From 0c0f0d6c93ff5fa1410ffcfb279335a5352ebcd9 Mon Sep 17 00:00:00 2001
From: Volodymyr Bezobiuk <dedoogun@gmail.com>
Date: Mon, 28 Nov 2016 14:16:14 +0200
Subject: [PATCH] fix 'rpl_whoischannels' exception with Slack IRC gateway

---
 lib/irc.js | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/lib/irc.js b/lib/irc.js
index 23ccfe08..2b58d418 100644
--- a/lib/irc.js
+++ b/lib/irc.js
@@ -411,7 +411,8 @@ function Client(server, nick, opt) {
                 break;
             case 'rpl_whoischannels':
                // TODO - clean this up?
-                self._addWhoisData(message.args[1], 'channels', message.args[2].trim().split(/\s+/));
+                self._addWhoisData(message.args[1], 'channels',
+                  (message.args[2] || '').trim().split(/\s+/));
                 break;
             case 'rpl_whoisserver':
                 self._addWhoisData(message.args[1], 'server', message.args[2]);