CI: categorical failures

[mzeitlin11]

Seeing

~/work/pandas/pandas/pandas/core/indexes/base.py in get_indexer(self, target, method, limit, tolerance)
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   3411             # potential fastpath
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   3412             # get an indexer for unique categories then propagate to codes via take_nd
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-> 3413             categories_indexer = self.get_indexer(target.categories)
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   3414             indexer = algos.take_nd(categories_indexer, target.codes, fill_value=-1)
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   3415 
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RecursionError: maximum recursion depth exceeded while calling a Python object
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<<<-------------------------------------------------------------------------

along with a bunch of other categorical related failures. Guessing cause may be #41934, cc @jbrockmendel

[jbrockmendel]

is there a particular test i should run to reproduce locally?

[jbrockmendel]

never mind, found a bunch

[jbrockmendel]

Tentatively Looks like changing self.get_indexer(target.categories) to self._get_indexer(target.categories) in indexes.base L3413 does the trick, I'll make a PR shortly.