'No crash on a column with equal values and with selected option
normalize by standard deviation.
GH-2144'

def test_one_column_equal_values(self):

    table = Table('iris')
    table = table[:, 1]
    table[:] = 42.0
    self.send_signal(self.widget.Inputs.data, table)
    self.widget.continuous_treatment = 2
    self.widget.unconditional_commit()
