CI run

___________________________ test_date2num_dst_pandas ___________________________
[gw0] linux -- Python 3.11.17 /opt/hostedtoolcache/Python/3.11.17/x64/bin/python

pd = <module 'pandas' from '/opt/hostedtoolcache/Python/3.11.17/x64/lib/python3.11/site-packages/pandas/__init__.py'>

    def test_date2num_dst_pandas(pd):
        # Test for github issue #3896, but in date2num around DST transitions
        # with a timezone-aware pandas date_range object.
    
        def tz_convert(*args):
            return pd.DatetimeIndex.tz_convert(*args).astype(object)
    
>       _test_date2num_dst(pd.date_range, tz_convert)

lib/matplotlib/tests/test_dates.py:1063: 
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 
lib/matplotlib/tests/test_dates.py:983: in _test_date2num_dst
    dt_bxl = tz_convert(dt_utc, BRUSSELS)
             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
lib/matplotlib/tests/test_dates.py:1061: in tz_convert
    return pd.DatetimeIndex.tz_convert(*args).astype(object)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
/opt/hostedtoolcache/Python/3.11.17/x64/lib/python3.11/site-packages/pandas/core/indexes/base.py:1159: in astype
    new_values = values.astype(dtype, copy=copy)
                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
/opt/hostedtoolcache/Python/3.11.17/x64/lib/python3.11/site-packages/pandas/core/arrays/datetimes.py:764: in astype
    return dtl.DatetimeLikeArrayMixin.astype(self, dtype, copy)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
/opt/hostedtoolcache/Python/3.11.17/x64/lib/python3.11/site-packages/pandas/core/arrays/datetimelike.py:474: in astype
    converted = ints_to_pydatetime(
pandas/_libs/tslibs/vectorized.pyx:124: in pandas._libs.tslibs.vectorized.ints_to_pydatetime
    ???
pandas/_libs/tslibs/tzconversion.pyx:91: in pandas._libs.tslibs.tzconversion.Localizer.__cinit__
    ???
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 

>   ???
E   AttributeError: 'NoneType' object has no attribute 'total_seconds'

pandas/_libs/tslibs/timezones.pyx:475: AttributeError