[issue19568] bytearray_setslice_linear() leaves the bytearray in an inconsistent state on memory allocation failure

[Stefan Krah]

Stefan Krah added the comment:

> With the patch, the deletion succeeded even if you get a MemoryError. The bytearray object is consistent. It's just that its buffer could be smaller (it wastes memory).

I think intuitively I'd expect the object to be unmodified if there
is any error.

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nosy: +skrah

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<http://bugs.python.org/issue19568>
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