From 45afd019de9a541e6396e66c7657d9113710c929 2015-06-20 19:07:18
From: Sylvain Corlay <sylvain.corlay@gmail.com>
Date: 2015-06-20 19:07:18
Subject: [PATCH] Save changes should only save if comm is live

---

diff --git a/IPython/html/static/widgets/js/widget.js b/IPython/html/static/widgets/js/widget.js
index e5f758d..4ce2a04 100644
--- a/IPython/html/static/widgets/js/widget.js
+++ b/IPython/html/static/widgets/js/widget.js
@@ -314,7 +314,9 @@ define(["widgets/js/manager",
              *
              * This invokes a Backbone.Sync.
              */
-            this.save(this._buffered_state_diff, {patch: true, callbacks: callbacks});
+            if (this.comm_live) {
+                this.save(this._buffered_state_diff, {patch: true, callbacks: callbacks});
+            }
         },
 
         _pack_models: function(value) {