From 996dd74157248e78e3d039f2e68e70d366244aaf Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Marco=20Trevisan=20=28Trevi=C3=B1o=29?= <mail@3v1n0.net>
Date: Thu, 28 Jun 2018 16:51:48 +0200
Subject: [PATCH] layoutManager: Return null monitor if focusIndex is invalid

https://bugzilla.gnome.org/show_bug.cgi?id=788882
---
 js/ui/layout.js | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/js/ui/layout.js b/js/ui/layout.js
index 6f810395d..dcffe479c 100644
--- a/js/ui/layout.js
+++ b/js/ui/layout.js
@@ -557,6 +557,8 @@ var LayoutManager = new Lang.Class({
     },
 
     get focusMonitor() {
+        if (this.focusIndex < 0)
+            return null;
         return this.monitors[this.focusIndex];
     },