From abefbcba8a0ced0f729c08031672d6f188059181 Mon Sep 17 00:00:00 2001
From: "Miss Islington (bot)"
 <31488909+miss-islington@users.noreply.github.com>
Date: Thu, 4 Jul 2024 20:07:07 +0200
Subject: [PATCH] [3.13] gh-121084: Fix test_typing random leaks (GH-121360)
 (#121373)

gh-121084: Fix test_typing random leaks (GH-121360)

Clear typing ABC caches when running tests for refleaks (-R option):
call _abc_caches_clear() on typing abstract classes and their
subclasses.
(cherry picked from commit 5f660e8e2ca3acfb89ccbdd990f072149b6baa6a)

Co-authored-by: Victor Stinner <vstinner@python.org>
---
 Lib/test/libregrtest/utils.py                               | 6 ++++++
 .../Tests/2024-07-04-15-10-29.gh-issue-121084.qxcd5d.rst    | 3 +++
 2 files changed, 9 insertions(+)
 create mode 100644 Misc/NEWS.d/next/Tests/2024-07-04-15-10-29.gh-issue-121084.qxcd5d.rst

diff --git a/Lib/test/libregrtest/utils.py b/Lib/test/libregrtest/utils.py
index 0167742d388..f4d3b005af8 100644
--- a/Lib/test/libregrtest/utils.py
+++ b/Lib/test/libregrtest/utils.py
@@ -264,6 +264,12 @@ def clear_caches():
         for f in typing._cleanups:
             f()
 
+        import inspect
+        abs_classes = filter(inspect.isabstract, typing.__dict__.values())
+        for abc in abs_classes:
+            for obj in abc.__subclasses__() + [abc]:
+                obj._abc_caches_clear()
+
     try:
         fractions = sys.modules['fractions']
     except KeyError:
diff --git a/Misc/NEWS.d/next/Tests/2024-07-04-15-10-29.gh-issue-121084.qxcd5d.rst b/Misc/NEWS.d/next/Tests/2024-07-04-15-10-29.gh-issue-121084.qxcd5d.rst
new file mode 100644
index 00000000000..b91ea8acfad
--- /dev/null
+++ b/Misc/NEWS.d/next/Tests/2024-07-04-15-10-29.gh-issue-121084.qxcd5d.rst
@@ -0,0 +1,3 @@
+Fix test_typing random leaks. Clear typing ABC caches when running tests for
+refleaks (``-R`` option): call ``_abc_caches_clear()`` on typing abstract
+classes and their subclasses. Patch by Victor Stinner.