src/test/ui/type-alias-impl-trait/generic_duplicate_param_use10.rs

// build-pass (FIXME(62277): could be check-pass?)
#![feature(type_alias_impl_trait)]

use std::fmt::Debug;

fn main() {}

type Two<T, U> = impl Debug;

fn two<T: Debug, U: Debug>(t: T, _: U) -> Two<T, U> {
    (t, 4u32)
}