From 1a5dc6a3e7b40376e4360787daf6da472f976238 Mon Sep 17 00:00:00 2001
From: Matteo Collina <hello@matteocollina.com>
Date: Sat, 2 Mar 2019 19:09:44 +0100
Subject: [PATCH] http: check for existance in resetHeadersTimeoutOnReqEnd

socket.parser can be undefined under unknown circumstances.
This is a fix for a bug I cannot reproduce but it is affecting
people.

Fixes: https://github.com/nodejs/node/issues/26366

PR-URL: https://github.com/nodejs/node/pull/26402
Reviewed-By: Richard Lau <riclau@uk.ibm.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
---
 lib/_http_server.js                           |  2 +-
 .../test-http-server-delete-parser.js         | 24 +++++++++++++++++++
 2 files changed, 25 insertions(+), 1 deletion(-)
 create mode 100644 test/parallel/test-http-server-delete-parser.js

diff --git a/lib/_http_server.js b/lib/_http_server.js
index a93e423961c5f6..ee5e196748654c 100644
--- a/lib/_http_server.js
+++ b/lib/_http_server.js
@@ -724,7 +724,7 @@ function resetHeadersTimeoutOnReqEnd() {
   const parser = this.socket.parser;
   // Parser can be null if the socket was destroyed
   // in that case, there is nothing to do.
-  if (parser !== null) {
+  if (parser) {
     parser.parsingHeadersStart = nowDate();
   }
 }
diff --git a/test/parallel/test-http-server-delete-parser.js b/test/parallel/test-http-server-delete-parser.js
new file mode 100644
index 00000000000000..0c5eea90734170
--- /dev/null
+++ b/test/parallel/test-http-server-delete-parser.js
@@ -0,0 +1,24 @@
+'use strict';
+
+const common = require('../common');
+
+const http = require('http');
+
+const server = http.createServer(common.mustCall((req, res) => {
+  res.writeHead(200, { 'Content-Type': 'text/plain' });
+  res.write('okay', common.mustCall(() => {
+    delete res.socket.parser;
+  }));
+  res.end();
+}));
+
+server.listen(1337, '127.0.0.1');
+server.unref();
+
+const req = http.request({
+  port: 1337,
+  host: '127.0.0.1',
+  method: 'GET',
+});
+
+req.end();