[issue1573] Improper use of the keyword-only syntax makes the parser crash

[Christian Heimes]

Christian Heimes added the comment:

Ah, you and Amaury are right! But I don't like Amaury's error message:

    SyntaxError: no name for vararg

It doesn't explain what's wrong. How about

    SyntaxError: keyword only arguments require at least one keyword

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Tracker <report at bugs.python.org>
<http://bugs.python.org/issue1573>
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