python-dns fails to build with Python 3.10.0a5.

======================= 11 passed, 2 deselected in 1.50s =======================
Error in sys.excepthook:
Traceback (most recent call last):
  File "/usr/lib/python3.10/site-packages/trio/_core/_multierror.py", line 434, in trio_excepthook
    for chunk in traceback.format_exception(etype, value, tb):
  File "/usr/lib64/python3.10/traceback.py", line 129, in format_exception
    te = TracebackException(type(value), value, tb, limit=limit, compact=True)
TypeError: traceback_exception_init() got an unexpected keyword argument 'compact'

Original exception was:
Traceback (most recent call last):
  File "/usr/lib/python3.10/site-packages/_pytest/main.py", line 269, in wrap_session
    session.exitstatus = doit(config, session) or 0
  File "/usr/lib/python3.10/site-packages/_pytest/main.py", line 323, in _main
    config.hook.pytest_runtestloop(session=session)
  File "/usr/lib/python3.10/site-packages/pluggy/hooks.py", line 286, in __call__
    return self._hookexec(self, self.get_hookimpls(), kwargs)
  File "/usr/lib/python3.10/site-packages/pluggy/manager.py", line 93, in _hookexec
    return self._inner_hookexec(hook, methods, kwargs)
  File "/usr/lib/python3.10/site-packages/pluggy/manager.py", line 84, in <lambda>
    self._inner_hookexec = lambda hook, methods, kwargs: hook.multicall(
  File "/usr/lib/python3.10/site-packages/pluggy/callers.py", line 208, in _multicall
    return outcome.get_result()
  File "/usr/lib/python3.10/site-packages/pluggy/callers.py", line 80, in get_result
    raise ex[1].with_traceback(ex[2])
  File "/usr/lib/python3.10/site-packages/pluggy/callers.py", line 187, in _multicall
    res = hook_impl.function(*args)
  File "/usr/lib/python3.10/site-packages/_pytest/main.py", line 348, in pytest_runtestloop
    item.config.hook.pytest_runtest_protocol(item=item, nextitem=nextitem)
  File "/usr/lib/python3.10/site-packages/pluggy/hooks.py", line 286, in __call__
    return self._hookexec(self, self.get_hookimpls(), kwargs)
  File "/usr/lib/python3.10/site-packages/pluggy/manager.py", line 93, in _hookexec
    return self._inner_hookexec(hook, methods, kwargs)
  File "/usr/lib/python3.10/site-packages/pluggy/manager.py", line 84, in <lambda>
    self._inner_hookexec = lambda hook, methods, kwargs: hook.multicall(
  File "/usr/lib/python3.10/site-packages/pluggy/callers.py", line 208, in _multicall
    return outcome.get_result()
  File "/usr/lib/python3.10/site-packages/pluggy/callers.py", line 80, in get_result
    raise ex[1].with_traceback(ex[2])
  File "/usr/lib/python3.10/site-packages/pluggy/callers.py", line 187, in _multicall
    res = hook_impl.function(*args)
  File "/usr/lib/python3.10/site-packages/_pytest/runner.py", line 109, in pytest_runtest_protocol
    runtestprotocol(item, nextitem=nextitem)
  File "/usr/lib/python3.10/site-packages/_pytest/runner.py", line 126, in runtestprotocol
    reports.append(call_and_report(item, "call", log))
  File "/usr/lib/python3.10/site-packages/_pytest/runner.py", line 217, in call_and_report
    report: TestReport = hook.pytest_runtest_makereport(item=item, call=call)
  File "/usr/lib/python3.10/site-packages/pluggy/hooks.py", line 286, in __call__
    return self._hookexec(self, self.get_hookimpls(), kwargs)
  File "/usr/lib/python3.10/site-packages/pluggy/manager.py", line 93, in _hookexec
    return self._inner_hookexec(hook, methods, kwargs)
  File "/usr/lib/python3.10/site-packages/pluggy/manager.py", line 84, in <lambda>
    self._inner_hookexec = lambda hook, methods, kwargs: hook.multicall(
  File "/usr/lib/python3.10/site-packages/pluggy/callers.py", line 203, in _multicall
    gen.send(outcome)
  File "/usr/lib/python3.10/site-packages/_pytest/skipping.py", line 272, in pytest_runtest_makereport
    rep = outcome.get_result()
  File "/usr/lib/python3.10/site-packages/pluggy/callers.py", line 80, in get_result
    raise ex[1].with_traceback(ex[2])
  File "/usr/lib/python3.10/site-packages/pluggy/callers.py", line 187, in _multicall
    res = hook_impl.function(*args)
  File "/usr/lib/python3.10/site-packages/_pytest/runner.py", line 337, in pytest_runtest_makereport
    return TestReport.from_item_and_call(item, call)
  File "/usr/lib/python3.10/site-packages/_pytest/reports.py", line 317, in from_item_and_call
    r = excinfo._getreprcrash()
  File "/usr/lib/python3.10/site-packages/_pytest/_code/code.py", line 585, in _getreprcrash
    exconly = self.exconly(tryshort=True)
  File "/usr/lib/python3.10/site-packages/_pytest/_code/code.py", line 567, in exconly
    lines = format_exception_only(self.type, self.value)
  File "/usr/lib64/python3.10/traceback.py", line 149, in format_exception_only
    te = TracebackException(type(value), value, None, compact=True)
TypeError: traceback_exception_init() got an unexpected keyword argument 'compact'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/usr/bin/pytest", line 33, in <module>
    sys.exit(load_entry_point('pytest==6.2.2', 'console_scripts', 'pytest')())
  File "/usr/lib/python3.10/site-packages/_pytest/config/__init__.py", line 185, in console_main
    code = main()
  File "/usr/lib/python3.10/site-packages/_pytest/config/__init__.py", line 162, in main
    ret: Union[ExitCode, int] = config.hook.pytest_cmdline_main(
  File "/usr/lib/python3.10/site-packages/pluggy/hooks.py", line 286, in __call__
    return self._hookexec(self, self.get_hookimpls(), kwargs)
  File "/usr/lib/python3.10/site-packages/pluggy/manager.py", line 93, in _hookexec
    return self._inner_hookexec(hook, methods, kwargs)
  File "/usr/lib/python3.10/site-packages/pluggy/manager.py", line 84, in <lambda>
    self._inner_hookexec = lambda hook, methods, kwargs: hook.multicall(
  File "/usr/lib/python3.10/site-packages/pluggy/callers.py", line 208, in _multicall
    return outcome.get_result()
  File "/usr/lib/python3.10/site-packages/pluggy/callers.py", line 80, in get_result
    raise ex[1].with_traceback(ex[2])
  File "/usr/lib/python3.10/site-packages/pluggy/callers.py", line 187, in _multicall
    res = hook_impl.function(*args)
  File "/usr/lib/python3.10/site-packages/_pytest/main.py", line 316, in pytest_cmdline_main
    return wrap_session(config, _main)
  File "/usr/lib/python3.10/site-packages/_pytest/main.py", line 289, in wrap_session
    config.notify_exception(excinfo, config.option)
  File "/usr/lib/python3.10/site-packages/_pytest/config/__init__.py", line 1034, in notify_exception
    excrepr = excinfo.getrepr(
  File "/usr/lib/python3.10/site-packages/_pytest/_code/code.py", line 632, in getrepr
    traceback.format_exception(
  File "/usr/lib64/python3.10/traceback.py", line 129, in format_exception
    te = TracebackException(type(value), value, tb, limit=limit, compact=True)
TypeError: traceback_exception_init() got an unexpected keyword argument 'compact'
error: Bad exit status from /var/tmp/rpm-tmp.BeAbf8 (%check)
    Bad exit status from /var/tmp/rpm-tmp.BeAbf8 (%check)

For the build logs, see:
https://copr-be.cloud.fedoraproject.org/results/@python/python3.10/fedora-rawhide-x86_64/01957508-python-dns/

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

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.