numpy masked array bug

nump_mask_view_bug.txt

>>> import numpy as np
>>> arr = np.ma.array([1, 2, 3, 4], mask=[False, True, False, True])
>>> arr2 = arr.reshape((2, 2))
>>> arr2
masked_array(data =
 [[1 --]
 [3 --]],
             mask =
 [[False  True]
 [False  True]],
       fill_value = 999999)

>>> arr2[:] = 10
>>> arr
masked_array(data = [10 -- 10 --],
             mask = [False  True False  True],
       fill_value = 999999)

>>> arr2
masked_array(data =
 [[10 10]
 [10 10]],
             mask =
 [[False False]
 [False False]],
       fill_value = 999999)