visidata fails to build with Python 3.10.0a5.

==================================== ERRORS ====================================
________________________ ERROR collecting test session _________________________
/usr/lib64/python3.10/importlib/__init__.py:126: in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
<frozen importlib._bootstrap>:1049: in _gcd_import
    ???
<frozen importlib._bootstrap>:1026: in _find_and_load
    ???
<frozen importlib._bootstrap>:991: in _find_and_load_unlocked
    ???
<frozen importlib._bootstrap>:241: in _call_with_frames_removed
    ???
<frozen importlib._bootstrap>:1049: in _gcd_import
    ???
<frozen importlib._bootstrap>:1026: in _find_and_load
    ???
<frozen importlib._bootstrap>:991: in _find_and_load_unlocked
    ???
<frozen importlib._bootstrap>:241: in _call_with_frames_removed
    ???
<frozen importlib._bootstrap>:1049: in _gcd_import
    ???
<frozen importlib._bootstrap>:1026: in _find_and_load
    ???
<frozen importlib._bootstrap>:1005: in _find_and_load_unlocked
    ???
<frozen importlib._bootstrap>:698: in _load_unlocked
    ???
<frozen importlib._bootstrap_external>:833: in exec_module
    ???
<frozen importlib._bootstrap>:241: in _call_with_frames_removed
    ???
visidata/__init__.py:48: in <module>
    from .column import *
visidata/column.py:19: in <module>
    INPROGRESS = TypedExceptionWrapper(None, exception=InProgress())  # sentinel
visidata/wrappers.py:63: in __init__
    self.stacktrace = stacktrace()
visidata/errors.py:14: in stacktrace
    return traceback.format_exc().strip().splitlines()
/usr/lib64/python3.10/traceback.py:177: in format_exc
    return "".join(format_exception(*sys.exc_info(), limit=limit, chain=chain))
/usr/lib64/python3.10/traceback.py:129: in format_exception
    te = TracebackException(type(value), value, tb, limit=limit, compact=True)
/usr/lib64/python3.10/traceback.py:531: in __init__
    need_context = cause is None and not e.__suppress_context__
E   AttributeError: 'NoneType' object has no attribute '__suppress_context__'
=========================== short test summary info ============================
ERROR  - AttributeError: 'NoneType' object has no attribute '__suppress_conte...
!!!!!!!!!!!!!!!!!!!! Interrupted: 1 error during collection !!!!!!!!!!!!!!!!!!!!
=============================== 1 error in 0.17s ===============================

For the build logs, see:
https://copr-be.cloud.fedoraproject.org/results/@python/python3.10/fedora-rawhide-x86_64/01959419-visidata/

For all our attempts to build visidata with Python 3.10, see:
https://copr.fedorainfracloud.org/coprs/g/python/python3.10/package/visidata/

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:
https://copr.fedorainfracloud.org/coprs/g/python/python3.10/

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.