fn main() {
    let mut _2d = Vec::new();
    _2d.push(Vec::new());
    match _2d.last() {
        Some(v) => v.push(1i),
        None => ()
    }
    println!("{}", _2d);
}

test.rs:6:20: 6:21 error: cannot borrow immutable dereference of `&`-pointer `*v` as mutable
test.rs:6         Some(v) => v.push(1i),

test.rs:6:14: 6:20 error: cannot move out of dereference of `&`-pointer
test.rs:6         Some(&mut v) => v.push(1i),
                       ^~~~~~
test.rs:6:15: 6:20 note: attempting to move value to here (to prevent the move, use `ref v` or `ref mut v` to capture value by reference)
test.rs:6         Some(&mut v) => v.push(1i),

test.rs:6:15: 6:24 error: cannot borrow immutable dereference of `&`-pointer as mutable
test.rs:6         Some(&ref mut v) => v.push(1i),

fn main() {
    let mut _2d = Vec::new();
    _2d.push(Vec::new());
    match _2d.last_mut() {
        Some(v) => v.push(1),
        None => ()
    }
    println!("{:?}", _2d);
}

fn main() {
    let vec_2d = vec![vec![1i32]];

    println!("{:?}", vec_2d);
}