rustc compiler bug?

[baladithyab]

Compiling diesel_tut v0.1.0 (/home/codeseys/Documents/Rust/diesel_tut)
error: internal compiler error: src/librustc/ty/query/plumbing.rs:1195: Cannot force dep node: coherent_trait(core[c27c]::ops[0]::drop[0]::Drop[0])

thread 'rustc' panicked at 'Box', src/librustc_errors/lib.rs:635:9
note: Run with RUST_BACKTRACE=1 environment variable to display a backtrace.
error: aborting due to previous error

note: the compiler unexpectedly panicked. this is a bug.

note: we would appreciate a bug report: https://github.com/rust-lang/rust/blob/master/CONTRIBUTING.md#bug-reports

note: rustc 1.35.0-nightly (acd8dd6 2019-04-05) running on x86_64-unknown-linux-gnu

note: compiler flags: -C debuginfo=2 -C incremental --crate-type bin

note: some of the compiler flags provided by cargo are hidden

error: Could not compile diesel_tut.

To learn more, run the command again with --verbose.

I got this with

#![feature(proc_macro_hygiene, decl_macro)]

#[macro_use] extern crate rocket;
extern crate rocket_contrib;
extern crate serde;

#[macro_use]
extern crate serde_derive;

use rocket_contrib::templates::Template;
use rocket::request::Form;

#[derive(Serialize)]
struct Context {
    header: String,
}

#[derive(FromForm)]
struct User{
    username: String,
    password: String,
}

#[get("/")]
fn index() -> Template {
    let context = Context {
        header: "Hello!".to_string(),
    };
    Template::render("index", &context)
}

#[post("/")]
fn login(userdata: Form<User>) -> String{
    format!("Hello {}", userdata.username);
}

fn main() {
    rocket::ignite().mount("/", routes![index]).attach(Template::fairing()).launch();
}

but instead of compiling it gave me the above error/bug

I'm running rustc 1.35.0-nightly (acd8dd6 2019-04-05) running on x86_64-unknown-linux-gnu

I don't know what's happening but I had issues with windows not letting me access the .env file i had in the project directory with dotenv so i moved to ubuntu18.04 but now this issue pops up.
PLZ HALP!!

[jonas-schievink]

duplicate of #59731