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//@ revisions: current negative
#![feature(specialization)]
#![cfg_attr(negative, feature(with_negative_coherence))]
#![allow(incomplete_features)]
pub trait Trait<T> {}
default impl<T, U> Trait<T> for U {}
impl<T> Trait<<T as Iterator>::Item> for T {}
//~^ ERROR conflicting implementations of trait `Trait<_>`
fn main() {}
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