[issue25498] Python 3.4.3 core dump with simple sample code

[Stefan Krah]

Stefan Krah added the comment:

If memoryview B is created from memoryview A, then B must be
registered with the same ManagedBuffer as A, otherwise the
whole scheme breaks down (PyMemoryView_FromObject() performs
this check).


PyMemoryView_FromBuffer() is really a legacy function that
should be only used for creating temporary views within a
function.  As far as I know, it has usually been used that
way from the start (since 3.0).

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