[issue31718] some methods of uninitialized io.IncrementalNewlineDecoder objects raise SystemError

[Oren Milman]

Change by Oren Milman <orenmn at gmail.com>:


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keywords: +patch
pull_requests: +3886
stage:  -> patch review

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue31718>
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