fn main() {
    let y = 2 + {4};
    mod foo {
        pub const FOO: i32 = 2;
    }

    println!("{}", y + foo::FOO);
    const BAR: i32 = 10;
    let foo = 2;
    let bar = foo::FOO;

    let tmp = {let _b = ();};
    {;;;;;}
    {()}
    {}
}