Error reporting bug in JetBrains Rust Plugin

Cargo.toml

[package]
name = "ext-err"
version = "0.1.0"
edition = "2021"
[dependencies]
extend = "1.1.2"

main.rs

use extend::ext;

#[ext]
impl<T> Vec<T> {
    fn scramble(mut self) -> Self {
        let len = self.len();
        self.swap(0, len/2);
        self
    }
}

fn main() {
    let nums = vec![1, 2, 3, 4, 5];
    println!("{:?}", nums.scramble());
}