From 7cd418d38e472563d8df6546b3227dcfafe3e145 Mon Sep 17 00:00:00 2001
From: David Baker <dave@matrix.org>
Date: Fri, 22 Jan 2016 13:40:37 +0000
Subject: [PATCH] Don't add the member functiopn if we're not using treecache

---
 synapse/util/caches/lrucache.py | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/synapse/util/caches/lrucache.py b/synapse/util/caches/lrucache.py
index cc6c25a71..e6a66dc04 100644
--- a/synapse/util/caches/lrucache.py
+++ b/synapse/util/caches/lrucache.py
@@ -17,6 +17,8 @@
 from functools import wraps
 import threading
 
+from synapse.util.caches.treecache import TreeCache
+
 
 def enumerate_leaves(node, depth):
     if depth == 0:
@@ -154,7 +156,8 @@ class LruCache(object):
         self.set = cache_set
         self.setdefault = cache_set_default
         self.pop = cache_pop
-        self.del_multi = cache_del_multi
+        if cache_type is TreeCache:
+            self.del_multi = cache_del_multi
         self.len = cache_len
         self.contains = cache_contains
         self.clear = cache_clear