Unexpected keyword `use`

[bozdoz]

Input code

fn parse_data(data: &str) -> impl Iterator<Item = Vec<isize>> +  use<'_> {
    data.lines().map(|x| {
        x.split_ascii_whitespace()
            .map(|y| { y.parse::<isize>().expect("I thought this was a number") })
            .collect::<Vec<isize>>()
    })
}

Output code

fn parse_data(data: &str) -> impl Iterator<Item = Vec<isize>> +  use<'_> {
    data.lines().map(|x| {
        x.split_ascii_whitespace()
            .map(|y| { y.parse::<isize>().expect("I thought this was a number") })
            .collect::<Vec<isize>>()
    })
}

Additional context

Says use is unexpected:

[eerz]

why is no one looking into this?, this NEEDS to be fixed ASAP, use<> is literally a feature of rust in the official release now