// [next] compile-flags: -Zlower-impl-trait-in-trait-to-assoc-ty // revisions: current next #![feature(return_position_impl_trait_in_trait)] #![allow(incomplete_features)] struct Wrapper(T); trait Foo { fn bar() -> Wrapper; } impl Foo for () { fn bar() -> i32 { //~^ ERROR method `bar` has an incompatible return type for trait 0 } } fn main() {}