From ab6210dc3088a61d8116a43b721f512a404558f7 Mon Sep 17 00:00:00 2001
From: John-David Dalton <john.david.dalton@gmail.com>
Date: Thu, 16 Jul 2015 09:50:41 -0700
Subject: [PATCH] Avoid es-sham `getPrototypeOf` when constructor is not a
 function.

---
 lodash.src.js | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/lodash.src.js b/lodash.src.js
index 3f9dcc1f9..ed54ebcba 100644
--- a/lodash.src.js
+++ b/lodash.src.js
@@ -8256,7 +8256,10 @@
       if (!(value && objToString.call(value) == objectTag)) {
         return false;
       }
-      var proto = getPrototypeOf(value);
+      var proto = typeof value.constructor == 'function'
+        ? getPrototypeOf(value)
+        : objectProto;
+
       if (proto === null) {
         return true;
       }