From e5937638d44f31955afb992dce2ad08781708651 Mon Sep 17 00:00:00 2001
From: Benjamin Sergeant <bsergean@gmail.com>
Date: Tue, 1 Jan 2019 16:14:46 -0800
Subject: [PATCH] crash when server failed to start

---
 ixwebsocket/IXWebSocketServer.cpp | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/ixwebsocket/IXWebSocketServer.cpp b/ixwebsocket/IXWebSocketServer.cpp
index 996fa497..3778f09e 100644
--- a/ixwebsocket/IXWebSocketServer.cpp
+++ b/ixwebsocket/IXWebSocketServer.cpp
@@ -130,6 +130,8 @@ namespace ix
     // FIXME: we should cancel all the async per connections tasks
     void WebSocketServer::stop()
     {
+        if (!_thread.joinable()) return; // nothing to do
+
         _stop = true;
         _thread.join();
         _stop = false;