[issue17852] Built-in module _io can lose data from buffered files in reference cycles

[miss-islington]

Change by miss-islington <mariatta.wijaya+miss-islington at gmail.com>:


----------
nosy: +miss-islington
nosy_count: 13.0 -> 14.0
pull_requests: +22409
pull_request: https://github.com/python/cpython/pull/23527

_______________________________________
Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue17852>
_______________________________________