   1 + /// A rectangle. First line is changed to prevent a regression of #1869
   2   struct Rectangle {
   3       width: u32,
   4       height: u32,
   5   }
   6   
   7 _ fn main() {
   8       let rect1 = Rectangle { width: 30, height: 50 };
   9   
  10       println!(
  11 ~         "The perimeter of the rectangle is {} pixels.",
  12 ~         perimeter(&rect1)
  13       );
  14 +     println!(r#"This line contains invalid utf8:  "�����"#;
  15   }
  16   
  17   fn area(rectangle: &Rectangle) -> u32 {
  18       rectangle.width * rectangle.height
  19   }
  20 + 
  21 + fn perimeter(rectangle: &Rectangle) -> u32 {
  22 +     (rectangle.width + rectangle.height) * 2
  23 + }
