From 88a25580390d304099bf1bb16e0bb685130c49f3 Mon Sep 17 00:00:00 2001
From: Sebastian Serth <Sebastian.Serth@hpi.de>
Date: Wed, 11 Nov 2020 17:46:02 +0100
Subject: [PATCH] Check for this.active_frame.data() before accessing

---
 app/assets/javascripts/editor/editor.js.erb | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/app/assets/javascripts/editor/editor.js.erb b/app/assets/javascripts/editor/editor.js.erb
index c3e7ad44..fe3fbf56 100644
--- a/app/assets/javascripts/editor/editor.js.erb
+++ b/app/assets/javascripts/editor/editor.js.erb
@@ -629,10 +629,16 @@ var CodeOceanEditor = {
     },
 
     isActiveFileBinary: function () {
+        if (this.active_frame.data() === undefined) {
+            return false;
+        }
         return 'binary' in this.active_frame.data();
     },
 
     isActiveFileExecutable: function () {
+        if (this.active_frame.data() === undefined) {
+            return false;
+        }
         return 'executable' in this.active_frame.data();
     },