[issue15994] memoryview to freed memory can cause segfault

[Stefan Krah]

Stefan Krah added the comment:

> But I think there should be some way of guaranteeing that a memoryview will not try to access memory which has already been freed.

Unless the "buffered *self" parameter in _buffered_raw_read() is
made a full PEP-3118 exporter, I'm not sure how it would be possible
to prevent all examples of this kind.

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nosy: +skrah

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<http://bugs.python.org/issue15994>
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