// Test that a class with a non-copyable field can't be // copied #[derive(Debug)] struct Bar { x: isize, } impl Drop for Bar { fn drop(&mut self) {} } fn bar(x:isize) -> Bar { Bar { x: x } } #[derive(Debug)] struct Foo { i: isize, j: Bar, } fn foo(i:isize) -> Foo { Foo { i: i, j: bar(5) } } fn main() { let x = foo(10); let _y = x.clone(); //~ ERROR no method named `clone` found println!("{:?}", x); }