ActiveSupport::Notifications will discontinue calling subscriber chain if any subscriber fails

output.txt

irb(main):001:0> load '/private/var/folders/9q/0tnb0bwj5514jj4xl440f4j80000gn/T/sample.rb'
publish done
1
2
into 3
Traceback (most recent call last):
       12: from /Users/johnkchow/.rbenv/versions/2.5.1/bin/irb:11:in `<main>'
       11: from (irb):1
       10: from (irb):1:in `load'
        9: from /private/var/folders/9q/0tnb0bwj5514jj4xl440f4j80000gn/T/foo.rb:22:in `<top (required)>'
        8: from /Users/johnkchow/.rbenv/versions/2.5.1/lib/ruby/gems/2.5.0/gems/activesupport-4.2.11/lib/active_support/notifications.rb:164:in `instrument'
        7: from /Users/johnkchow/.rbenv/versions/2.5.1/lib/ruby/gems/2.5.0/gems/activesupport-4.2.11/lib/active_support/notifications/instrumenter.rb:25:in `instrument'
        6: from /Users/johnkchow/.rbenv/versions/2.5.1/lib/ruby/gems/2.5.0/gems/activesupport-4.2.11/lib/active_support/notifications/instrumenter.rb:36:in `finish'
        5: from /Users/johnkchow/.rbenv/versions/2.5.1/lib/ruby/gems/2.5.0/gems/activesupport-4.2.11/lib/active_support/notifications/fanout.rb:46:in `finish'
        4: from /Users/johnkchow/.rbenv/versions/2.5.1/lib/ruby/gems/2.5.0/gems/activesupport-4.2.11/lib/active_support/notifications/fanout.rb:46:in `each'
        3: from /Users/johnkchow/.rbenv/versions/2.5.1/lib/ruby/gems/2.5.0/gems/activesupport-4.2.11/lib/active_support/notifications/fanout.rb:46:in `block in finish'
        2: from /Users/johnkchow/.rbenv/versions/2.5.1/lib/ruby/gems/2.5.0/gems/activesupport-4.2.11/lib/active_support/notifications/fanout.rb:127:in `finish'
        1: from /private/var/folders/9q/0tnb0bwj5514jj4xl440f4j80000gn/T/sample.rb:14:in `block in <top (required)>'
RuntimeError (foo)

sample.rb

require 'active_support'

begin
  ActiveSupport::Notifications.subscribe('foo') do
    puts "1"
  end

  ActiveSupport::Notifications.subscribe('foo') do
    puts "2"
  end

  ActiveSupport::Notifications.subscribe('foo') do
    puts "into 3"
    raise "foo"
  end

  ActiveSupport::Notifications.subscribe('foo') do
    # this never gets outputted
    puts "4"
  end

  ActiveSupport::Notifications.instrument('foo', extra: :information) do
    # this never gets outputted
    puts "publish done"
  end
ensure
  ActiveSupport::Notifications.unsubscribe('foo')
end