[issue32869] Incorrect dst buffer size for MultiByteToWideChar in _Py_fopen_obj

[Alexey Izbyshev]

New submission from Alexey Izbyshev <izbyshev at ispras.ru>:

MultiByteToWideChar expects the destination buffer size to be given in wide characters, not bytes.

This is currently not a real issue since _Py_fopen_obj is only used internally with mode being a short constant string in all call sites I've found.

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components: IO, Windows
messages: 312314
nosy: izbyshev, paul.moore, steve.dower, tim.golden, vstinner, zach.ware
priority: normal
severity: normal
status: open
title: Incorrect dst buffer size for MultiByteToWideChar in _Py_fopen_obj
type: enhancement
versions: Python 3.6, Python 3.7

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue32869>
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