From 6362f60095c9d270bdd104f27e252b571872cf42 Mon Sep 17 00:00:00 2001
From: Kevin Schaaf <kschaaf@google.com>
Date: Wed, 10 Feb 2016 18:02:04 -0800
Subject: [PATCH] Ensure _propertySetter is installed first. Fixes #3063

---
 src/lib/template/templatizer.html | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/lib/template/templatizer.html b/src/lib/template/templatizer.html
index e946f07a99..d06cc4c258 100644
--- a/src/lib/template/templatizer.html
+++ b/src/lib/template/templatizer.html
@@ -298,6 +298,9 @@
     // values (_propertySetter back on instance once accessor is installed)
     _extendTemplate: function(template, proto) {
       var n$ = Object.getOwnPropertyNames(proto);
+      if (proto._propertySetter) {
+        template._propertySetter = proto._propertySetter;
+      }
       for (var i=0, n; (i<n$.length) && (n=n$[i]); i++) {
         var val = template[n];
         var pd = Object.getOwnPropertyDescriptor(proto, n);