From 4a030d2f9c812b2dd0237883b072189feccac9b7 Mon Sep 17 00:00:00 2001
From: Anthony Zhang <me@anthonyz.ca>
Date: Fri, 9 Nov 2018 11:19:38 -0500
Subject: [PATCH] Fix synchronization issue in SocketIO (#213)

---
 socketio/base_manager.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/socketio/base_manager.py b/socketio/base_manager.py
index b4bcf5f..f8aa998 100644
--- a/socketio/base_manager.py
+++ b/socketio/base_manager.py
@@ -71,7 +71,7 @@ class BaseManager(object):
         if namespace not in self.rooms:
             return
         rooms = []
-        for room_name, room in six.iteritems(self.rooms[namespace]):
+        for room_name, room in six.iteritems(self.rooms[namespace].copy()):
             if sid in room:
                 rooms.append(room_name)
         for room in rooms: