From f17817f24394f0e3b481168bd51eca40a97e1ec0 Mon Sep 17 00:00:00 2001
From: Marcel Breitenfellner <marcel.breitenfellner@dynatrace.com>
Date: Fri, 15 Jul 2022 12:51:33 +0200
Subject: [PATCH] Fixed async array mutation on stop

---
 Xcode/Sources/HttpServerIO.swift | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/Xcode/Sources/HttpServerIO.swift b/Xcode/Sources/HttpServerIO.swift
index 65c6e95a..9969abdb 100644
--- a/Xcode/Sources/HttpServerIO.swift
+++ b/Xcode/Sources/HttpServerIO.swift
@@ -100,11 +100,11 @@ open class HttpServerIO {
     public func stop() {
         guard self.operating else { return }
         self.state = .stopping
-        // Shutdown connected peers because they can live in 'keep-alive' or 'websocket' loops.
-        for socket in self.sockets {
-            socket.close()
-        }
         self.queue.sync {
+            // Shutdown connected peers because they can live in 'keep-alive' or 'websocket' loops.
+            for socket in self.sockets {
+                socket.close()
+            }
             self.sockets.removeAll(keepingCapacity: true)
         }
         socket.close()