[issue27803] ctypes automatic byref failing on custom classes attributes

[Eryk Sun]

Change by Eryk Sun <eryksun at gmail.com>:


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versions: +Python 3.10, Python 3.8, Python 3.9 -Python 2.7, Python 3.5

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue27803>
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