These are the changes in pandas 1.5.2. See :ref:`release` for a full changelog including other versions of pandas.
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- Bug in :meth:`DataFrame.merge` which also affected :meth:`DataFrame.join`, when joining over index on one :class:`DataFrame` and column on the other :class:`DataFrame` returned incorrectly (:issue:`28243`, :issue:`15692`, :issue:`17257`)
.. contributors:: v1.5.1..v1.5.2|HEAD