Array index len is taken before index/rhs is calulated, which may mutate the array

[aDotInTheVoid]

fn main () {
    let a = [1,2,3];
    a[3] = {
        a = [1,2,3,4];
        77
    };
    print a
}

fn main() {
    let a = [];
    print a[{
        a = [1];
        0
    }];
}

Both error, but should pass.

CC #43, this is a mess