django.contrib.auth.views.login no response

I'm trying to build a login form by following the instructions on this page https://docs.djangoproject.com/en/dev/topics/auth/#django.contrib.auth.views.login. The form is rendered in the template with a username and password field, but the hidden "next" field has no value, the form does not return error messages and there's no response on submit. Here is my code:

urls.py

urlpatterns = patterns('',

    url(r'^accounts/login/$', 'django.contrib.auth.views.login', {

        'template_name': 'accounts/login.html'

    }

)

templates/accounts/login.html

{% extends 'base.html' %}

{% load url from future %}

{% block content %}

{% if form.errors %}

<p>Your username and password didn't match. Please try again.</p>

{% endif %}

<form method="post" action="{% url 'django.contrib.auth.views.login' %}">

    {% csrf_token %}

    <div class="form-item">

    {{ form.username.label_tag }}

    {{ form.username }}

    </div>

    <div class="form-item">

    {{ form.password.label_tag }}

    {{ form.password }}

    </div>

    <input type="submit" value="login" />

    <input type="hidden" name="next" value="{{ next|escape }}" />

</form>

{% endblock %}

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