From 094e34ecefe7fe24e8d9fbb03198f7a38fcaf1f6 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.
---
 lib/zlib.js | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/lib/zlib.js b/lib/zlib.js
index 79c78ea4a51307..f114ed31063081 100644
--- a/lib/zlib.js
+++ b/lib/zlib.js
@@ -467,7 +467,10 @@ function _close(engine, callback) {
 
   engine._closed = true;
 
-  engine._handle.close();
+  // Caller may invoke .close after a zlib error (which will null _handle).
+  if (engine._handle) {
+    engine._handle.close();
+  }
 }
 
 function emitCloseNT(self) {