From cdce0574d03005e27b843fc110c54c99c7a76412 Mon Sep 17 00:00:00 2001
From: Victor Stinner <vstinner@redhat.com>
Date: Sun, 2 Jun 2019 23:08:41 +0200
Subject: bpo-36829: test_threading: Fix a ref cycle (GH-13752)

---
 Lib/test/test_threading.py | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

(limited to 'Lib/test/test_threading.py')

diff --git a/Lib/test/test_threading.py b/Lib/test/test_threading.py
index 8c8cc128b05..6ac4ea9623d 100644
--- a/Lib/test/test_threading.py
+++ b/Lib/test/test_threading.py
@@ -1140,7 +1140,11 @@ class ExceptHookTests(BaseTestCase):
                 raise ValueError("bug")
             except Exception as exc:
                 args = threading.ExceptHookArgs([*sys.exc_info(), None])
-                threading.excepthook(args)
+                try:
+                    threading.excepthook(args)
+                finally:
+                    # Explicitly break a reference cycle
+                    args = None
 
         stderr = stderr.getvalue().strip()
         self.assertIn(f'Exception in thread {threading.get_ident()}:\n', stderr)
-- 
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