From 4237ed0d927bc84b476a8a563dd319e545bc02d3 Mon Sep 17 00:00:00 2001
From: Erik Little <nuclear.ace@gmail.com>
Date: Mon, 4 Sep 2017 11:53:18 -0400
Subject: [PATCH] Fix queue violation. #792

---
 Source/SocketIO/Client/SocketIOClient.swift | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/Source/SocketIO/Client/SocketIOClient.swift b/Source/SocketIO/Client/SocketIOClient.swift
index c70685b..e487f49 100644
--- a/Source/SocketIO/Client/SocketIOClient.swift
+++ b/Source/SocketIO/Client/SocketIOClient.swift
@@ -155,7 +155,10 @@ open class SocketIOClient : NSObject, SocketIOClientSpec, SocketEngineClient, So
     private func addEngine() {
         DefaultSocketLogger.Logger.log("Adding engine", type: logType, args: "")
 
-        engine?.client = nil
+        engine?.engineQueue.sync {
+            self.engine?.client = nil
+        }
+
         engine = SocketEngine(client: self, url: socketURL, config: config)
     }