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Bug 1958897

Summary: python-zarr fails to build with Python 3.10: Many TypeErrors from lmdb.cffi
Product: [Fedora] Fedora Reporter: Miro Hrončok <mhroncok>
Component: python-zarrAssignee: Elliott Sales de Andrade <quantum.analyst>
Status: CLOSED DUPLICATE QA Contact: Fedora Extras Quality Assurance <extras-qa>
Severity: unspecified Docs Contact:
Priority: unspecified    
Version: rawhideCC: mhroncok, python-sig, quantum.analyst, thrnciar
Target Milestone: ---   
Target Release: ---   
Hardware: Unspecified   
OS: Unspecified   
Fixed In Version: Doc Type: If docs needed, set a value
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Clone Of: Environment:
Last Closed: 2021-05-12 15:12:36 UTC Type: Bug
Regression: --- Mount Type: ---
Documentation: --- CRM:
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Bug Depends On: 1904386    
Bug Blocks: 1890881    

Description Miro Hrončok 2021-05-10 11:53:53 UTC
python-zarr fails to build with Python 3.10.0b1:

E       TypeError: initializer for ctype 'char *' must be a cdata pointer, not numpy.ndarray
/usr/lib64/python3.10/site-packages/lmdb/ TypeError
E       TypeError: len() of unsized object
/usr/lib64/python3.10/site-packages/lmdb/ TypeError
FAILED zarr/tests/ - TypeE...
FAILED zarr/tests/ - Ty...
FAILED zarr/tests/
FAILED zarr/tests/
FAILED zarr/tests/
FAILED zarr/tests/
FAILED zarr/tests/
FAILED zarr/tests/
FAILED zarr/tests/
FAILED zarr/tests/
FAILED zarr/tests/
FAILED zarr/tests/ - Type...
FAILED zarr/tests/ - T...
FAILED zarr/tests/ - Typ...
==== 14 failed, 1924 passed, 367 skipped, 2 xfailed, 11 warnings in 54.41s =====

For the build logs, see:

For all our attempts to build python-zarr with Python 3.10, see:

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 3.10:

Let us know here if you have any questions.

Python 3.10 will be included in Fedora 35. To make that update smoother, we're building Fedora packages with early pre-releases of Python 3.10.
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.

Comment 1 Elliott Sales de Andrade 2021-05-12 02:46:48 UTC
LMDB is still extremely outdated, so I'm not going to expend any time investigating this, even if the COPR is building latest, because it won't have an effect on Rawhide. And I suspect the problem is in LMDB anyway.

Comment 2 Miro Hrončok 2021-05-12 15:12:36 UTC

*** This bug has been marked as a duplicate of bug 1949437 ***