* 2013-07-11 04:07:55 executing `puma:restart'
/Users/kain/.rvm/gems/ruby-2.0.0-p247@my/bundler/gems/puma-dc7cb724acbb/lib/puma/configuration.rb:282:in `on_worker_boot': undefined method `<<' for nil:NilClass (NoMethodError)
  from ./config/puma/staging.rb:124:in `_load_from'
  from /Users/kain/.rvm/gems/ruby-2.0.0-p247@my/bundler/gems/puma-dc7cb724acbb/lib/puma/configuration.rb:152:in `instance_eval'
  from /Users/kain/.rvm/gems/ruby-2.0.0-p247@my/bundler/gems/puma-dc7cb724acbb/lib/puma/configuration.rb:152:in `_load_from'
  from /Users/kain/.rvm/gems/ruby-2.0.0-p247@my/bundler/gems/puma-dc7cb724acbb/lib/puma/configuration.rb:32:in `load'
  from /Users/kain/.rvm/gems/ruby-2.0.0-p247@my/bundler/gems/puma-dc7cb724acbb/lib/puma/capistrano.rb:62:in `configuration'
  from /Users/kain/.rvm/gems/ruby-2.0.0-p247@my/bundler/gems/puma-dc7cb724acbb/lib/puma/capistrano.rb:55:in `state_path'
  from /Users/kain/.rvm/gems/ruby-2.0.0-p247@my/gems/capistrano-2.15.5/lib/capistrano/configuration/namespaces.rb:191:in `method_missing'
  from /Users/kain/.rvm/gems/ruby-2.0.0-p247@my/bundler/gems/puma-dc7cb724acbb/lib/puma/capistrano.rb:30:in `block (3 levels) in <top (required)>'
  from /Users/kain/.rvm/gems/ruby-2.0.0-p247@my/gems/capistrano-2.15.5/lib/capistrano/configuration/execution.rb:138:in `instance_eval'
  from /Users/kain/.rvm/gems/ruby-2.0.0-p247@my/gems/capistrano-2.15.5/lib/capistrano/configuration/execution.rb:138:in `invoke_task_directly'
  from /Users/kain/.rvm/gems/ruby-2.0.0-p247@my/gems/capistrano-2.15.5/lib/capistrano/configuration/callbacks.rb:25:in `invoke_task_directly_with_callbacks'
  from /Users/kain/.rvm/gems/ruby-2.0.0-p247@my/gems/capistrano-2.15.5/lib/capistrano/configuration/execution.rb:89:in `execute_task'
  from /Users/kain/.rvm/gems/ruby-2.0.0-p247@my/gems/capistrano-2.15.5/lib/capistrano/configuration/execution.rb:101:in `find_and_execute_task'
  from /Users/kain/.rvm/gems/ruby-2.0.0-p247@my/gems/capistrano-2.15.5/lib/capistrano/callback.rb:38:in `call'
  from /Users/kain/.rvm/gems/ruby-2.0.0-p247@my/gems/capistrano-2.15.5/lib/capistrano/configuration/callbacks.rb:141:in `block in trigger'
  from /Users/kain/.rvm/gems/ruby-2.0.0-p247@my/gems/capistrano-2.15.5/lib/capistrano/configuration/callbacks.rb:141:in `each'
  from /Users/kain/.rvm/gems/ruby-2.0.0-p247@my/gems/capistrano-2.15.5/lib/capistrano/configuration/callbacks.rb:141:in `trigger'
  from /Users/kain/.rvm/gems/ruby-2.0.0-p247@my/gems/capistrano-2.15.5/lib/capistrano/configuration/callbacks.rb:27:in `invoke_task_directly_with_callbacks'
  from /Users/kain/.rvm/gems/ruby-2.0.0-p247@my/gems/capistrano-2.15.5/lib/capistrano/configuration/execution.rb:89:in `execute_task'
  from /Users/kain/.rvm/gems/ruby-2.0.0-p247@my/gems/capistrano-2.15.5/lib/capistrano/configuration/namespaces.rb:191:in `method_missing'
  from /Users/kain/.rvm/gems/ruby-2.0.0-p247@my/gems/capistrano-2.15.5/lib/capistrano/configuration/namespaces.rb:110:in `block in define_task'
  from /Users/kain/.rvm/gems/ruby-2.0.0-p247@my/gems/capistrano-2.15.5/lib/capistrano/recipes/deploy.rb:202:in `block (2 levels) in load'
  from /Users/kain/.rvm/gems/ruby-2.0.0-p247@my/gems/capistrano-2.15.5/lib/capistrano/configuration/execution.rb:138:in `instance_eval'
  from /Users/kain/.rvm/gems/ruby-2.0.0-p247@my/gems/capistrano-2.15.5/lib/capistrano/configuration/execution.rb:138:in `invoke_task_directly'
  from /Users/kain/.rvm/gems/ruby-2.0.0-p247@my/gems/capistrano-2.15.5/lib/capistrano/configuration/callbacks.rb:25:in `invoke_task_directly_with_callbacks'
  from /Users/kain/.rvm/gems/ruby-2.0.0-p247@my/gems/capistrano-2.15.5/lib/capistrano/configuration/execution.rb:89:in `execute_task'
  from /Users/kain/.rvm/gems/ruby-2.0.0-p247@my/gems/capistrano-2.15.5/lib/capistrano/configuration/execution.rb:101:in `find_and_execute_task'
  from /Users/kain/.rvm/gems/ruby-2.0.0-p247@my/gems/capistrano-2.15.5/lib/capistrano/cli/execute.rb:46:in `block in execute_requested_actions'
  from /Users/kain/.rvm/gems/ruby-2.0.0-p247@my/gems/capistrano-2.15.5/lib/capistrano/cli/execute.rb:45:in `each'
  from /Users/kain/.rvm/gems/ruby-2.0.0-p247@my/gems/capistrano-2.15.5/lib/capistrano/cli/execute.rb:45:in `execute_requested_actions'
  from /Users/kain/.rvm/gems/ruby-2.0.0-p247@my/gems/capistrano-2.15.5/lib/capistrano/cli/help.rb:19:in `execute_requested_actions_with_help'
  from /Users/kain/.rvm/gems/ruby-2.0.0-p247@my/gems/capistrano-2.15.5/lib/capistrano/cli/execute.rb:34:in `execute!'
  from /Users/kain/.rvm/gems/ruby-2.0.0-p247@my/gems/capistrano-2.15.5/lib/capistrano/cli/execute.rb:14:in `execute'
  from /Users/kain/.rvm/gems/ruby-2.0.0-p247@my/gems/capistrano-2.15.5/bin/cap:4:in `<top (required)>'
  from /Users/kain/.rvm/gems/ruby-2.0.0-p247@my/bin/cap:23:in `load'
  from /Users/kain/.rvm/gems/ruby-2.0.0-p247@my/bin/cap:23:in `<main>'
  from /Users/kain/.rvm/gems/ruby-2.0.0-p247@my/bin/ruby_noexec_wrapper:14:in `eval'
  from /Users/kain/.rvm/gems/ruby-2.0.0-p247@my/bin/ruby_noexec_wrapper:14:in `<main>'