[issue22719] os.path.isfile & os.path.exists bug in while loop

[eryksun]

eryksun added the comment:

> i.e. the object id is the same after appending

Actually, that's wrong. bak_path is a compact string. So the whole object is realloc'd, and the base address (i.e. id) could change. Check PyUnicode_AsUnicode even if the id changes.

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue22719>
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