From 120020b4dbf16d2203efda7d623a1a8308813825 Mon Sep 17 00:00:00 2001
From: John-David Dalton <john.david.dalton@gmail.com>
Date: Wed, 17 Sep 2014 12:34:19 -0700
Subject: [PATCH] Avoid `toObject` in the `shimKeys` path of `_.keys`.

---
 lodash.js | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/lodash.js b/lodash.js
index 0a4a0b36e..f80d09a54 100644
--- a/lodash.js
+++ b/lodash.js
@@ -7623,8 +7623,9 @@
      * // => ['x', 'y'] (iteration order is not guaranteed)
      */
     var keys = !nativeKeys ? shimKeys : function(object) {
-      object = toObject(object);
-
+      if (object == null) {
+        return [];
+      }
       var Ctor = object.constructor,
           length = object.length;
 
@@ -7633,7 +7634,7 @@
           (support.enumPrototypes && typeof object == 'function')) {
         return shimKeys(object);
       }
-      return nativeKeys(object);
+      return nativeKeys(toObject(object));
     };
 
     /**