I can't upload this JPEG about django-images HOT 2 CLOSED

  File "/Users/vit/.virtualenvs/oboiray/lib/python2.7/site-packages/django/core/handlers/base.py", line 111, in get_response
    response = callback(request, *callback_args, **callback_kwargs)
  File "/Users/vit/projects/oboiray.ru/oboi/shared/django_images/views.py", line 12, in thumbnail
    return redirect(models.Thumbnail.objects.get_or_create_at_size(image.id, size))
  File "/Users/vit/projects/oboiray.ru/oboi/shared/django_images/models.py", line 84, in get_or_create_at_size
    thumbnail = image.thumbnail_set.create(size=size, image=thumb_file)
  File "/Users/vit/.virtualenvs/oboiray/lib/python2.7/site-packages/django/db/models/fields/related.py", line 485, in create
    return super(RelatedManager, self.db_manager(db)).create(**kwargs)
  File "/Users/vit/.virtualenvs/oboiray/lib/python2.7/site-packages/django/db/models/manager.py", line 137, in create
    return self.get_query_set().create(**kwargs)
  File "/Users/vit/.virtualenvs/oboiray/lib/python2.7/site-packages/django/db/models/query.py", line 375, in create
    obj = self.model(**kwargs)
  File "/Users/vit/.virtualenvs/oboiray/lib/python2.7/site-packages/django/db/models/base.py", line 369, in __init__
    signals.post_init.send(sender=self.__class__, instance=self)
  File "/Users/vit/.virtualenvs/oboiray/lib/python2.7/site-packages/django/dispatch/dispatcher.py", line 172, in send
    response = receiver(signal=self, sender=sender, **named)
  File "/Users/vit/.virtualenvs/oboiray/lib/python2.7/site-packages/django/db/models/fields/files.py", line 378, in update_dimension_fields
    width = file.width
  File "/Users/vit/.virtualenvs/oboiray/lib/python2.7/site-packages/django/core/files/images.py", line 15, in _get_width
    return self._get_image_dimensions()[0]
TypeError: 'NoneType' object is not subscriptable