From a0505afb23a63b39bf81ed7b4fa27ccaef3996d1 Mon Sep 17 00:00:00 2001
From: Alasdair Smith <ali@alasdairsmith.co.uk>
Date: Fri, 22 Sep 2017 09:34:10 +0100
Subject: [PATCH] Be defensive on comment text

---
 services/real-time/app/coffee/WebsocketController.coffee | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/services/real-time/app/coffee/WebsocketController.coffee b/services/real-time/app/coffee/WebsocketController.coffee
index 63c3ff903a..53ccecd51b 100644
--- a/services/real-time/app/coffee/WebsocketController.coffee
+++ b/services/real-time/app/coffee/WebsocketController.coffee
@@ -106,7 +106,7 @@ module.exports = WebsocketController =
 					if options.encodeRanges
 						try
 							for comment in ranges?.comments or []
-								comment.op.c = encodeForWebsockets(comment.op.c)
+								comment.op.c = encodeForWebsockets(comment.op.c) if comment.op.c?
 							for change in ranges?.changes or []
 								change.op.i = encodeForWebsockets(change.op.i) if change.op.i?
 								change.op.d = encodeForWebsockets(change.op.d) if change.op.d?