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// Coherence error results because we do not know whether `T: Foo<P>` or not
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// for the second impl.
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use std::marker::PhantomData;
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pub trait Foo<P> { fn foo() {} }
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impl <P, T: Foo<P>> Foo<P> for Option<T> {}
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impl<T, U> Foo<T> for Option<U> { }
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//~^ ERROR E0119
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fn main() {}
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