pythongh-121084: Fix test_typing random leaks (python#121360)

vstinner · estyxx · commit 289b85b99bc0 · 2024-07-17T09:51:45.000+01:00
Clear typing ABC caches when running tests for refleaks (-R option):
call _abc_caches_clear() on typing abstract classes and their
subclasses.
diff --git 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
@@ -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.

Original file line number	Diff line number	Diff line change
`@@ -0,0 +1,3 @@`
	`1`	`+Fix test_typing random leaks. Clear typing ABC caches when running tests for`
	`2`	+refleaks (``-R`` option): call ``_abc_caches_clear()`` on typing abstract
	`3`	`+classes and their subclasses. Patch by Victor Stinner.`