Error:

Caught exception in MusicBrainz::Server::Controller::ReleaseEditor::Edit->edit "Can't call method "add_error" on an undefined value at /home/musicbrainz/musicbrainz-server/script/../lib/MusicBrainz/Server/Form/ReleaseEditor/Tracklist.pm line 234."

Stack trace:

line 234 MusicBrainz::Server::Form::ReleaseEditor::Tracklist
line 105 MusicBrainz::Server::Form
line 524 MusicBrainz::Server::Wizard
line 238 MusicBrainz::Server::Wizard
line 173 MusicBrainz::Server::Wizard
line 388 MusicBrainz::Server::Wizard
line 132 MusicBrainz::Server::Wizard
line 91 MusicBrainz::Server::Wizard::ReleaseEditor
line 17 MusicBrainz::Server::Controller::ReleaseEditor::Edit
line 258 MusicBrainz::Server

Request data:
$VAR1 = {
'query_parameters' => {},
'body_parameters' => {
'artist_credit.names.0.name' => 'Only Living Boy',
'packaging_id' => '',
'next' => "Next \x

",
'date.month' => '6',
'release_group_id' => '1084841',
'labels.0.catalog_number' => '',
'release_group.name' => 'Hide Nothing',
'artist_credit.names.0.artist.id' => '818706',
'labels.0.deleted' => '0',
'country_id' => '',
'labels.0.name' => '',
'date.year' => '2011',
'script_id' => '28',
'status_id' => '1',
'date.day' => '18',
'name' => 'Hide Nothing',
'barcode' => '',
'artist_credit.names.0.join_phrase' => '',
'labels.0.label_id' => '',
'wizard_session_id' => '0.461457626020369',
'language_id' => '120',
'comment' => '',
'gc-mode' => 'English',
'artist_credit.names.0.artist.name' => 'Only Living Boy',
'annotation' => ''
}
};

URL:http://musicbrainz.org/release/43583754-c92e-4fb7-8dc5-cda26953205a/edit