty = true;
+  }
   
   var subGroupChanged = data.subgroup != undefined && this.data.subgroup != data.subgroup;
   if (subGroupChanged && this.parent != null) {