From: Sam Gross <colesbury@gmail.com>
Date: Mon, 24 Mar 2025 20:41:50 +0000 (-0400)
Subject: gh-131677: Fix flaky test_lru_cache_threaded3 (gh-131679)
X-Git-Tag: v3.14.0a7~203
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=a1232459860235f4fb7896cc95966d87a51cbe32;p=thirdparty%2FPython%2Fcpython.git

gh-131677: Fix flaky test_lru_cache_threaded3 (gh-131679)

The call to `with self.subTest(...)` was not thread-safe.
---

diff --git a/Lib/test/test_functools.py b/Lib/test/test_functools.py
index 0bbfcfd0369c..2b49615178f1 100644
--- a/Lib/test/test_functools.py
+++ b/Lib/test/test_functools.py
@@ -1934,8 +1934,7 @@ class TestLRU:
             time.sleep(.01)
             return 3 * x
         def test(i, x):
-            with self.subTest(thread=i):
-                self.assertEqual(f(x), 3 * x, i)
+            self.assertEqual(f(x), 3 * x, i)
         threads = [threading.Thread(target=test, args=(i, v))
                    for i, v in enumerate([1, 2, 2, 3, 2])]
         with threading_helper.start_threads(threads):