======================================================================
FAIL: test_option_encoding (__main__.CommandLineTestCase)
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Traceback (most recent call last):
  File "Lib/test/test_calendar.py", line 831, in test_option_encoding
    stdout = self.run_ok('--encoding', 'utf-16-le', '2004')
  File "Lib/test/test_calendar.py", line 794, in run_ok
    return assert_python_ok('-m', 'calendar', *args)[1]
  File "/home/clemado1/workspace/RustPython/vm/pylib-crate/Lib/test/support/script_helper.py", line 157, in assert_python_ok
    return _assert_python(True, *args, **env_vars)
  File "/home/clemado1/workspace/RustPython/vm/pylib-crate/Lib/test/support/script_helper.py", line 143, in _assert_python
    res.fail(cmd_line)
  File "/home/clemado1/workspace/RustPython/vm/pylib-crate/Lib/test/support/script_helper.py", line 84, in fail
    err))
AssertionError: Process return code is 1
command line: ['/home/clemado1/workspace/RustPython/target/release/rustpython', '-X', 'faulthandler', '-I', '-m', 'calendar', '--encoding', 'utf-16-le', '2004']

stdout:
---

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stderr:
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Traceback (most recent call last):
  File "/home/clemado1/workspace/RustPython/vm/pylib-crate/Lib/runpy.py", line 193, in _run_module_as_main
    "__main__", mod_spec)
  File "/home/clemado1/workspace/RustPython/vm/pylib-crate/Lib/runpy.py", line 85, in _run_code
    exec(code, run_globals)
  File "/home/clemado1/workspace/RustPython/vm/pylib-crate/Lib/calendar.py", line 770, in <module>
    main(sys.argv)
  File "/home/clemado1/workspace/RustPython/vm/pylib-crate/Lib/calendar.py", line 764, in main
    result = result.encode(options.encoding)
  File "/home/clemado1/workspace/RustPython/vm/pylib-crate/Lib/_codecs.py", line 118, in encode
    res = codec[0](v, errors)
  File "/home/clemado1/workspace/RustPython/vm/pylib-crate/Lib/_codecs.py", line 463, in __call__
    return self._f(*args, **kwargs)
  File "/home/clemado1/workspace/RustPython/vm/pylib-crate/Lib/_codecs.py", line 421, in utf_16_le_encode
    res = bytes(res)
TypeError: Expected type 'int', not 'str'
---