From 6d3b250dca285082c16a3683144217c9ad570189 Mon Sep 17 00:00:00 2001
From: "Krueger, Marko" <marko.krueger@mdc-berlin.de>
Date: Mon, 24 Apr 2017 08:58:03 +0200
Subject: [PATCH] [BUGFIX release] Fixes #15154

Usage of `Array#includes` is not supported by IE11.
---
 packages/ember-metal/lib/error_handler.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/packages/ember-metal/lib/error_handler.js b/packages/ember-metal/lib/error_handler.js
index 7cdd54f4196..cc157167b89 100644
--- a/packages/ember-metal/lib/error_handler.js
+++ b/packages/ember-metal/lib/error_handler.js
@@ -6,7 +6,7 @@ let getStack = error => {
   let stack = error.stack;
   let message = error.message;
 
-  if (stack && !stack.includes(message)) {
+  if (stack && stack.indexOf(message) === -1) {
     stack = `${message}\n${stack}`;
   }