OS: Windows 10 RS4
Rust version: 1.29.0-nightly (866a71325 2018-07-29)
RLS version: 0.129.0-nightly (4c7cc91 2018-07-29)

I have a crate with only one main.rs follow with the following contents:

#[macro_use]
extern crate structopt;
extern crate uuid;

use structopt::StructOpt;
use uuid::Uuid;

#[derive(StructOpt, Debug)]
#[structopt(name = "guids")]
struct App {
    #[structopt(short="g", long="guid")]
    input: Option<String>,

    #[structopt(short="i", long="invert", requires="c_style")]
    invert: bool,

    #[structopt(short="c", long="c-style")]
    c_style: bool,
}


fn main() {
    
    let app: App = App::from_args();
}

I see different completion behavior depending on line endings. If I type the letter "U" in the main function's empty line with CRLF line endings I get fairly complete completions (Uuid, unimplemented!, and a bunch of module suggestions). However if the file has LF line endings the only suggestion I get is for Uuid.