From 023fde82f959343f06e65b135367dcd096499e7e Mon Sep 17 00:00:00 2001
From: "Namhyeon, Go" <gnh1201@gmail.com>
Date: Wed, 28 Apr 2021 11:08:44 +0900
Subject: [PATCH] [Fix] in WSH, `Object.getPrototypeOf([].values())` is falsy

Closes https://github.com/es-shims/es5-shim/issues/476.
---
 es6-shim.js | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/es6-shim.js b/es6-shim.js
index 0d99719a..45458836 100644
--- a/es6-shim.js
+++ b/es6-shim.js
@@ -1268,7 +1268,10 @@
   // Chrome defines keys/values/entries on Array, but doesn't give us
   // any way to identify its iterator.  So add our own shimmed field.
   if (Object.getPrototypeOf) {
-    addIterator(Object.getPrototypeOf([].values()));
+    var ChromeArrayIterator = Object.getPrototypeOf([].values());
+    if (ChromeArrayIterator) { // in WSH, this is `undefined`
+      addIterator(ChromeArrayIterator);
+    }
   }
 
   // note: this is positioned here because it relies on Array#entries