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[3.13] gh-113841: fix possible undefined division by 0 in _Py_c_pow() (GH-127211) #127216

Open miss-islington opened 1 day ago

miss-islington commented 1 day ago

x**y == 1/x**-y thus changing /= to *= by negating the exponent. (cherry picked from commit f7bb658124aba74be4c13f498bf46cfded710ef9)

Co-authored-by: Sergey B Kirpichev skirpichev@gmail.com