linkchecker fails to build with Python 3.13.0a1.

______________ ERROR collecting tests/checker/test_whitespace.py _______________
ImportError while importing test module '/builddir/build/BUILD/linkchecker-10.2.1/tests/checker/test_whitespace.py'.
Hint: make sure your test modules/packages have valid Python names.
Traceback:
/usr/lib64/python3.13/importlib/__init__.py:88: in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
tests/checker/__init__.py:22: in <module>
    import linkcheck.checker
linkcheck/checker/__init__.py:206: in <module>
    from . import (  # noqa: E402
linkcheck/checker/fileurl.py:26: in <module>
    from . import urlbase, get_index_html
linkcheck/checker/urlbase.py:40: in <module>
    from .const import (
linkcheck/checker/const.py:20: in <module>
    import nntplib
E   ModuleNotFoundError: No module named 'nntplib'
=================================== FAILURES ===================================
_______________________ TestLinkchecker.test_linkchecker _______________________
[gw0] linux -- Python 3.13.0 /usr/bin/python3
tests/test_linkchecker.py:40: in test_linkchecker
    run_with_options([option])
tests/test_linkchecker.py:22: in run_with_options
    run_checked([sys.executable, "-m", "linkcheck"] + options)
tests/__init__.py:54: in run_checked
    raise OSError(msg)
E   OSError: Command `['/usr/bin/python3', '-m', 'linkcheck', '-V']' returned non-zero exit status 1
----------------------------- Captured stderr call -----------------------------
Traceback (most recent call last):
  File "<frozen runpy>", line 198, in _run_module_as_main
  File "<frozen runpy>", line 88, in _run_code
  File "/builddir/build/BUILD/linkchecker-10.2.1/linkcheck/__main__.py", line 1, in <module>
    from .command.linkchecker import linkchecker
  File "/builddir/build/BUILD/linkchecker-10.2.1/linkcheck/command/linkchecker.py", line 28, in <module>
    from .arg_parser import ArgParser
  File "/builddir/build/BUILD/linkchecker-10.2.1/linkcheck/command/arg_parser.py", line 22, in <module>
    from .. import checker, logconf, logger, COMMAND_NAME
  File "/builddir/build/BUILD/linkchecker-10.2.1/linkcheck/checker/__init__.py", line 206, in <module>
    from . import (  # noqa: E402
  File "/builddir/build/BUILD/linkchecker-10.2.1/linkcheck/checker/fileurl.py", line 26, in <module>
    from . import urlbase, get_index_html
  File "/builddir/build/BUILD/linkchecker-10.2.1/linkcheck/checker/urlbase.py", line 40, in <module>
    from .const import (
  File "/builddir/build/BUILD/linkchecker-10.2.1/linkcheck/checker/const.py", line 20, in <module>
    import nntplib
ModuleNotFoundError: No module named 'nntplib'

=========================== short test summary info ============================
SKIPPED [1] tests/__init__.py:74: geoip is not available
SKIPPED [2] tests/__init__.py:74: ClamAV is not available
SKIPPED [3] tests/__init__.py:74: network is not available
SKIPPED [1] tests/__init__.py:74: Windows system is not available
ERROR tests/test_cgi.py
ERROR tests/test_console.py
ERROR tests/test_cookies.py
ERROR tests/test_filenames.py
ERROR tests/test_urlbuild.py
ERROR tests/checker/test_all_parts.py
ERROR tests/checker/test_anchor.py
ERROR tests/checker/test_base.py
ERROR tests/checker/test_bookmarks.py
ERROR tests/checker/test_build_url.py
ERROR tests/checker/test_charsets.py
ERROR tests/checker/test_content_allows_robots.py
ERROR tests/checker/test_error.py
ERROR tests/checker/test_file.py
ERROR tests/checker/test_frames.py
ERROR tests/checker/test_ftp.py
ERROR tests/checker/test_guess_url.py
ERROR tests/checker/test_http.py
ERROR tests/checker/test_http_misc.py
ERROR tests/checker/test_http_redirect.py
ERROR tests/checker/test_http_robots.py
ERROR tests/checker/test_httpbin.py
ERROR tests/checker/test_https.py
ERROR tests/checker/test_https_redirect.py
ERROR tests/checker/test_ignoreerrors.py
ERROR tests/checker/test_internpat.py
ERROR tests/checker/test_loginurl.py
ERROR tests/checker/test_mail_bad.py
ERROR tests/checker/test_mail_good.py
ERROR tests/checker/test_misc.py
ERROR tests/checker/test_news.py
ERROR tests/checker/test_unknown.py
ERROR tests/checker/test_urllen.py
ERROR tests/checker/test_viruscheck.py
ERROR tests/checker/test_whitespace.py
FAILED tests/test_linkchecker.py::TestLinkchecker::test_linkchecker - OSError...
======= 1 failed, 192 passed, 7 skipped, 16 warnings, 35 errors in 3.18s =======


PEP 594: The remaining 19 “dead batteries” have been removed from the standard library: aifc, audioop, cgi, cgitb, chunk, crypt, imghdr, mailcap, msilib, nis, nntplib, ossaudiodev, pipes, sndhdr, spwd, sunau, telnetlib, uu and xdrlib.

https://docs.python.org/3.13/whatsnew/3.13.html

For the build logs, see:
https://copr-be.cloud.fedoraproject.org/results/@python/python3.13/fedora-rawhide-x86_64/06583941-linkchecker/

For all our attempts to build linkchecker with Python 3.13, see:
https://copr.fedorainfracloud.org/coprs/g/python/python3.13/package/linkchecker/

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 3.13:
https://copr.fedorainfracloud.org/coprs/g/python/python3.13/

Let us know here if you have any questions.

Python 3.13 is planned to be included in Fedora 41.
To make that update smoother, we're building Fedora packages with all pre-releases of Python 3.13.
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.