From 4fcc049ebb2237274cb064c6a88f774b5db9f938 Mon Sep 17 00:00:00 2001
From: mohamed amr <m_ma7med@hotmail.com>
Date: Thu, 1 Dec 2016 18:58:20 +0200
Subject: [PATCH] fix(copy): angular copy should throw exception when source
 and destination are not the same type

Closes #15444
---
 src/Angular.js | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/Angular.js b/src/Angular.js
index 18672cc99e41..5bbe1d5c45d9 100644
--- a/src/Angular.js
+++ b/src/Angular.js
@@ -820,6 +820,10 @@ function copy(source, destination) {
   var stackDest = [];
 
   if (destination) {
+    if (toString.call(destination) !== toString.call(source)) {
+      throw ngMinErr('cpi', 'Can\'t copy! Source({0} type) and destination({1} type) aren\'t the same type.',
+          toString.call(source), toString.call(destination));
+    }
     if (isTypedArray(destination) || isArrayBuffer(destination)) {
       throw ngMinErr('cpta', 'Can\'t copy! TypedArray destination cannot be mutated.');
     }