#![feature(specialization)] //~ WARN the feature `specialization` is incomplete trait Foo { fn foo() {} } impl<T: Clone> Foo for T {} impl<T> Foo for Vec<T> {} //~ ERROR E0119 trait Bar { fn bar() {} } impl<T> Bar for (T, u8) {} impl<T> Bar for (u8, T) {} //~ ERROR E0119 trait Baz<U> { fn baz() {} } impl<T> Baz<T> for u8 {} impl<T> Baz<u8> for T {} //~ ERROR E0119 trait Qux { fn qux() {} } impl<T: Clone> Qux for T {} impl<T: Eq> Qux for T {} //~ ERROR E0119 fn main() {}