From 209c83c4f60447351e1343d98652459f2a3d0d45 Mon Sep 17 00:00:00 2001
From: Jean-Paul Calderone <exarkun@twistedmatrix.com>
Date: Mon, 10 Jan 2022 21:14:53 -0500
Subject: [PATCH] link to twisted tickets related to this

---
 src/_zkapauthorizer/controller.py | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/_zkapauthorizer/controller.py b/src/_zkapauthorizer/controller.py
index 8823406..f58192b 100644
--- a/src/_zkapauthorizer/controller.py
+++ b/src/_zkapauthorizer/controller.py
@@ -52,6 +52,10 @@ from .model import Voucher
 RETRY_INTERVAL = timedelta(milliseconds=1000)
 
 
+# It would be nice to have frozen exception types but Failure.cleanFailure
+# interacts poorly with these.
+# https://twistedmatrix.com/trac/ticket/9641
+# https://twistedmatrix.com/trac/ticket/9771
 @attr.s(auto_attribs=True)
 class UnexpectedResponse(Exception):
     """
-- 
GitLab