From 913fa1c8245d1cde6edb4254f4fb965cc91786ef Mon Sep 17 00:00:00 2001
From: Victor Stinner <vstinner@redhat.com>
Date: Wed, 12 Jun 2019 23:57:11 +0200
Subject: [PATCH] bpo-37223, test_io: silence last 'Exception ignored in:'
 (GH-14029)

Use catch_unraisable_exception() to ignore 'Exception ignored in:'
error when the internal BufferedWriter of the BufferedRWPair is
destroyed. The C implementation doesn't give access to the
internal BufferedWriter, so just ignore the warning instead.
---
 Lib/test/test_io.py | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/Lib/test/test_io.py b/Lib/test/test_io.py
index 102679b1d34..55686d74398 100644
--- a/Lib/test/test_io.py
+++ b/Lib/test/test_io.py
@@ -2070,6 +2070,11 @@ class BufferedRWPairTest(unittest.TestCase):
 
         # Silence destructor error
         writer.close = lambda: None
+        writer = None
+
+        with support.catch_unraisable_exception():
+            pair = None
+            support.gc_collect()
 
     def test_reader_writer_close_error_on_close(self):
         def reader_close():