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//@ check-pass
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#![feature(auto_traits)]
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#![feature(negative_impls)]
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auto trait NotSame {}
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impl<A> !NotSame for (A, A) {}
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trait OneOfEach {}
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impl<A> OneOfEach for (A,) {}
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impl<A, B> OneOfEach for (A, B)
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where
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(B,): OneOfEach,
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(A, B): NotSame,
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{
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}
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fn main() {}
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