From: Victor Stinner <victor.stinner@gmail.com>
Date: Fri, 18 Aug 2017 23:54:42 +0000 (+0200)
Subject: bpo-31234: test_threading: fix ref cycle (#3150)
X-Git-Tag: v3.7.0a1~247
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=3d284c081fc3042036adfe1bf2ce92c34d743b0b;p=python

bpo-31234: test_threading: fix ref cycle (#3150)

test_bare_raise_in_brand_new_thread() now explicitly breaks a
reference cycle to not leak a dangling thread.
---

diff --git a/Lib/test/test_threading.py b/Lib/test/test_threading.py
index 0f3ac555c2..800d26f71b 100644
--- a/Lib/test/test_threading.py
+++ b/Lib/test/test_threading.py
@@ -1069,6 +1069,8 @@ class ThreadingExceptionTests(BaseTestCase):
         thread.join()
         self.assertIsNotNone(thread.exc)
         self.assertIsInstance(thread.exc, RuntimeError)
+        # explicitly break the reference cycle to not leak a dangling thread
+        thread.exc = None
 
 class TimerTests(BaseTestCase):