@[unsafe]
fn foo() int {
    mut static x := 42
    x++
    return x
}

fn xfoo() int {
    return unsafe { foo() }
}

fn test_static_vars_work() {
    assert xfoo() == 43
    assert xfoo() == 44
    assert xfoo() == 45
}

fn test_static_vars_in_unsafe_blocks() {
    f := fn () int {
        unsafe {
            mut static counter := 0
            counter++
            return counter
        }
    }
    assert f() == 1
    assert f() == 2
    dump(f()) // 3
}

@[unsafe]
fn next_fib() int {
    mut static fibs := []int{}
    if fibs.len == 0 {
        fibs << 1
        fibs << 1
    } else {
        fibs << fibs[fibs.len - 1] + fibs[fibs.len - 2]
    }
    return fibs[fibs.len - 1]
}

fn test_static_vars_with_array_initializers() {
    assert unsafe { next_fib() } == 1
    assert unsafe { next_fib() } == 2
    assert unsafe { next_fib() } == 3
    assert unsafe { next_fib() } == 5
}