Authentication error when load 0.9 spec

[Tonal]

Authentication error when load 0.9 spec.

Code for reproduce bug (tx_error.py):
# -*- coding: utf-8 -*-
from twisted.internet.defer import inlineCallbacks
from twisted.internet import reactor
from twisted.internet.protocol import ClientCreator
from twisted.python import log

from txamqp.protocol import AMQClient
from txamqp.client import TwistedDelegate

import txamqp.spec

@inlineCallbacks
def gotConnection(conn, username, password):
    print "Connected to broker."
    yield conn.authenticate(username, password)
    print "Authenticated. Ready to receive messages"

    chan0 = yield conn.channel(0)
    yield chan0.connection_close()

    reactor.stop()

if __name__ == "__main__":

    host = 'localhost'
    port = 5672
    vhost = '/'
    username = 'guest'
    password = 'guest'
    SPEC = 'https://www.rabbitmq.com/resources/specs/amqp0-9.stripped.xml'
    #SPEC = 'https://www.rabbitmq.com/resources/specs/amqp0-9-1.xml'

    spec = txamqp.spec.load(SPEC)

    delegate = TwistedDelegate()

    d = ClientCreator(reactor, AMQClient, delegate=delegate, vhost=vhost,
        spec=spec).connectTCP(host, port)

    d.addCallback(gotConnection, username, password)

    def whoops(err):
        if reactor.running:
            log.err(err)
            reactor.stop()

    d.addErrback(whoops)

    reactor.run()

Console output:
$ python tx-error.py
Connected to broker.
Unhandled Error
Traceback (most recent call last):
Failure: txamqp.client.Closed: [Failure instance: Traceback (failure with no frames): <class 'twisted.internet.error.ConnectionLost'>: Connection to the other side was lost in a non-clean fashion.
]

In last trunk all work Ok.

ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: python-txamqp 0.6.1-0ubuntu2
ProcVersionSignature: Ubuntu 3.13.0-30.55-generic 3.13.11.2
Uname: Linux 3.13.0-30-generic x86_64
NonfreeKernelModules: fglrx wl
ApportVersion: 2.14.1-0ubuntu3.2
Architecture: amd64
CurrentDesktop: KDE
Date: Sat Jul 12 14:08:59 2014
InstallationDate: Installed on 2011-12-10 (944 days ago)
InstallationMedia: Kubuntu 11.10 "Oneiric Ocelot" - Release amd64 (20111012)
PackageArchitecture: all
SourcePackage: txamqp
UpgradeStatus: Upgraded to trusty on 2014-04-23 (80 days ago)