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// check-pass
// compile-flags: -Z parse-only
use std::ops::Deref;
use std::fmt::Debug;
trait Foo {
type Bar<'a>;
type Bar<'a, 'b>;
type Bar<'a, 'b,>;
type Bar<'a, 'b, T>;
type Bar<'a, 'b, T, U>;
type Bar<'a, 'b, T, U,>;
type Bar<'a, 'b, T: Debug, U,>;
type Bar<'a, 'b, T: Debug, U,>: Debug;
type Bar<'a, 'b, T: Debug, U,>: Deref<Target = T> + Into<U>;
type Bar<'a, 'b, T: Debug, U,> where T: Deref<Target = U>, U: Into<T>;
type Bar<'a, 'b, T: Debug, U,>: Deref<Target = T> + Into<U>
where T: Deref<Target = U>, U: Into<T>;
}
fn main() {}
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