pub struct Test2 {
    a int
}

pub struct Test {
    a Test2
    b ?string
    c ?Test2
    d ?&Test2
}

@[manualfree]
fn test_main() {
    t := Test{
        b: 'b'
    }

    println('t: ${t}')

    defer {
        unsafe {
            t.free()
        }
    }

    mut t2 := ?Test(Test{
        b: 'b'
    })
    println('t: ${t2}')

    defer {
        unsafe {
            if t2 != none {
                t2.free()
            }
        }
    }
}