python-cloudpickle fails to build with Python 3.11.0b3.


=================================== FAILURES ===================================
______________________ CloudPickleTest.test_extended_arg _______________________

self = <tests.cloudpickle_test.CloudPickleTest testMethod=test_extended_arg>

    @pytest.mark.skipif(
        (3, 11, 0, 'beta') <= sys.version_info < (3, 11, 0, 'beta', 2),
        reason="https://github.com/python/cpython/issues/92932"
    )
    def test_extended_arg(self):
        # Functions with more than 65535 global vars prefix some global
        # variable references with the EXTENDED_ARG opcode.
        nvars = 65537 + 258
        names = ['g%d' % i for i in range(1, nvars)]
        r = random.Random(42)
        d = {name: r.randrange(100) for name in names}
        # def f(x):
        #     x = g1, g2, ...
        #     return zlib.crc32(bytes(bytearray(x)))
        code = """
        import zlib
    
        def f():
            x = {tup}
            return zlib.crc32(bytes(bytearray(x)))
        """.format(tup=', '.join(names))
        exec(textwrap.dedent(code), d, d)
        f = d['f']
        res = f()
        data = cloudpickle.dumps([f, f], protocol=self.protocol)
        d = f = None
        f2, f3 = pickle.loads(data)
        self.assertTrue(f2 is f3)
>       self.assertEqual(f2(), res)

tests/cloudpickle_test.py:1009: 
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 

>   ???
E   NameError: name 'g129' is not defined

<string>:5: NameError
__________________ Protocol2CloudPickleTest.test_extended_arg __________________

self = <tests.cloudpickle_test.Protocol2CloudPickleTest testMethod=test_extended_arg>

    @pytest.mark.skipif(
        (3, 11, 0, 'beta') <= sys.version_info < (3, 11, 0, 'beta', 2),
        reason="https://github.com/python/cpython/issues/92932"
    )
    def test_extended_arg(self):
        # Functions with more than 65535 global vars prefix some global
        # variable references with the EXTENDED_ARG opcode.
        nvars = 65537 + 258
        names = ['g%d' % i for i in range(1, nvars)]
        r = random.Random(42)
        d = {name: r.randrange(100) for name in names}
        # def f(x):
        #     x = g1, g2, ...
        #     return zlib.crc32(bytes(bytearray(x)))
        code = """
        import zlib
    
        def f():
            x = {tup}
            return zlib.crc32(bytes(bytearray(x)))
        """.format(tup=', '.join(names))
        exec(textwrap.dedent(code), d, d)
        f = d['f']
        res = f()
        data = cloudpickle.dumps([f, f], protocol=self.protocol)
        d = f = None
        f2, f3 = pickle.loads(data)
        self.assertTrue(f2 is f3)
>       self.assertEqual(f2(), res)

tests/cloudpickle_test.py:1009: 
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 

>   ???
E   NameError: name 'g129' is not defined

<string>:5: NameError
=============================== warnings summary ===============================
tests/cloudpickle_test.py::CloudPickleTest::test_tornado_coroutine
tests/cloudpickle_test.py::CloudPickleTest::test_tornado_coroutine
tests/cloudpickle_test.py::Protocol2CloudPickleTest::test_tornado_coroutine
  /usr/lib64/python3.11/site-packages/tornado/ioloop.py:263: DeprecationWarning: There is no current event loop
    loop = asyncio.get_event_loop()

tests/cloudpickle_test.py::CloudPickleTest::test_tornado_coroutine
  /usr/lib64/python3.11/site-packages/tornado/platform/asyncio.py:279: DeprecationWarning: There is no current event loop
    super().initialize(asyncio.get_event_loop(), **kwargs)

tests/cloudpickle_test.py::CloudPickleTest::test_tornado_coroutine
tests/cloudpickle_test.py::Protocol2CloudPickleTest::test_tornado_coroutine
  /usr/lib64/python3.11/site-packages/tornado/platform/asyncio.py:193: DeprecationWarning: There is no current event loop
    old_loop = asyncio.get_event_loop()

-- Docs: https://docs.pytest.org/en/stable/how-to/capture-warnings.html
=========================== short test summary info ============================
FAILED tests/cloudpickle_test.py::CloudPickleTest::test_extended_arg - NameEr...
FAILED tests/cloudpickle_test.py::Protocol2CloudPickleTest::test_extended_arg
===== 2 failed, 238 passed, 13 skipped, 3 deselected, 6 warnings in 9.59s ======

https://docs.python.org/3.11/whatsnew/3.11.html

For the build logs, see:
https://copr-be.cloud.fedoraproject.org/results/@python/python3.11/fedora-rawhide-x86_64/04495191-python-cloudpickle/

For all our attempts to build python-cloudpickle with Python 3.11, see:
https://copr.fedorainfracloud.org/coprs/g/python/python3.11/package/python-cloudpickle/

Testing and mass rebuild of packages is happening in copr. You can follow these instructions to test locally in mock if your package builds with Python 3.11:
https://copr.fedorainfracloud.org/coprs/g/python/python3.11/

Let us know here if you have any questions.

Python 3.11 is planned to be included in Fedora 37. To make that update smoother, we're building Fedora packages with all pre-releases of Python 3.11.
A build failure prevents us from testing all dependent packages (transitive [Build]Requires), so if this package is required a lot, it's important for us to get it fixed soon.
We'd appreciate help from the people who know this package best, but if you don't want to work on this now, let us know so we can try to work around it on our side.