Bug 2367992

Summary: python-anyio fails to build with Python 3.14: test_copy and test_copy_into fail with pathlib's AttributeError: 'Path' object has no attribute '_copy_from'
Product: [Fedora] Fedora Reporter: Karolina Surma <ksurma>
Component: python-anyioAssignee: Miro Hrončok <mhroncok>
Status: CLOSED RAWHIDE QA Contact: Fedora Extras Quality Assurance <extras-qa>
Severity: unspecified Docs Contact:
Priority: unspecified    
Version: rawhideCC: carl, ksurma, mail, mhroncok, python-packagers-sig
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Last Closed: 2025-06-11 10:47:31 UTC Type: Bug
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Bug Blocks: 2322407    

Description Karolina Surma 2025-05-22 14:09:11 UTC
python-anyio fails to build with Python 3.14.0b1.

_________________________ TestPath.test_copy[asyncio] __________________________
tests/test_fileio.py:339: in test_copy
    result = await source_path.copy(destination_path)  # type: ignore[attr-defined]
../BUILDROOT/usr/lib/python3.14/site-packages/anyio/_core/_fileio.py:428: in copy
    return Path(await to_thread.run_sync(func, target))
../BUILDROOT/usr/lib/python3.14/site-packages/anyio/to_thread.py:56: in run_sync
    return await get_async_backend().run_sync_in_worker_thread(
../BUILDROOT/usr/lib/python3.14/site-packages/anyio/_backends/_asyncio.py:2461: in run_sync_in_worker_thread
    return await future
../BUILDROOT/usr/lib/python3.14/site-packages/anyio/_backends/_asyncio.py:962: in run
    result = context.run(func, *args)
/usr/lib64/python3.14/pathlib/__init__.py:1108: in copy
    target._copy_from(self, **kwargs)
E   AttributeError: 'Path' object has no attribute '_copy_from'
______________________ TestPath.test_copy[asyncio+eager] _______________________
tests/test_fileio.py:339: in test_copy
    result = await source_path.copy(destination_path)  # type: ignore[attr-defined]
../BUILDROOT/usr/lib/python3.14/site-packages/anyio/_core/_fileio.py:428: in copy
    return Path(await to_thread.run_sync(func, target))
../BUILDROOT/usr/lib/python3.14/site-packages/anyio/to_thread.py:56: in run_sync
    return await get_async_backend().run_sync_in_worker_thread(
../BUILDROOT/usr/lib/python3.14/site-packages/anyio/_backends/_asyncio.py:2461: in run_sync_in_worker_thread
    return await future
../BUILDROOT/usr/lib/python3.14/site-packages/anyio/_backends/_asyncio.py:962: in run
    result = context.run(func, *args)
/usr/lib64/python3.14/pathlib/__init__.py:1108: in copy
    target._copy_from(self, **kwargs)
E   AttributeError: 'Path' object has no attribute '_copy_from'
___________________________ TestPath.test_copy[trio] ___________________________
tests/test_fileio.py:339: in test_copy
    result = await source_path.copy(destination_path)  # type: ignore[attr-defined]
../BUILDROOT/usr/lib/python3.14/site-packages/anyio/_core/_fileio.py:428: in copy
    return Path(await to_thread.run_sync(func, target))
../BUILDROOT/usr/lib/python3.14/site-packages/anyio/to_thread.py:56: in run_sync
    return await get_async_backend().run_sync_in_worker_thread(
../BUILDROOT/usr/lib/python3.14/site-packages/anyio/_backends/_trio.py:1079: in run_sync_in_worker_thread
    return await run_sync(
/usr/lib/python3.14/site-packages/trio/_threads.py:447: in to_thread_run_sync
    return msg_from_thread.unwrap()
/usr/lib/python3.14/site-packages/outcome/_impl.py:213: in unwrap
    raise captured_error
/usr/lib/python3.14/site-packages/trio/_threads.py:373: in do_release_then_return_result
    return result.unwrap()
/usr/lib/python3.14/site-packages/outcome/_impl.py:213: in unwrap
    raise captured_error
/usr/lib/python3.14/site-packages/trio/_threads.py:392: in worker_fn
    ret = context.run(sync_fn, *args)
../BUILDROOT/usr/lib/python3.14/site-packages/anyio/_backends/_trio.py:1076: in wrapper
    return func(*args)
/usr/lib64/python3.14/pathlib/__init__.py:1108: in copy
    target._copy_from(self, **kwargs)
E   AttributeError: 'Path' object has no attribute '_copy_from'
_______________________ TestPath.test_copy_into[asyncio] _______________________
tests/test_fileio.py:351: in test_copy_into
    result = await source_path.copy_into(destination_path)  # type: ignore[attr-defined]
../BUILDROOT/usr/lib/python3.14/site-packages/anyio/_core/_fileio.py:442: in copy_into
    return Path(await to_thread.run_sync(func, target_dir))
../BUILDROOT/usr/lib/python3.14/site-packages/anyio/to_thread.py:56: in run_sync
    return await get_async_backend().run_sync_in_worker_thread(
../BUILDROOT/usr/lib/python3.14/site-packages/anyio/_backends/_asyncio.py:2461: in run_sync_in_worker_thread
    return await future
../BUILDROOT/usr/lib/python3.14/site-packages/anyio/_backends/_asyncio.py:962: in run
    result = context.run(func, *args)
/usr/lib64/python3.14/pathlib/__init__.py:1122: in copy_into
    return self.copy(target, **kwargs)
/usr/lib64/python3.14/pathlib/__init__.py:1108: in copy
    target._copy_from(self, **kwargs)
E   AttributeError: 'Path' object has no attribute '_copy_from'
____________________ TestPath.test_copy_into[asyncio+eager] ____________________
tests/test_fileio.py:351: in test_copy_into
    result = await source_path.copy_into(destination_path)  # type: ignore[attr-defined]
../BUILDROOT/usr/lib/python3.14/site-packages/anyio/_core/_fileio.py:442: in copy_into
    return Path(await to_thread.run_sync(func, target_dir))
../BUILDROOT/usr/lib/python3.14/site-packages/anyio/to_thread.py:56: in run_sync
    return await get_async_backend().run_sync_in_worker_thread(
../BUILDROOT/usr/lib/python3.14/site-packages/anyio/_backends/_asyncio.py:2461: in run_sync_in_worker_thread
    return await future
../BUILDROOT/usr/lib/python3.14/site-packages/anyio/_backends/_asyncio.py:962: in run
    result = context.run(func, *args)
/usr/lib64/python3.14/pathlib/__init__.py:1122: in copy_into
    return self.copy(target, **kwargs)
/usr/lib64/python3.14/pathlib/__init__.py:1108: in copy
    target._copy_from(self, **kwargs)
E   AttributeError: 'Path' object has no attribute '_copy_from'
________________________ TestPath.test_copy_into[trio] _________________________
tests/test_fileio.py:351: in test_copy_into
    result = await source_path.copy_into(destination_path)  # type: ignore[attr-defined]
../BUILDROOT/usr/lib/python3.14/site-packages/anyio/_core/_fileio.py:442: in copy_into
    return Path(await to_thread.run_sync(func, target_dir))
../BUILDROOT/usr/lib/python3.14/site-packages/anyio/to_thread.py:56: in run_sync
    return await get_async_backend().run_sync_in_worker_thread(
../BUILDROOT/usr/lib/python3.14/site-packages/anyio/_backends/_trio.py:1079: in run_sync_in_worker_thread
    return await run_sync(
/usr/lib/python3.14/site-packages/trio/_threads.py:447: in to_thread_run_sync
    return msg_from_thread.unwrap()
/usr/lib/python3.14/site-packages/outcome/_impl.py:213: in unwrap
    raise captured_error
/usr/lib/python3.14/site-packages/trio/_threads.py:373: in do_release_then_return_result
    return result.unwrap()
/usr/lib/python3.14/site-packages/outcome/_impl.py:213: in unwrap
    raise captured_error
/usr/lib/python3.14/site-packages/trio/_threads.py:392: in worker_fn
    ret = context.run(sync_fn, *args)
../BUILDROOT/usr/lib/python3.14/site-packages/anyio/_backends/_trio.py:1076: in wrapper
    return func(*args)
/usr/lib64/python3.14/pathlib/__init__.py:1122: in copy_into
    return self.copy(target, **kwargs)
/usr/lib64/python3.14/pathlib/__init__.py:1108: in copy
    target._copy_from(self, **kwargs)
E   AttributeError: 'Path' object has no attribute '_copy_from'

https://docs.python.org/3.14/whatsnew/3.14.html

For the build logs, see:
https://copr-be.cloud.fedoraproject.org/results/@python/python3.14-b1/fedora-rawhide-x86_64/09072947-python-anyio/

For all our attempts to build python-anyio with Python 3.14, see:
https://copr.fedorainfracloud.org/coprs/g/python/python3.14-b1/package/python-anyio/

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 3.14:
https://copr.fedorainfracloud.org/coprs/g/python/python3.14-b1/

Let us know here if you have any questions.

Python 3.14 is planned to be included in Fedora 43.
To make that update smoother, we're building Fedora packages with all pre-releases of Python 3.14.
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.