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#![feature(type_alias_impl_trait)]
type Foo<'a, 'b> = impl std::fmt::Debug;
fn foo<'x, 'y>(i: &'x i32, j: &'y i32) -> (Foo<'x, 'y>, Foo<'y, 'x>) {
(i, i) //~ ERROR concrete type differs from previous
}
fn main() {}
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