[issue35504] `del OSError().characters_written` raises `SystemError`

[Zackery Spytz]

Zackery Spytz <zspytz at gmail.com> added the comment:

PR 11175 fixes some other related SystemErrors (and segfaults).

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nosy: +ZackerySpytz

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue35504>
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