rocket_codegen lints fail to handle unresolved HIR paths leading to failed compilation

[Lapz]

Bug Report

1. Rocket v 0.3.0, Rust: 1.21.0-nightly (aac223f4f 2017-07-30)

2. macOS Sierra v 10.12.6

3. Rocket codegen enters unreachable code that crashes the compiler

4. I've an example in this repo

5. Rocket codegen enters unreachable code. It seems to be that there is a case that is reached that is covered by the unreachable! macro in the rocket_codegen lint and this causes the compiler to crash.

[SergioBenitez]

What code is being compiled?

[Lapz]

This is the code thats being compiled

use rocket::config::{Config, Environment};


#[get("/hello")]
fn hello() -> &'static str {
    "Hello, world!"
}


fn main() {


    let config = Config::build(Environment::Staging)
                .address("localhost")
                .port(3000)
                .finalize()
                .unwrap();
    

    // rocket::custom(config, false).mount("/", routes![hello]); // This compiles properly 

    rocket::Rocket::custom(config,false).mount("/", routes![hello]); // This causes an error and does not compile due to the unreachable! in the lint
}

[SergioBenitez]

Ah, I see. Change rocket::Rocket::custom to rocket::custom. Does the error go away?

Missed your answer in the text. Looks good! Should be a very simple fix.

[SergioBenitez]

Confirmed. Fix is incoming.