Bug in Pandas 1.3.0 block manager breaks tests for TensorArray

[frreiss]

The test cases under TestPandasSetitem.test_setitem_series() fail on Pandas 1.3.0 due to pandas-dev/pandas#42437.

These tests create a Series of dtype object and attempt to assign a TensorArray to that series. They fail because Pandas passes the TensorArray through numpy.asarray(), which turns the TensorArray into a 2D ndarray instead of a 1D array of ndarray objects.

Users should be able to work around this issue for now by explicitly casting TensorArrays to dtype of object, then performing the assignment.

[frreiss]

Tests temporarily disabled in 50a985e

[frreiss]

Keep this issue open until the upstream bug is patched, then re-enable the tests, then close this issue.