From e8d7e65fb9b537c6b50c31b4cd0f419aa897df4c Mon Sep 17 00:00:00 2001
From: Jordan Harband <ljharb@gmail.com>
Date: Sun, 6 Sep 2015 16:26:50 +0900
Subject: [PATCH] Fix `Reflect.defineProperty` on edge v0.12

---
 es6-shim.js | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/es6-shim.js b/es6-shim.js
index f16d4857..339ac336 100644
--- a/es6-shim.js
+++ b/es6-shim.js
@@ -3184,9 +3184,11 @@
     }
   }
   if (globals.Reflect.defineProperty) {
-    if (valueOrFalseIfThrows(function () {
-      globals.Reflect.defineProperty(1, 'test', { value: 1 });
-      return true;
+    if (!valueOrFalseIfThrows(function () {
+      var basic = !globals.Reflect.defineProperty(1, 'test', { value: 1 });
+      // "extensible" fails on Edge 0.12
+      var extensible = typeof Object.preventExtensions !== 'function' || !globals.Reflect.defineProperty(Object.preventExtensions({}), 'test', {});
+      return basic && extensible;
     })) {
       overrideNative(globals.Reflect, 'defineProperty', ReflectShims.defineProperty);
     }