From e253f58aac1b88e08e17f59f76ac678d1bba6eac Mon Sep 17 00:00:00 2001
From: John-David Dalton <john.david.dalton@gmail.com>
Date: Sat, 22 Aug 2015 20:09:35 -0700
Subject: [PATCH] Fix `_.keysIn` test fails in IE9.

---
 lodash.js | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/lodash.js b/lodash.js
index c519218ac..be338aa0c 100644
--- a/lodash.js
+++ b/lodash.js
@@ -2189,6 +2189,8 @@
      * @returns {Array} Returns the array of property names.
      */
     function baseKeysIn(object) {
+      object = object == null ? object : Object(object);
+
       var result = [];
       for (var key in object) {
         result.push(key);