[issue3139] bytearrays are not thread safe

[Antoine Pitrou]

Antoine Pitrou <pitrou at free.fr> added the comment:

> In any case, the corresponding DECREF *does* exist: in memory_dealloc,
> PyBuffer_Release is invoked, which releases the reference.

I'm a bit confused. In the PyBuffer_Release implementation you
committed, there is no DECREF at all.

> > By the way, perhaps PyBuffer_Release should set view->obj and view->buf
> > to NULL (and view->len to -1?), it would be a simple way to signal that
> > the buffer can't be used anymore.
> 
> That can be done; it's again a separate patch.

Ok.

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