Environment:


Request Method: POST
Request URL: http://127.0.0.1:8000/submit/

Django Version: 1.6.2
Python Version: 3.4.0
Installed Applications:
('django.contrib.admin',
 'django.contrib.auth',
 'django.contrib.contenttypes',
 'django.contrib.sessions',
 'django.contrib.messages',
 'django.contrib.staticfiles',
 'mydjangoproject',
 'endless_pagination',
 'rest_framework',
 'haystack',
 'debug_toolbar')
Installed Middleware:
('debug_toolbar.middleware.DebugToolbarMiddleware',
 'django.contrib.sessions.middleware.SessionMiddleware',
 'django.middleware.common.CommonMiddleware',
 'django.middleware.csrf.CsrfViewMiddleware',
 'django.contrib.auth.middleware.AuthenticationMiddleware',
 'django.contrib.messages.middleware.MessageMiddleware',
 'django.middleware.clickjacking.XFrameOptionsMiddleware')


Traceback:
File "/Users/tao/.virtualenvs/mydjangoproject/lib/python3.4/site-packages/django/core/handlers/base.py" in get_response
  114.                     response = wrapped_callback(request, *callback_args, **callback_kwargs)
File "/Users/tao/dev/myproject/myapp/views.py" in submit
  136.             proposal.save()
File "/Users/tao/.virtualenvs/mydjangoproject/lib/python3.4/site-packages/django/db/models/base.py" in save
  545.                        force_update=force_update, update_fields=update_fields)
File "/Users/tao/.virtualenvs/mydjangoproject/lib/python3.4/site-packages/django/db/models/base.py" in save_base
  582.                                    update_fields=update_fields, raw=raw, using=using)
File "/Users/tao/.virtualenvs/mydjangoproject/lib/python3.4/site-packages/django/dispatch/dispatcher.py" in send
  185.             response = receiver(signal=self, sender=sender, **named)
File "/Users/tao/.virtualenvs/mydjangoproject/lib/python3.4/site-packages/haystack/signals.py" in handle_save
  48.                 index.update_object(instance, using=using)
File "/Users/tao/.virtualenvs/mydjangoproject/lib/python3.4/site-packages/haystack/indexes.py" in update_object
  274.                 backend.update(self, [instance])
File "/Users/tao/.virtualenvs/mydjangoproject/lib/python3.4/site-packages/haystack/backends/whoosh_backend.py" in update
  208.             writer.commit()
File "/Users/tao/.virtualenvs/mydjangoproject/lib/python3.4/site-packages/whoosh/writing.py" in commit
  1040.             self.writer.commit(*args, **kwargs)
File "/Users/tao/.virtualenvs/mydjangoproject/lib/python3.4/site-packages/whoosh/writing.py" in commit
  925.         finalsegments = self._merge_segments(mergetype, optimize, merge)
File "/Users/tao/.virtualenvs/mydjangoproject/lib/python3.4/site-packages/whoosh/writing.py" in _merge_segments
  830.         return mergetype(self, self.segments)
File "/Users/tao/.virtualenvs/mydjangoproject/lib/python3.4/site-packages/whoosh/writing.py" in MERGE_SMALL
  88.                 writer.add_reader(reader)
File "/Users/tao/.virtualenvs/mydjangoproject/lib/python3.4/site-packages/whoosh/writing.py" in add_reader
  710.         self.add_postings_to_pool(reader, basedoc, docmap)
File "/Users/tao/.virtualenvs/mydjangoproject/lib/python3.4/site-packages/whoosh/writing.py" in add_postings_to_pool
  634.         for item in items:
File "/Users/tao/.virtualenvs/mydjangoproject/lib/python3.4/site-packages/whoosh/writing.py" in _process_posts
  570.         for fieldname, text, docnum, weight, vbytes in items:
File "/Users/tao/.virtualenvs/mydjangoproject/lib/python3.4/site-packages/whoosh/reading.py" in iter_postings
  432.                 yield (fieldname, btext, m.id(), m.weight(), m.value())
File "/Users/tao/.virtualenvs/mydjangoproject/lib/python3.4/site-packages/whoosh/codec/whoosh3.py" in value
  928.             self._read_values()
File "/Users/tao/.virtualenvs/mydjangoproject/lib/python3.4/site-packages/whoosh/codec/whoosh3.py" in _read_values
  1049.             assert isinstance(vs, bytes_type)

Exception Type: AssertionError at /submit/
Exception Value: