can't dump anonymous class Class on bundle exec rake gitlab:app:setup

Created by: VonC

Starting commit 71bd9568, I always get this error when initializing a new GitLab mysql database with gitlab/github #bundle exec rake gitlab:app:setup RAILS_ENV=production

-- initialize_schema_migrations_table()
   -> 0.0013s
-- assume_migrated_upto_version(20130110172407, ["/home/auser/gitpoc/passenger/gitlab/github/db/migrate"])
   -> 0.0017s

== Seed from /home/auser/gitpoc/passenger/gitlab/github/db/fixtures/production/001_admin.rb
rake aborted!
can't dump anonymous class Class
/home/auser/gitpoc/passenger/gitlab/github/vendor/bundle/ruby/1.9.1/gems/seed-fu-2.2.0/lib/seed-fu/runner.rb:46:in `eval'
/home/auser/gitpoc/passenger/gitlab/github/vendor/bundle/ruby/1.9.1/gems/sidekiq-2.6.4/lib/sidekiq/extensions/generic_proxy.rb:17:in `method_missing'
/home/auser/gitpoc/passenger/gitlab/github/app/observers/user_observer.rb:5:in `after_create'
/home/auser/gitpoc/passenger/gitlab/github/vendor/bundle/ruby/1.9.1/gems/activemodel-3.2.11/lib/active_model/observing.rb:231:in `update'

...

/home/auser/gitpoc/passenger/gitlab/github/vendor/bundle/ruby/1.9.1/gems/seed-fu-2.2.0/lib/seed-fu/runner.rb:25:in `run'
/home/auser/gitpoc/passenger/gitlab/github/vendor/bundle/ruby/1.9.1/gems/seed-fu-2.2.0/lib/seed-fu.rb:29:in `seed'
/home/auser/gitpoc/passenger/gitlab/github/vendor/bundle/ruby/1.9.1/gems/seed-fu-2.2.0/lib/tasks/seed_fu.rake:36:in `block (2 levels) in <top (required)>'
Tasks: TOP => gitlab:app:setup => db:seed_fu
(See full trace by running task with --trace)

Up to commit 7bfd38ea, the initialization was working fine:

-- assume_migrated_upto_version(20130102143055, ["/home/auser/gitpoc/passenger/gitlab/github/db/migrate"])
   -> 0.0061s

== Seed from /home/auser/gitpoc/passenger/gitlab/github/db/fixtures/production/001_admin.rb

Administrator account created:

login.........admin@local.host
password......5iveL!fe

With:

/home/auser/gitpoc/passenger/gitlab/github #ruby --version  
ruby 1.9.2p320 (2012-04-20 revision 35421) [x86_64-linux]