Incorrect type identification

client.rs

impl ConsumerId {
    pub fn new() -> Self {
        #[cfg(not(feature = "string-consumer-id"))]
        let consumer_id = Uuid::new_v4();
        #[cfg(feature = "string-consumer-id")]
        let consumer_id = {
            let length = 10;
            let mut rng = rand::thread_rng();
            let letters: Vec<char> = "ABCDEFGHIJKLMNOPQRSTUVWXYZ".chars().collect();
            (0..length)
                .map(|_| {
                    let random_index = rng.gen_range(0..letters.len());
                    letters[random_index]
                })
                .collect()
        };
        Self { id: consumer_id }
    }