[issue40596] str.isidentifier() does not work with non-BMP non-canonicalized strings on Windows

[Serhiy Storchaka]

Serhiy Storchaka <storchaka+cpython at gmail.com> added the comment:

I am not sure that changes in issue39500 was correct. It is easier to catch a bug if crash consistently when you pass a non-canonicalized strings then if silently return a wrong result for specific input on particular platform.

Alternatively, you could reimplement correct handling of surrogate pairs in  PyUnicode_IsIdentifier().

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue40596>
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