[issue29581] __init_subclass__ causes TypeError when used with standard library metaclasses (such as ABCMeta)

[Serhiy Storchaka]

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


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status: open -> pending

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue29581>
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