From eaaa837e002fa068f23b04b140d538e91ccc2eab Mon Sep 17 00:00:00 2001
From: Erik Johnston <erik@matrix.org>
Date: Thu, 5 Oct 2017 11:43:22 +0100
Subject: [PATCH] Don't corrupt cache

---
 synapse/groups/groups_server.py | 1 +
 1 file changed, 1 insertion(+)

diff --git a/synapse/groups/groups_server.py b/synapse/groups/groups_server.py
index 10bf61d178..991cc12cce 100644
--- a/synapse/groups/groups_server.py
+++ b/synapse/groups/groups_server.py
@@ -109,6 +109,7 @@ class GroupsServerHandler(object):
                 room_id, len(joined_users),
                 with_alias=False, allow_private=True,
             )
+            entry = dict(entry)  # so we don't change whats cached
             entry.pop("room_id", None)
 
             room_entry["profile"] = entry