From e9dfbed997977dfa6ec4968a650692fa8cf15c39 Mon Sep 17 00:00:00 2001
From: Brian Ford <btford@umich.edu>
Date: Thu, 12 Jun 2014 12:02:08 -0700
Subject: [PATCH] fix: do not reconfig property descriptors of prototypes

---
 zone.js | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/zone.js b/zone.js
index 27a44d026..dc5b5bde8 100644
--- a/zone.js
+++ b/zone.js
@@ -524,7 +524,9 @@ Zone.patchDefineProperty = function () {
     if (isUnconfigurable(obj, prop)) {
       throw new TypeError('Cannot assign to read only property \'' + prop + '\' of ' + obj);
     }
-    desc = rewriteDescriptor(obj, prop, desc);
+    if (prop !== 'prototype') {
+      desc = rewriteDescriptor(obj, prop, desc);
+    }
     return _defineProperty(obj, prop, desc);
   };