From bad006f2e1b3117c431611eb352a1254f7d03e2d Mon Sep 17 00:00:00 2001
From: James Lal <james@silklabs.com>
Date: Thu, 31 Mar 2016 14:16:30 -0700
Subject: [PATCH] zlib: fix use after null when calling .close

An internal zlib error may cause _handle to be set to null.
Close now will check if there is a _handle prior to calling .close on
it.

PR-URL: https://github.com/nodejs/node/pull/5982
Fixes: https://github.com/nodejs/node/issues/6034
Reviewed-By: Brian White <mscdex@mscdex.net>
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
---
 lib/zlib.js | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/lib/zlib.js b/lib/zlib.js
index 029c13a5f47cc6..d5c82f2fbba9ab 100644
--- a/lib/zlib.js
+++ b/lib/zlib.js
@@ -469,7 +469,9 @@ Zlib.prototype.close = function(callback) {
 
   this._closed = true;
 
-  this._handle.close();
+  if (this._handle) {
+    this._handle.close();
+  }
 
   process.nextTick(emitCloseNT, this);
 };