Missing ref - field access in for loop

[nrc]

struct FrameBuffer {
    frame: Vec<f32>,
}

/// dfasf
pub fn main() {
    let output = FrameBuffer { frame: vec![0.0] };

    // println!("{:?}", output.frame);
    // let frame  = output.frame;

    for t in output.frame {
        println!("{}", t as i16);
    }
}

But the output in the for loop is fine, as are field accesses outside the for loop. Weird.

[nrc]

Another example, from rust-lang/rls#417

fn main() {
    use std::env;

    for arg in env::args().skip(1) { }
}

Here skip is missing info.