From 84d2d3feb3cb4a1226a0bb22be9653f6555131a2 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Marco=20Trevisan=20=28Trevi=C3=B1o=29?= <mail@3v1n0.net>
Date: Wed, 18 Apr 2018 08:08:54 +0200
Subject: [PATCH] keyboard: Check monitor validity before deferencing it

Monitor could be invalid in headless mode.

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

diff --git a/js/ui/keyboard.js b/js/ui/keyboard.js
index 96da88781..3087cefa5 100644
--- a/js/ui/keyboard.js
+++ b/js/ui/keyboard.js
@@ -1148,7 +1148,7 @@ var Keyboard = new Lang.Class({
             let windowActor = window.get_compositor_private();
             let delta = 0;
 
-            if (frameRect.y + y + h >= monitor.height - keyboardHeight)
+            if (monitor && frameRect.y + y + h >= monitor.height - keyboardHeight)
                 delta = keyboardHeight;
 
             this._animateWindow(window, true, delta);