As result the test is failed in leaks searching mode.

$ ./python -m test.regrtest -uall -R 3:3 test_property
[1/1] test_property
beginning 6 repetitions
123456
test test_property failed -- Traceback (most recent call last):
  File "/home/serhiy/py/cpython-debug/Lib/test/test_property.py", line 172, in test_property_decorator_doc_writable
    self.assertEqual(sub.__class__.spam.__doc__, 'Eggs')
AssertionError: 'Spam' != 'Eggs'
- Spam
+ Eggs


1 test failed:
    test_property