Panic while getting remote

Cargo.toml

[package]
authors = ["mgoszcz2"]
name = "reactor"
version = "0.1.0"

[dependencies]
futures = "0.1.10"
tokio-core = "0.1.4"

remote.rs

extern crate tokio_core;
extern crate futures;

use tokio_core::reactor;
use futures::{Future, BoxFuture};
use futures::future::ok;

fn handler(handle: reactor::Remote) -> BoxFuture<(), ()> {
    handle.handle().unwrap(); // Panics here
    ok(()).boxed()
}

fn main() {
    let mut core = reactor::Core::new().unwrap();
    let remote = core.remote();
    assert!(Ok(()) == core.run(handler(remote)));
}