Groovy Beta install error on OSX

edit

Following the instructions in section 2.2.2, the ROS-Comm install doesn't work. Going to http://packages.ros.org/web/rosinstall/generate/dry/raw/groovy/ros_comm returns the following error:

Environment:


Request Method: GET
Request URL: http://packages.ros.org/web/rosinstall/generate/dry/raw/groovy/ros_comm

Django Version: 1.4.2
Python Version: 2.6.5
Installed Applications:
('django.contrib.auth',
 'django.contrib.contenttypes',
 'django.contrib.sessions',
 'django.contrib.sites',
 'django.contrib.messages',
 'django.contrib.staticfiles',
 'dajaxice',
 'dajax',
 'prerelease_website.submit_jobs',
 'prerelease_website.rosinstall_gen')
Installed Middleware:
('django.middleware.common.CommonMiddleware',
 'django.contrib.sessions.middleware.SessionMiddleware',
 'django.middleware.csrf.CsrfViewMiddleware',
 'django.contrib.auth.middleware.AuthenticationMiddleware',
 'django.contrib.messages.middleware.MessageMiddleware')


Traceback:
File "/usr/local/lib/python2.6/dist-packages/django/core/handlers/base.py" in get_response
  111.                         response = callback(request, *callback_args, **callback_kwargs)
File "/var/www/prerelease_website/prerelease_website/rosinstall_gen/views.py" in dry_raw
  11.     rosinstall = generate_dry_rosinstall(distro, variant)
File "/var/www/prerelease_website/prerelease_website/rosinstall_gen/old_distro.py" in generate_dry_rosinstall
  14.                                                 variant_name=variant)
File "/usr/lib/pymodules/python2.6/rospkg/distro.py" in distro_to_rosinstall
  287.         stack_names = set(variant.get_stack_names(implicit=implicit))

Exception Type: AttributeError at /rosinstall/generate/dry/raw/groovy/ros_comm
Exception Value: 'NoneType' object has no attribute 'get_stack_names'

Both the full-desktop and desktop seem to work fine (they return a list of packages to install).