class with action definition

class SoapServiceController < ApplicationController
  include WashOut::SOAP
  
  soap_action "print_params", :args => {
    :circle => {
      :center => {
        :x => :integer,
        :y => :integer
      },
      :radius => :double
    }}, :return => :string
  
  def print_params
    render :soap => params.inspect
  end
end

soapUI request

<soapenv:Envelope xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/" xmlns:urn="urn:WashOut">
   <soapenv:Header/>
   <soapenv:Body>
      <urn:print_params soapenv:encodingStyle="http://schemas.xmlsoap.org/soap/encoding/">
         <circle xsi:type="urn:circle">
            <center xsi:type="urn:center">
               <x xsi:type="xsd:int">1</x>
               <y xsi:type="xsd:int">2</y>
            </center>
            <radius xsi:type="xsd:double">3</radius>
         </circle>
      </urn:print_params>
   </soapenv:Body>
</soapenv:Envelope>

wash_out stack trace

RuntimeError (can't add a new key into hash during iteration):
  org/jruby/RubyHash.java:899:in `[]='
  wash_out (0.5.4) lib/wash_out/dispatcher.rb:75:in `_map_soap_parameters'
  org/jruby/RubyHash.java:1181:in `each'
  wash_out (0.5.4) lib/wash_out/dispatcher.rb:70:in `_map_soap_parameters'
  org/jruby/RubyProc.java:270:in `call'
  org/jruby/RubyProc.java:220:in `call'
  wash_out (0.5.4) lib/wash_out/dispatcher.rb:84:in `_map_soap_parameters'
  activesupport (3.2.8) lib/active_support/callbacks.rb:443:in `_run__967186073__process_action__5552502__callbacks'
  org/jruby/RubyKernel.java:2076:in `send'
  activesupport (3.2.8) lib/active_support/callbacks.rb:405:in `__run_callback'
  activesupport (3.2.8) lib/active_support/callbacks.rb:390:in `_run_process_action_callbacks'
  org/jruby/RubyKernel.java:2080:in `send'
  activesupport (3.2.8) lib/active_support/callbacks.rb:81:in `run_callbacks'
  actionpack (3.2.8) lib/abstract_controller/callbacks.rb:17:in `process_action'
  actionpack (3.2.8) lib/action_controller/metal/rescue.rb:29:in `process_action'
  actionpack (3.2.8) lib/action_controller/metal/instrumentation.rb:30:in `process_action'
  activesupport (3.2.8) lib/active_support/notifications.rb:123:in `instrument'
  activesupport (3.2.8) lib/active_support/notifications/instrumenter.rb:20:in `instrument'
  activesupport (3.2.8) lib/active_support/notifications/instrumenter.rb:19:in `instrument'
  activesupport (3.2.8) lib/active_support/notifications.rb:123:in `instrument'
  actionpack (3.2.8) lib/action_controller/metal/instrumentation.rb:29:in `process_action'
  actionpack (3.2.8) lib/action_controller/metal/params_wrapper.rb:207:in `process_action'
  activerecord (3.2.8) lib/active_record/railties/controller_runtime.rb:18:in `process_action'
  actionpack (3.2.8) lib/abstract_controller/base.rb:121:in `process'
  actionpack (3.2.8) lib/abstract_controller/rendering.rb:45:in `process'
  actionpack (3.2.8) lib/action_controller/metal.rb:203:in `dispatch'
  actionpack (3.2.8) lib/action_controller/metal/rack_delegation.rb:14:in `dispatch'
  actionpack (3.2.8) lib/action_controller/metal.rb:246:in `action'
  org/jruby/RubyProc.java:270:in `call'
  org/jruby/RubyProc.java:220:in `call'
  wash_out (0.5.4) lib/wash_out/router.rb:29:in `call'
  journey (1.0.4) lib/journey/router.rb:68:in `call'
  org/jruby/RubyArray.java:1615:in `each'
  journey (1.0.4) lib/journey/router.rb:56:in `call'
  actionpack (3.2.8) lib/action_dispatch/routing/route_set.rb:600:in `call'
  warden (1.2.1) lib/warden/manager.rb:35:in `call'
  org/jruby/RubyKernel.java:1183:in `catch'
  warden (1.2.1) lib/warden/manager.rb:34:in `call'
  actionpack (3.2.8) lib/action_dispatch/middleware/best_standards_support.rb:17:in `call'
  rack (1.4.1) lib/rack/etag.rb:23:in `call'
  rack (1.4.1) lib/rack/conditionalget.rb:35:in `call'
  actionpack (3.2.8) lib/action_dispatch/middleware/head.rb:14:in `call'
  actionpack (3.2.8) lib/action_dispatch/middleware/params_parser.rb:21:in `call'
  actionpack (3.2.8) lib/action_dispatch/middleware/flash.rb:242:in `call'
  rack (1.4.1) lib/rack/session/abstract/id.rb:205:in `context'
  rack (1.4.1) lib/rack/session/abstract/id.rb:200:in `call'
  actionpack (3.2.8) lib/action_dispatch/middleware/cookies.rb:339:in `call'
  activerecord (3.2.8) lib/active_record/query_cache.rb:64:in `call'
  activerecord (3.2.8) lib/active_record/connection_adapters/abstract/connection_pool.rb:473:in `call'
  actionpack (3.2.8) lib/action_dispatch/middleware/callbacks.rb:28:in `call'
  activesupport (3.2.8) lib/active_support/callbacks.rb:408:in `_run__401172004__call__2134210400__callbacks'
  org/jruby/RubyKernel.java:2076:in `send'
  activesupport (3.2.8) lib/active_support/callbacks.rb:405:in `__run_callback'
  activesupport (3.2.8) lib/active_support/callbacks.rb:390:in `_run_call_callbacks'
  org/jruby/RubyKernel.java:2076:in `send'
  activesupport (3.2.8) lib/active_support/callbacks.rb:81:in `run_callbacks'
  actionpack (3.2.8) lib/action_dispatch/middleware/callbacks.rb:27:in `call'
  actionpack (3.2.8) lib/action_dispatch/middleware/reloader.rb:65:in `call'
  actionpack (3.2.8) lib/action_dispatch/middleware/remote_ip.rb:31:in `call'
  actionpack (3.2.8) lib/action_dispatch/middleware/debug_exceptions.rb:16:in `call'
  actionpack (3.2.8) lib/action_dispatch/middleware/show_exceptions.rb:56:in `call'
  railties (3.2.8) lib/rails/rack/logger.rb:26:in `call_app'
  railties (3.2.8) lib/rails/rack/logger.rb:16:in `call'
  actionpack (3.2.8) lib/action_dispatch/middleware/request_id.rb:22:in `call'
  rack (1.4.1) lib/rack/methodoverride.rb:21:in `call'
  rack (1.4.1) lib/rack/runtime.rb:17:in `call'
  activesupport (3.2.8) lib/active_support/cache/strategy/local_cache.rb:72:in `call'
  rack (1.4.1) lib/rack/lock.rb:15:in `call'
  actionpack (3.2.8) lib/action_dispatch/middleware/static.rb:62:in `call'
  railties (3.2.8) lib/rails/engine.rb:479:in `call'
  railties (3.2.8) lib/rails/application.rb:223:in `call'
  rack (1.4.1) lib/rack/content_length.rb:14:in `call'
  railties (3.2.8) lib/rails/rack/log_tailer.rb:17:in `call'
  rack (1.4.1) lib/rack/handler/webrick.rb:59:in `service'
  /opt/jruby/lib/ruby/1.8/webrick/httpserver.rb:104:in `service'
  /opt/jruby/lib/ruby/1.8/webrick/httpserver.rb:65:in `run'
  /opt/jruby/lib/ruby/1.8/webrick/server.rb:173:in `start_thread'
  org/jruby/RubyProc.java:270:in `call'
  org/jruby/RubyProc.java:224:in `call'