src/test/ui/borrowck/two-phase-multi-mut.rs - third_party/rust - Git at Google

 struct Foo {
 }

 impl Foo {
     fn method(&mut self, foo: &mut Foo) {
     }
 }

 fn main() {
     let mut foo = Foo { };
     foo.method(&mut foo);
     //~^     cannot borrow `foo` as mutable more than once at a time
     //~^^    cannot borrow `foo` as mutable more than once at a time
 }
	struct Foo {
	}

	impl Foo {
	fn method(&mut self, foo: &mut Foo) {
	}
	}

	fn main() {
	let mut foo = Foo { };
	foo.method(&mut foo);
	//~^ cannot borrow `foo` as mutable more than once at a time
	//~^^ cannot borrow `foo` as mutable more than once at a time
	}