commit 1c873bf77d855e821d7c1b4d9a2489b2a1b85f5f
author Benjamin Peterson <benjamin@python.org> Mon Sep 29 22:46:57 2014 -0400
committer Benjamin Peterson <benjamin@python.org> Mon Sep 29 22:46:57 2014 -0400
tree 9b334f8dbb6480d9d2149d7fe1d6dddf2a045a69
parent f8c4b3a730461c10766f66784c268ce0d923ad39

clear BufferedRWPair weakrefs on deallocation (closes #22517)

Lib/test/test_io.py

diff --git a/Lib/test/test_io.py b/Lib/test/test_io.py
index af3b90a..2a3b4a3 100644
--- a/Lib/test/test_io.py
+++ b/Lib/test/test_io.py
@@ -1474,6 +1474,12 @@
         pair = self.tp(SelectableIsAtty(True), SelectableIsAtty(True))
         self.assertTrue(pair.isatty())
 
+    def test_weakref_clearing(self):
+        brw = self.tp(self.MockRawIO(), self.MockRawIO())
+        ref = weakref.ref(brw)
+        brw = None
+        ref = None # Shouldn't segfault.
+
 class CBufferedRWPairTest(BufferedRWPairTest):
     tp = io.BufferedRWPair