Error message
LocalJumpError: unexpected return

Stack trace (hide Rails)
…d/bundle/ruby/2.0.0/gems/moped-1.5.0/lib/moped/node.rb:  97:in `block in command'
…d/bundle/ruby/2.0.0/gems/moped-1.5.0/lib/moped/node.rb: 587:in `[]'
…d/bundle/ruby/2.0.0/gems/moped-1.5.0/lib/moped//shoto/shared/bundle/ruby/2.0.0/gems/moped-1.5.0/lib/moped/node.rbnode.rb: 587:in `block (3 levels) in flush'
…d/bundle/ruby/2.0.0/gems/moped-1.5.0/lib/moped/node.rb: 586:in `map'
…d/bundle/ruby/2.0.0/gems/moped-1.5.0/lib/moped/node.rb: 586:in `block (2 levels) in flush'
…d/bundle/ruby/2.0.0/gems/moped-1.5.0/lib/moped/node.rb: 150:in `ensure_connected'
…d/bundle/ruby/2.0.0/gems/moped-1.5.0/lib/moped/node.rb: 582:in `block in flush'
…d/bundle/ruby/2.0.0/gems/moped-1.5.0/lib/moped/node.rb: 597:in `logging'
…elic_moped-0.0.6/lib/newrelic_moped/instrumentation.rb:  38:in `block in logging_with_newrelic_trace'
…elic_moped-0.0.6/lib/newrelic_moped/instrumentation.rb:  47:in `call'
…elic_moped-0.0.6/lib/newrelic_moped/instrumentation.rb:  47:in `block in logging_with_newrelic_trace'
…elic_moped-0.0.6/lib/newrelic_moped/instrumentation.rb:  44:in `logging_with_newrelic_trace'
…d/bundle/ruby/2.0.0/gems/moped-1.5.0/lib/moped/node.rb: 581:in `flush'
…d/bundle/ruby/2.0.0/gems/moped-1.5.0/lib/moped/node.rb: 313:in `pipeline'
…by/2.0.0/gems/moped-1.5.0/lib/moped/session/context.rb:  58:in `block in insert'
…by/2.0.0/gems/moped-1.5.0/lib/moped/session/context.rb: 109:in `block in with_node'
…undle/ruby/2.0.0/gems/moped-1.5.0/lib/moped/cluster.rb: 209:in `block in with_primary'
…d/bundle/ruby/2.0.0/gems/moped-1.5.0/lib/moped/node.rb: 195:in `ensure_primary'
…undle/ruby/2.0.0/gems/moped-1.5.0/lib/moped/cluster.rb: 208:in `with_primary'
…by/2.0.0/gems/moped-1.5.0/lib/moped/session/context.rb: 108:in `with_node'
…by/2.0.0/gems/moped-1.5.0/lib/moped/session/context.rb:  56:in `insert'
…le/ruby/2.0.0/gems/moped-1.5.0/lib/moped/collection.rb: 106:in `block in insert'

---
staging: 
  sessions: 
    default: 
      database: staging
      hosts: 
      - w-mongos.objectrocket.com:xxxx/database-name
      options: 
        safe: false
        consistency: :eventual
        max_retries: 30
        retry_interval: 1
      username: the_username
      password: the_password
  options: 
    identity_map_enabled: true
    include_root_in_json: false
    include_type_for_serialization: false
    preload_models: false
    raise_not_found_error: true
    scope_overwrite_exception: false
    use_activesupport_time_zone: true
    use_utc: false