[issue20427] inspect.Signature should ensure that non-default params don't follow default ones

[Yury Selivanov]

Yury Selivanov added the comment:

New patch version: sig_validation_02.patch

This one is a bit more correct--it uses Parameter's private '_partial_kwarg' to correctly validate partial signatures.

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Added file: http://bugs.python.org/file33787/sig_validation_02.patch

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