David Edelsohn <dje....@gmail.com> added the comment:

Tony, Please see my reply from 2020-02-05.  This is a known "bug" in Python 
ctypes.  This is documented in Python ctypes.  This will not be fixed.  This 
cannot be fixed.

Python ctypes converts the array to a structure and creates an incorrect libffi 
descriptor.  The call to libffi creates a "fake" descriptor (description of the 
arguments) that doesn't match the actual data.  It cannot work.

This should be closed as "wont fix".

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Python tracker <rep...@bugs.python.org>
<https://bugs.python.org/issue38628>
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