Initialization checks for fixed size arrays not initialized during declaration always fails

[prajwalkman]

Uninitialized fixed size arrays always throw Use of possibly uninitialized variable errors, even if all the indices are allocated. Is there a way around this? If not, it shouldn't be possible to create uninitialized fixed size arrays.

struct Num {s: int}

fn main() {
    let s = box Num {s: 5};
    let mut a: [&Num, ..5];
    a[0] = &*s;    a[1] = &*s;    a[2] = &*s;    a[3] = &*s;    a[4] = &*s;

    println!("{}", a[0].s) // error: use of possibly uninitialized variable: `a[..].s`

}

[alexcrichton]

Closing as working as intended. In Rust you generally can't deal with uninitialized memory. If Num had a destructor then it would destruct invalid memory if one of the initializations initiated task failure.

For fixed size arrays you'll have to explicitly assign each element upon creation.