wasm-bindgen: cannot run the example js-hello

I have started learning wasm-bindgen recently.And even with first example js-hello-world there was a weird problem. https://github.com/rust-lang-nursery/rust-wasm

I did as was written, set rustc to nightly, then:

rustup target add wasm32-unknown-unknown
cargo install wasm-bindgen-cli
cargo new js-hello-world --lib

This is Cargo.toml:

[package]
name = "js-hello-world"
version = "0.1.0"
authors = ["Grigoriy Markelov <grigorijmarkelov@gmail.com>"]

[dependencies]
wasm-bindgen = "0.2.1"

[lib]
crate-type = ["cdylib"]

And lib.rs:

#![feature(proc_macro, wasm_custom_section, wasm_import_module)]
extern crate wasm_bindgen;

use wasm_bindgen::prelude::*;

#[wasm_bindgen]
extern {
        fn alert(s: &str);
}

#[wasm_bindgen]
pub fn greet(name: &str) {
        alert(&format!("Hello, {}!", name));
}

Now when I build:

cargo build --target=wasm32-unknown-unknown -vv

Compilation actually hangs not consuming even cpu resources:

Fresh unicode-xid v0.1.0 Fresh serde v1.0.37 Fresh fnv v1.0.6 Fresh num-traits v0.2.2 Fresh dtoa v0.4.2 Fresh itoa v0.4.1 Fresh proc-macro2 v0.3.6 Fresh serde_json v1.0.13 Fresh quote v0.5.1 Fresh syn v0.13.1 Fresh serde_derive_internals v0.23.0 Fresh serde_derive v1.0.37 Fresh wasm-bindgen-shared v0.2.1 Fresh wasm-bindgen-backend v0.2.1 Fresh wasm-bindgen-macro v0.2.1 Fresh wasm-bindgen v0.2.1 Compiling js-hello-world v0.1.0 (file:///home/markelovg/container/js-hello-world) Running rustc --crate-name js_hello_world src/lib.rs --crate-type cdylib --emit=dep-info,link -C debuginfo=2 -C metadata=a4ec1c36c55eb3a5 --out-dir /home/markelovg/container/js-hello-world/target/wasm32-unknown-unknown/debug/deps --target wasm32-unknown-unknown -C incremental=/home/markelovg/container/js-hello-world/target/wasm32-unknown-unknown/debug/incremental -L dependency=/home/markelovg/container/js-hello-world/target/wasm32-unknown-unknown/debug/deps -L dependency=/home/markelovg/container/js-hello-world/target/debug/deps --extern wasm_bindgen=/home/markelovg/container/js-hello-world/target/wasm32-unknown-unknown/debug/deps/libwasm_bindgen-a2e136f9a24e6618.rlib

This libwasm_bingden-a2e136f9a24e6618.rlib dependency exists in my project but nothing then happens.

In task manager I have lld -flavor wasm -L ~/.rustup/toolchain/nightly-i686-unknown-linux-gnu/lib/rustlib/wasm32-unknown-unknown/lib ~/myproject/target/wasm32-/debug/deps/longnames.rcgu.o etc and it doesn’t consume cpu