From ac62cc0f7d8d85a91626d47c006cc70f1cfafe9e Mon Sep 17 00:00:00 2001
From: Wesley Cho <wesley.cho@gmail.com>
Date: Mon, 1 May 2017 09:22:11 -0700
Subject: [PATCH] fix(middleware): change to use vanilla for loop

- Change use of for..in to plain for loop due to issues where array prototype is modified

Fixes #2671
---
 lib/middleware/karma.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/middleware/karma.js b/lib/middleware/karma.js
index 831668324..04dd47a3f 100644
--- a/lib/middleware/karma.js
+++ b/lib/middleware/karma.js
@@ -174,7 +174,7 @@ var createKarmaMiddleware = function (
 
           var scriptTags = []
           var scriptUrls = []
-          for (var i in files.included) {
+          for (var i = 0; i < files.included.length; i++) {
             var file = files.included[i]
             var filePath = file.path
             var fileExt = path.extname(filePath)