Conference Notification does not work

[FelixPetriconi]

We have setup a conference and configured correctly an email server.

Whenever I select on the conference settings page the Notification tab I get the error message "We're sorry, but something went wrong. We've been notified about this issue and we'll take a look at it shortly."

Inside the log I see the following error message:

[9e0b53e4-143d-454f-9b3c-9e2f20e37026] ActionView::Template::Error (wrong number of arguments (given 2, expected 1)):
[9e0b53e4-143d-454f-9b3c-9e2f20e37026] 1: .bulk-notification
[9e0b53e4-143d-454f-9b3c-9e2f20e37026] 2: %h3= t('notifications_module.n_events_in_state_x', { count: e.count, state: t(state, scope: 'conferences_module') })
[9e0b53e4-143d-454f-9b3c-9e2f20e37026] 3: - subscribers = e.map { |e| e.subscribers.count }.sum
[9e0b53e4-143d-454f-9b3c-9e2f20e37026] 4: - nospeakers = e.select { |e| e.speakers.count == 0 }
[9e0b53e4-143d-454f-9b3c-9e2f20e37026] 5: - if nospeakers.count > 0
[9e0b53e4-143d-454f-9b3c-9e2f20e37026]
[9e0b53e4-143d-454f-9b3c-9e2f20e37026] app/views/conferences/_notification_section.html.haml:2
[9e0b53e4-143d-454f-9b3c-9e2f20e37026] app/views/conferences/edit_notifications.html.haml:19

We are on this source code revision: ACCUConf@32008a7

We are using these versions:
ruby 3.0.0p0 (2020-12-25 revision 95aff21468) [x86_64-linux]

[FelixPetriconi]

Update: After further investigation I found out that the problem appears in Ruby 3.0.0, but not in Ruby 2.7.0
For the moment I switched to the older version.

[erdgeist]

Looking at https://stackoverflow.com/a/71239392 I see the problem. Will provide a fix.

[erdgeist]

Look here #942

[manno]

Even more of those: #944