rust/src/test/compile-fail/kindck-implicit-close-over-mut-var.rs

fn use(_i: int) {}

fn foo() {
    // Here, i is *moved* into the closure: Not actually OK
    let mut i = 0;
    do task::spawn {
        use(i); //~ ERROR mutable variables cannot be implicitly captured
    }
}

fn bar() {
    // Here, i would be implicitly *copied* but it
    // is mutable: bad
    let mut i = 0;
    while i < 10 {
        do task::spawn {
            use(i); //~ ERROR mutable variables cannot be implicitly captured
        }
        i += 1;
    }
}

fn car() {
    // Here, i is mutable, but *explicitly* copied:
    let mut i = 0;
    while i < 10 {
        do task::spawn |copy i| {
            use(i);
        }
        i += 1;
    }
}

fn main() {
}