From 79309f6697725f67521ce2cf8f56d4ebbd53e7a1 Mon Sep 17 00:00:00 2001
From: Ralf Teusner <ralf.teusner@hpi.de>
Date: Thu, 28 Jul 2016 15:49:23 +0200
Subject: [PATCH] prevent printing out "undefined" if no container could be
 fetched and thus the response has no stdout or stderr.

---
 app/assets/javascripts/editor.js.erb | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/app/assets/javascripts/editor.js.erb b/app/assets/javascripts/editor.js.erb
index d173198f..2d73bbf0 100644
--- a/app/assets/javascripts/editor.js.erb
+++ b/app/assets/javascripts/editor.js.erb
@@ -604,11 +604,11 @@ $(function() {
     //    output_mode_is_streaming = false;
     //}
     if (!colorize) {
-      if(output.stdout != ''){
+      if(output.stdout != undefined && output.stdout != ''){
         element.append(output.stdout)
       }
 
-      if(output.stderr != ''){
+      if(output.stderr != undefined && output.stderr != ''){
         element.append('There was an error: StdErr: ' + output.stderr);
       }