Expressjs 4.0.0-rc3 - middlewares + sub router issue

index.js

process.env.DEBUG = '*'

var express = require('express')

var app = express()

var middleware = function(req, res, next) {
    console.log('Trying to put a middleware here')
    next(null)
},
middleware_copy = function(req, res, next) {
    console.log("That won't be showed")
    next(null)
}

app.get('/', middleware, function(req, res, next) {
    res.send(200)
})

var sub = express.Router()

// sub.route('/test').all(middleware, middleware_copy).get(function(req, res, next) {
//     res.send(200)
// })

// sub.route('/test').get(middleware, function(req, res, next) {
//     res.send(200)
// })

sub.get('/test', middleware, function(req, res, next) {
    res.send(200)
})

app.use('/sub', sub)

app.listen(3001)