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I encountered this error in my own extension module, but it can be easily demonstrated using the _tesbuffer module that is included with Python 3.4:
>>> import _testbuffer, numpy
>>> nd = _testbuffer.ndarray(list(range(6)), shape=[2,3],
... format='i', flags=_testbuffer.ND_PIL)
>>> numpy.array(nd)
array([[-1974954736, 32754, -1974954724],
[-1974954724, 32754, 0]], dtype=int32)
It looks like numpy fails to implement proper pointer dereferencing in the presence of suboffsets. In this case
>>> nd.suboffsets
(0, -1)
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