From 066f82f4b12b646c9ca140ebcf2c004f929a3d88 Mon Sep 17 00:00:00 2001
From: Ed Sanders <esanders@wikimedia.org>
Date: Wed, 6 Jul 2016 17:12:08 +0100
Subject: [PATCH] Check surface exists when triggering toc rebuild

Bug: T139205
Change-Id: I9cc01c3dc2e9bcd822d5498b2a95d01cc4e82953
---
 modules/ve-mw/ce/nodes/ve.ce.MWHeadingNode.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/modules/ve-mw/ce/nodes/ve.ce.MWHeadingNode.js b/modules/ve-mw/ce/nodes/ve.ce.MWHeadingNode.js
index f2a952df42..8154c21da6 100644
--- a/modules/ve-mw/ce/nodes/ve.ce.MWHeadingNode.js
+++ b/modules/ve-mw/ce/nodes/ve.ce.MWHeadingNode.js
@@ -46,7 +46,7 @@ ve.ce.MWHeadingNode.prototype.onTeardown = function () {
 };
 
 ve.ce.MWHeadingNode.prototype.rebuildToc = function () {
-	if ( this.surface.mwTocWidget ) {
+	if ( this.surface && this.surface.mwTocWidget ) {
 		this.surface.mwTocWidget.rebuild();
 	}
 };