[issue1621] Do not assume signed integer overflow behavior

[Xiang Zhang]

Xiang Zhang added the comment:

Hmm, I don't tend to infer platform characteristics. IMHO, it's a simple problem: sum up two lists' length which may overflow in logic.

With your argument, does it means it seems somewhat meaningless to have a List a Py_ssize_t length since it can never reach it? Checks against PY_SSIZE_T_MAX have already existed (for example, in ins1).

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<http://bugs.python.org/issue1621>
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