Message 289660 - Python tracker

> I think an OverflowError is appropriate here for denoting the platform and implementation limitation.

It's common that integer overflow on memory allocation in C code raises a MemoryError, not an OverflowError.

>>> "x" * (2**60)
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
MemoryError

I suggest to raise a MemoryError.