src/test/ui/associated-consts/associated-const-ambiguity-report.rs

trait Foo {
    const ID: i32;
}

trait Bar {
    const ID: i32;
}

impl Foo for i32 {
    const ID: i32 = 1;
}

impl Bar for i32 {
    const ID: i32 = 3;
}

const X: i32 = <i32>::ID; //~ ERROR E0034

fn main() {
    assert_eq!(1, X);
}