From 559c51debcf5402cd5999aa1afb854b34e9de363 Mon Sep 17 00:00:00 2001
From: Mark Haines <mark.haines@matrix.org>
Date: Mon, 10 Aug 2015 14:07:08 +0100
Subject: [PATCH] Use TypeError instead of ValueError and give a nicer error
 mesasge when someone calls Cache.invalidate with the wrong type.

---
 synapse/storage/_base.py | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/synapse/storage/_base.py b/synapse/storage/_base.py
index e76ee2779..73eea157a 100644
--- a/synapse/storage/_base.py
+++ b/synapse/storage/_base.py
@@ -116,7 +116,9 @@ class Cache(object):
     def invalidate(self, key):
         self.check_thread()
         if not isinstance(key, tuple):
-            raise ValueError("keyargs must be a tuple.")
+            raise TypeError(
+                "The cache key must be a tuple not %r" % (type(key),)
+            )
 
         # Increment the sequence number so that any SELECT statements that
         # raced with the INSERT don't update the cache (SYN-369)