From 81db90833949de4c6999aaa506b10dd18772825d 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 14:51:48 +0000
Subject: [PATCH] layoutManager: Return null monitor if focusIndex is invalid

https://bugzilla.gnome.org/show_bug.cgi?id=788882


(cherry picked from commit 996dd74157248e78e3d039f2e68e70d366244aaf)
---
 js/ui/layout.js | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/js/ui/layout.js b/js/ui/layout.js
index 8f08d3768..e615e566e 100644
--- a/js/ui/layout.js
+++ b/js/ui/layout.js
@@ -558,6 +558,8 @@ var LayoutManager = new Lang.Class({
     },
 
     get focusMonitor() {
+        if (this.focusIndex < 0)
+            return null;
         return this.monitors[this.focusIndex];
     },