Exception when running the "Find duplicate songs" wizard

[Samuel Mehrbrodt]

Traceback (most recent call last):
  File "/home/samuel/programming/openlp/bug-1316979/openlp/core/ui/wizard.py", line 221, in on_current_id_changed
    self.custom_page_changed(page_id)
  File "/home/samuel/programming/openlp/bug-1316979/openlp/plugins/songs/forms/duplicatesongremovalform.py", line 211, in custom_page_changed
    self.process_current_duplicate_entry()
  File "/home/samuel/programming/openlp/bug-1316979/openlp/plugins/songs/forms/duplicatesongremovalform.py", line 342, in process_current_duplicate_entry
    song_review_widget = SongReviewWidget(self.review_page, duplicate)
  File "/home/samuel/programming/openlp/bug-1316979/openlp/plugins/songs/forms/songreviewwidget.py", line 66, in __init__
    self.setupUi()
  File "/home/samuel/programming/openlp/bug-1316979/openlp/plugins/songs/forms/songreviewwidget.py", line 132, in setupUi
    authors_text = ', '.join([author.display_name for author in self.song.authors])
  File "/usr/local/lib/python3.4/dist-packages/sqlalchemy/orm/attributes.py", line 233, in __get__
    return self.impl.get(instance_state(instance), dict_)
  File "/usr/local/lib/python3.4/dist-packages/sqlalchemy/orm/attributes.py", line 579, in get
    value = self.callable_(state, passive)
  File "/usr/local/lib/python3.4/dist-packages/sqlalchemy/orm/strategies.py", line 478, in _load_for_state
    (orm_util.state_str(state), self.key)
sqlalchemy.orm.exc.DetachedInstanceError: Parent instance <Song at 0x7f91821cec50> is not bound to a Session; lazy load operation of attribute 'authors' cannot proceed

[Tim Bentley (trb143)]

Please confirm this is still a problem

[Samuel Mehrbrodt (sam92)]

This has been fixed in the meantime (don't know by which commit exactly)