[issue29816] Get rid of C limitation for shift count in right shift

[Serhiy Storchaka]

Serhiy Storchaka added the comment:

Unfortunately it is hard to totally avoid OverflowError in right shift. Righ shift of huge positive value can get non-zero result even if shift count is larger than PY_SSIZE_T_MAX. PR 680 just decreases the opportunity of getting a OverflowError.

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stage: needs patch -> patch review

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue29816>
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