From d524d10bb72686526307f4d79608634aea31113e Mon Sep 17 00:00:00 2001
From: Piotr Kaminski <piotr@ideanest.com>
Date: Mon, 3 Oct 2016 23:30:08 -0700
Subject: [PATCH] Fix conflated prototype chains when extending.

---
 src/core.js           | 2 +-
 test/lib-base-test.js | 6 ++++++
 2 files changed, 7 insertions(+), 1 deletion(-)

diff --git a/src/core.js b/src/core.js
index 22711eb..c318ca7 100644
--- a/src/core.js
+++ b/src/core.js
@@ -48,7 +48,7 @@ var CryptoJS = CryptoJS || (function (Math, undefined) {
                 }
 
                 // Create default initializer
-                if (!subtype.hasOwnProperty('init')) {
+                if (!subtype.hasOwnProperty('init') || this.init === subtype.init) {
                     subtype.init = function () {
                         subtype.$super.init.apply(this, arguments);
                     };
diff --git a/test/lib-base-test.js b/test/lib-base-test.js
index 8d3c715..ed8e642 100644
--- a/test/lib-base-test.js
+++ b/test/lib-base-test.js
@@ -81,6 +81,12 @@ YUI.add('lib-base-test', function (Y) {
             this.data.obj.initArg = 'newValue';
 
             Y.Assert.areNotEqual(this.data.obj.initArg, this.data.objClone.initArg);
+        },
+
+        testCloneLeavesOriginalInitPrototypeUnchanged: function() {
+            Y.Assert.areEqual(this.data.obj, this.data.obj.init.prototype);
+            Y.Assert.areEqual(this.data.objClone, this.data.objClone.init.prototype);
+            Y.Assert.areNotEqual(this.data.obj.init.prototype, this.data.objClone.init.prototype);
         }
     }));
 }, '$Rev$');