src/test/ui/numeric/len.rs - third_party/rust - Git at Google

 fn main() {
     let array = [1, 2, 3];
     test(array.len()); //~ ERROR mismatched types
 }

 fn test(length: u32) {
     println!("{}", length);
 }
	fn main() {
	let array = [1, 2, 3];
	test(array.len()); //~ ERROR mismatched types
	}

	fn test(length: u32) {
	println!("{}", length);
	}