From 5d44c08f1c18583d568283170454bab0c11f8257 Mon Sep 17 00:00:00 2001
From: Victor Stinner <victor.stinner@gmail.com>
Date: Mon, 2 Feb 2015 18:36:31 +0100
Subject: Issue #23353, asyncio: Workaround CPython bug #23353

Don't use yield/yield-from in an except block of a generator. Store the
exception and handle it outside the except block.
---
 Lib/asyncio/test_utils.py | 4 ++++
 1 file changed, 4 insertions(+)

(limited to 'Lib/asyncio/test_utils.py')

diff --git a/Lib/asyncio/test_utils.py b/Lib/asyncio/test_utils.py
index 6eedc583db..8cee95b84f 100644
--- a/Lib/asyncio/test_utils.py
+++ b/Lib/asyncio/test_utils.py
@@ -416,6 +416,10 @@ class TestCase(unittest.TestCase):
     def tearDown(self):
         events.set_event_loop(None)
 
+        # Detect CPython bug #23353: ensure that yield/yield-from is not used
+        # in an except block of a generator
+        self.assertEqual(sys.exc_info(), (None, None, None))
+
 
 @contextlib.contextmanager
 def disable_logger():
-- 
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