From 629de594d55064fa3d23e8cfca9046de1c93de3b Mon Sep 17 00:00:00 2001
From: John-David Dalton <john.david.dalton@gmail.com>
Date: Sat, 27 Feb 2016 10:15:51 -0800
Subject: [PATCH] Avoid deep cloning source values if a `customizer` is
 provided.

---
 lodash.js | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/lodash.js b/lodash.js
index 3496f8a1f..1a488d429 100644
--- a/lodash.js
+++ b/lodash.js
@@ -3184,7 +3184,7 @@
           }
           else {
             isCommon = false;
-            newValue = baseClone(srcValue, true);
+            newValue = baseClone(srcValue, !customizer);
           }
         }
         else if (isPlainObject(srcValue) || isArguments(srcValue)) {
@@ -3193,7 +3193,7 @@
           }
           else if (!isObject(objValue) || (srcIndex && isFunction(objValue))) {
             isCommon = false;
-            newValue = baseClone(srcValue, true);
+            newValue = baseClone(srcValue, !customizer);
           }
           else {
             newValue = objValue;