From 37f3ed08e55704012b5c3b7b9e77b684c28d81b2 Mon Sep 17 00:00:00 2001
From: Michael Merickel <michael@merickel.org>
Date: Fri, 17 Apr 2015 23:13:14 -0500
Subject: default response_callback and finished_callback to an empty deque
 instead of None

fixes #1600
---
 CHANGES.txt | 4 ++++
 1 file changed, 4 insertions(+)

(limited to 'CHANGES.txt')

diff --git a/CHANGES.txt b/CHANGES.txt
index a9e159275..87e9f1f3a 100644
--- a/CHANGES.txt
+++ b/CHANGES.txt
@@ -191,6 +191,10 @@ Bug Fixes
 - Avoiding timing attacks against CSRF tokens.
   See https://github.com/Pylons/pyramid/pull/1574
 
+- ``request.finished_callbacks`` and ``request.response_callbacks`` now
+  default to an iterable instead of ``None``. It may be checked for a length
+  of 0. This was the behavior in 1.5.
+
 Deprecations
 ------------
 
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