[issue22605] memcpy(NULL, NULL, 0) in array_new()

[Jakub Wilk]

New submission from Jakub Wilk:

If you initialize array with another empty array, then this code runs:

    memcpy(self->ob_item, other->ob_item, len * other->ob_descr->itemsize);

But self->ob_item and other->ob_item are NULL in such case.
Passing null pointer to memcpy() is undefined behavior even when length is 0.

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title: memcpy(NULL, NULL, 0) in -> memcpy(NULL, NULL, 0) in array_new()

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue22605>
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