From 8d1542f7fa4a3b32cc93634e19f181ebae967257 Mon Sep 17 00:00:00 2001
From: imaPheven <ima@codenalldaylong.com>
Date: Tue, 5 Sep 2017 21:24:12 -0700
Subject: [PATCH] Null check on socket

on error, the detach method is being called and when the close event is raised from _tls_wrap, it calls detach but the socket is already detached and is null.
---
 lib/poplib.js | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/lib/poplib.js b/lib/poplib.js
index 17a83ad..62464ee 100644
--- a/lib/poplib.js
+++ b/lib/poplib.js
@@ -100,9 +100,11 @@ function POP3Client(port, host, options) {
     var checkResp = true;
     var err = null;
     var detach = function() {
+     if (socket !== null) {
       socket.removeAllListeners("data");
       socket.removeAllListeners("error");
       socket.removeAllListeners("close");
+     }
     };
 
     socket.on("data", function(data) {
@@ -640,4 +642,4 @@ POP3Client.prototype.quit = function(cb) {
   });
 };
 
-module.exports = POP3Client;
\ No newline at end of file
+module.exports = POP3Client;