From 09132c3a811b7ffda910adbd7f9e12fecef8a9dc Mon Sep 17 00:00:00 2001
From: Adrian Marte <112816+Pwndrian@users.noreply.github.com>
Date: Tue, 18 Jul 2023 09:34:28 +0200
Subject: [PATCH] Wait until server is closed before invoking callback

---
 lib/portfinder.js | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/lib/portfinder.js b/lib/portfinder.js
index 2bc65e2..2ee2ec8 100644
--- a/lib/portfinder.js
+++ b/lib/portfinder.js
@@ -39,8 +39,10 @@ internals.testPort = function(options, callback) {
     debugTestPort("done w/ testPort(): OK", options.host, "port", options.port);
 
     options.server.removeListener('error', onError);
-    options.server.close();
-    callback(null, options.port);
+    options.server.close(function () {
+      debugTestPort("done w/ testPort(): Server closed", options.host, "port", options.port);
+      callback(null, options.port);
+    });
   }
 
   function onError (err) {