Bug 2440566

python-websockets fails to build with Python 3.15.0a6.

___________ ApplyMaskTests.test_apply_mask_non_contiguous_memoryview ___________

self = <tests.test_utils.ApplyMaskTests testMethod=test_apply_mask_non_contiguous_memoryview>

    def test_apply_mask_non_contiguous_memoryview(self):
        for mask_type in [bytes, bytearray]:
            for data_in, mask, data_out in self.apply_mask_test_values:
                data_in, mask = memoryview(data_in)[::-1], mask_type(mask)[::-1]
                data_out = data_out[::-1]
    
                with self.subTest(data_in=data_in, mask=mask):
>                   result = self.apply_mask(data_in, mask)
                             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

tests/test_utils.py:62: 
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 
tests/test_utils.py:26: in apply_mask
    return py_apply_mask(*args, **kwargs)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 

data = <memory at 0x7f2610c81fc0>, mask = b'4321'

    def apply_mask(data: bytes, mask: bytes) -> bytes:
        """
        Apply masking to the data of a WebSocket message.
    
        Args:
            data: Data to mask.
            mask: 4-bytes mask.
    
        """
        if len(mask) != 4:
            raise ValueError("mask must contain 4 bytes")
    
>       data_int = int.from_bytes(data, sys.byteorder)
                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
E       BufferError: memoryview: underlying buffer is not C-contiguous


https://docs.python.org/3.15/whatsnew/3.15.html

For the build logs, see:
https://copr-be.cloud.fedoraproject.org/results/@python/python3.15/fedora-rawhide-x86_64/10144895-python-websockets/

For all our attempts to build python-websockets with Python 3.15, see:
https://copr.fedorainfracloud.org/coprs/g/python/python3.15/package/python-websockets/

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 3.15:
https://copr.fedorainfracloud.org/coprs/g/python/python3.15/

Let us know here if you have any questions.

Python 3.15 is planned to be included in Fedora 45.
To make that update smoother, we're building Fedora packages with all pre-releases of Python 3.15.
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.