[issue12437] _ctypes.dlopen does not include errno in OSError

[Santoso Wijaya]

Santoso Wijaya <santoso.wijaya at gmail.com> added the comment:

At least in Windows, the exception object has its `winerror` attribute correctly set to 126, which is also translated to POSIX `errno` with `winerror_to_errno()`; the latter gives us EINVAL (22).

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versions: +Python 3.3

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