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[rust.git] / src / test / ui / type-alias-impl-trait / type-alias-impl-trait-with-cycle-error2.rs
1 #![feature(type_alias_impl_trait)]
2
3 pub trait Bar<T> {
4     type Item;
5 }
6
7 type Foo = impl Bar<Foo, Item = Foo>;
8 //~^ ERROR: unconstrained opaque type
9
10 fn crash(x: Foo) -> Foo {
11     x
12 }
13
14 fn main() {}