From ab9673757f5e96de8998cb02e2bd9acdb60b7549 Mon Sep 17 00:00:00 2001
From: Sebastian Serth <Sebastian.Serth@hpi.de>
Date: Thu, 29 Oct 2020 12:35:31 +0100
Subject: [PATCH] Check for undefined in isActiveFileRenderable

---
 app/assets/javascripts/editor/editor.js.erb | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/app/assets/javascripts/editor/editor.js.erb b/app/assets/javascripts/editor/editor.js.erb
index c64ef3ee..4b4c8810 100644
--- a/app/assets/javascripts/editor/editor.js.erb
+++ b/app/assets/javascripts/editor/editor.js.erb
@@ -414,6 +414,9 @@ var CodeOceanEditor = {
     },
 
     isActiveFileRenderable: function () {
+        if (this.active_frame.data() === undefined) {
+            return false;
+        }
         return 'renderable' in this.active_frame.data();
     },