From a6a4620374691ae03de0ec2d79d6b027bc788cf6 Mon Sep 17 00:00:00 2001
From: HirokiUchikawa <hiroki.uchikawa.gb@hitachi.com>
Date: Fri, 20 Jul 2018 17:03:23 +0900
Subject: [PATCH] Fix an error that occurs when evaluating `null` on `isEmpty`
 rule.

---
 nodes/core/logic/10-switch.js | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/nodes/core/logic/10-switch.js b/nodes/core/logic/10-switch.js
index e7f5cc841..89593047e 100644
--- a/nodes/core/logic/10-switch.js
+++ b/nodes/core/logic/10-switch.js
@@ -34,7 +34,7 @@ module.exports = function(RED) {
         'empty': function(a) {
             if (typeof a === 'string' || Array.isArray(a) || Buffer.isBuffer(a)) {
                 return a.length === 0;
-            } else if (typeof a === 'object') {
+            } else if (typeof a === 'object' && a !== null) {
                 return Object.keys(a).length === 0;
             }
             return false;
@@ -42,7 +42,7 @@ module.exports = function(RED) {
         'nempty': function(a) {
             if (typeof a === 'string' || Array.isArray(a) || Buffer.isBuffer(a)) {
                 return a.length !== 0;
-            } else if (typeof a === 'object') {
+            } else if (typeof a === 'object' && a !== null) {
                 return Object.keys(a).length !== 0;
             }
             return false;