From 9a67fec48a3ac76659ae0749bad11dc423abc389 Mon Sep 17 00:00:00 2001
From: John-David Dalton <john.david.dalton@gmail.com>
Date: Wed, 27 Jul 2016 11:41:33 -0700
Subject: [PATCH] Remove `stack.delete` from `baseMergeDeep`.

---
 lodash.js | 1 -
 1 file changed, 1 deletion(-)

diff --git a/lodash.js b/lodash.js
index 90883f2e5..fa7907a5f 100644
--- a/lodash.js
+++ b/lodash.js
@@ -3412,7 +3412,6 @@
         // Recursively merge objects and arrays (susceptible to call stack limits).
         stack.set(srcValue, newValue);
         mergeFunc(newValue, srcValue, srcIndex, customizer, stack);
-        stack['delete'](srcValue);
       }
       assignMergeValue(object, key, newValue);
     }