Is there a problem in the test cases in 23_conversions: as_ref_mut.rs or conversion5.rs

[iberniex]

I might be asking something bad or not idk but when I was doing the conversion5.rs exercise, the testcase on the sqrt case for the usage of the AsMut trait, it looks like this

#[test]
    fn mut_box() {
        let mut num: Box<u32> = Box::new(3);
        num_sq(&mut num);
        assert_eq!(*num, 9);
//                 ^^^^ -> this is referencing the box value instead of the num_sq value
    }
}

but should it have the squared value instead of the previous value?

i did this change and it worked

#[test]
    fn mut_box() {
        let mut num: Box<u32> = Box::new(3);
        assert_eq!(num_sq(&mut num), 9);
    }
}

[iberniex]

Oh never mind. I got lost in the sauce. you dereference the argument and then you do the compound multiplication assignment operation. My bad :-P