json schema validation Rust valico

Cargo.toml

[package]
name = "testvalico"
version = "0.1.0"
authors = ["Hugo Ledoux <[email protected]>"]
edition = "2018"

[dependencies]
valico = "3.0"
serde = "1.0"
serde_json = "1.0"

main.rs

extern crate serde_json;
extern crate valico;

// use serde_json::from_str;
use valico::json_schema;

use std::fs;

fn main() {
    let jsstr =
        fs::read_to_string("/Users/hugo/projects/cityjson/schemas/cityjson.min.schema.json")
            .expect("Unable to read file");
    let js: serde_json::Value = serde_json::from_str(&jsstr).expect("JSON was not well-formatted");

    let jstr = fs::read_to_string("/Users/hugo/temp/example2.json").expect("Unable to read file");
    let j: serde_json::Value = serde_json::from_str(&jstr).expect("JSON was not well-formatted");

    let mut scope = json_schema::Scope::new();
    let r_schema = scope.compile_and_return(js, true).ok().unwrap();

    let re = r_schema.validate(&j);
    println!("Is valid: {}", re.is_valid());
    // println!("{:?}", r_schema.validate(&j));

    println!("{}", re.errors.len());
    for each in re.errors.iter() {
        println!("{:?}", each);
    }
}