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#![feature(supertrait_item_shadowing)]
#![warn(supertrait_item_shadowing_usage)]
#![warn(supertrait_item_shadowing_definition)]
struct W<T>(T);
trait Upstream {
fn hello(&self) {}
}
impl<T> Upstream for T {}
trait Downstream: Upstream {
fn hello(&self) {}
//~^ WARN trait item `hello` from `Downstream` shadows identically named item
}
impl<T> Downstream for W<T> where T: Foo {}
trait Foo {}
fn main() {
let x = W(Default::default());
x.hello();
//~^ ERROR the trait bound `i32: Foo` is not satisfied
//~| WARN trait item `hello` from `Downstream` shadows identically named item from supertrait
let _: i32 = x.0;
}
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