rectangles_bad.rs

//src/main.rs
mod rectangle;

fn main() {
    println!("Hello, world!");
}

//src/point.rs
#[derive(Debug)] 
pub struct Point {
    x: i32,
    y: i32
}

//src/rectangle.rs
use point::Point; 

#[derive(Debug)]
pub struct Rectangle {
    lower_left : Point, 
    upper_right : Point
}