DEBUG:mediagoblin.gmg_commands.dbupdate:No models found for mediagoblin.media_types.pdf: No module named dateutil.parser

After manual pip install python-dateutil all works, but still why it was removed?

I tried new instalation on debian, every stopped with error Attachment is included

How to Reproduce

• As logged-in user
• Search for tickets by tag 'privacy' ("https://issues.mediagoblin.org/query?status=!closed&keywords=~privacy")
• Set: Status [] accepted [] closed [x] in_progress [x] new [x] review
• Click 'Update'

Expected Outcome

• See tickets that are tagged with 'privacy'

Actual Outcome

Error (see below)::

While doing a GET operation on /query, Trac issued an internal error.

(please provide additional details here)

Request parameters:

{'keywords': [u'~privacy', u'~privacy'],
 'order': [u'priority?status=in_progress', u'priority'],
 'status': [u'in_progress', u'new', u'review', u'new', u'review']}

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.6; rv:29.0) Gecko/20100101 Firefox/29.0

System Information

System information not available

Enabled Plugins

Plugin information not available

Python Traceback

Traceback (most recent call last):
  File "/usr/lib/python2.7/dist-packages/trac/web/main.py", line 497, in _dispatch_request
    dispatcher.dispatch(req)
  File "/usr/lib/python2.7/dist-packages/trac/web/main.py", line 214, in dispatch
    resp = chosen_handler.process_request(req)
  File "/usr/lib/python2.7/dist-packages/trac/ticket/query.py", line 942, in process_request
    max)
  File "/usr/lib/python2.7/dist-packages/trac/ticket/query.py", line 77, in __init__
    self.order = synonyms.get(order, order)     # 0.11 compatibility
TypeError: unhashable type: 'list'