From b68cc5cdde704d964883d7e5f4575a6bead95203 Mon Sep 17 00:00:00 2001
From: Matt Sergeant <matt@sergeant.org>
Date: Sun, 25 Jun 2017 20:45:48 -0400
Subject: [PATCH] async-hooks,net: ensure asyncId=null if no handle

If the .listen() hasn't been called on the server, there is no handle
object. In this case use null as the triggerAsyncId.

Fixes: https://github.com/nodejs/node/issues/13548
---
 lib/net.js                               |  3 ++-
 test/async-hooks/test-get-connections.js | 14 ++++++++++++++
 2 files changed, 16 insertions(+), 1 deletion(-)
 create mode 100644 test/async-hooks/test-get-connections.js

diff --git a/lib/net.js b/lib/net.js
index 5f4eec89ec87b9..5129a596421e1c 100644
--- a/lib/net.js
+++ b/lib/net.js
@@ -1558,7 +1558,8 @@ Server.prototype.getConnections = function(cb) {
   const self = this;
 
   function end(err, connections) {
-    nextTick(self[async_id_symbol], cb, err, connections);
+    const asyncId = self._handle ? self[async_id_symbol] : null;
+    nextTick(asyncId, cb, err, connections);
   }
 
   if (!this._usingSlaves) {
diff --git a/test/async-hooks/test-get-connections.js b/test/async-hooks/test-get-connections.js
new file mode 100644
index 00000000000000..16925536ef5c43
--- /dev/null
+++ b/test/async-hooks/test-get-connections.js
@@ -0,0 +1,14 @@
+'use strict';
+
+const assert = require('assert');
+const net = require('net');
+const server = net.createServer();
+
+try {
+    server.getConnections(() => {
+        assert.ok(true, "No error thrown")
+    });
+}
+catch (e) {
+    assert.ok(false, "getConnections threw an error");
+}