Aug 8, 2025 · Jun 22, 2025 · Jun 22, 2025 · Jun 24, 2025 · Jul 4, 2025 · Jul 4, 2025
diff --git a/Lib/test/test_weakref.py b/Lib/test/test_weakref.py
        self.assertNotRegex(stderr, "_Py_Dealloc: Deallocator of type 'TestObj'")

    def test_clearing_weakrefs_in_gc(self):
        # This test checks that:
        # 1. weakrefs for types with callbacks are cleared before the
        # finalizer is called
        # 2. weakrefs for types without callbacks are cleared after the
        # finalizer is called
        # 3. other weakrefs cleared before the finalizer is called
        # This test checks that when finalizers are called:
        # 1. weakrefs with callbacks have been cleared
        # 2. weakrefs without callbacks have not been cleared
        errors = []
        def test():
            class Class:
                def __init__(self):
                    self._self = self
                    self.wr1 = weakref.ref(Class, lambda x: None)
                    self.wr2 = weakref.ref(Class)
                    self.wr3 = weakref.ref(self)

                def __del__(self):
                    # we can't use assert* here, because gc will swallow
                    # exceptions
                    if self.wr1() is not None:
                        errors.append("Typeweakref with callbackis not None")
                        errors.append("weakref with callbackas cleared")
                    if self.wr2() is not Class:
                        errors.append("Type weakref is not Class")
                    if self.wr3() is not None:
                        errors.append("Instance weakref is not None")
                        errors.append("weakref without callback was cleared")

            Class()
Original file line number	Diff line number	Diff line change
Expand Up		@@ -1045,30 +1045,24 @@ def callback(obj):
		self.assertNotRegex(stderr, "_Py_Dealloc: Deallocator of type 'TestObj'")

		def test_clearing_weakrefs_in_gc(self):
		# This test checks that:
		# 1. weakrefs for types with callbacks are cleared before the
		# finalizer is called
		# 2. weakrefs for types without callbacks are cleared after the
		# finalizer is called
		# 3. other weakrefs cleared before the finalizer is called
		# This test checks that when finalizers are called:
		# 1. weakrefs with callbacks have been cleared
		# 2. weakrefs without callbacks have not been cleared
		errors = []
		def test():
		class Class:
		def __init__(self):
		self._self = self
		self.wr1 = weakref.ref(Class, lambda x: None)
		self.wr2 = weakref.ref(Class)
		self.wr3 = weakref.ref(self)

		def __del__(self):
		# we can't use assert* here, because gc will swallow
		# exceptions
		if self.wr1() is not None:
		errors.append("Typeweakref with callbackis not None")
		errors.append("weakref with callbackas cleared")
		if self.wr2() is not Class:
		errors.append("Type weakref is not Class")
		if self.wr3() is not None:
		errors.append("Instance weakref is not None")
		errors.append("weakref without callback was cleared")

		Class()

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