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Copy file name to clipboardExpand all lines: doc/source/whatsnew/v2.1.0.rst
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^^^^^^^^^
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- Bug in :func:`concat` coercing to ``object`` dtype when one column has ``pa.null()`` dtype (:issue:`53702`)
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- Bug in :func:`crosstab` when ``dropna=False`` would not keep ``np.nan`` in the result (:issue:`10772`)
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- Bug in :func:`melt` where the ``variable`` column would lose extension dtypes (:issue:`54297`)
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- Bug in :func:`merge_asof` raising ``KeyError`` for extension dtypes (:issue:`52904`)
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- Bug in :func:`merge_asof` raising ``ValueError`` for data backed by read-only ndarrays (:issue:`53513`)
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- Bug in :func:`merge_asof` with ``left_index=True`` or ``right_index=True`` with mismatched index dtypes giving incorrect results in some cases instead of raising ``MergeError`` (:issue:`53870`)
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