[issue23840] tokenize.open() leaks an open binary file on TextIOWrapper error

[Serhiy Storchaka]

Changes by Serhiy Storchaka <storchaka at gmail.com>:


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components: +Library (Lib)
stage:  -> needs patch
type:  -> resource usage

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue23840>
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