RubyAMF使ってsaveしようとするとエラーになる問題（未解決）

Rails Flex

AMF使って受けたデータをほげほげしてsaveしようとしたらエラーが出る。

127.0.0.1 - - [22/May/2008:17:41:35 JST] "POST /rubyamf/gateway HTTP/1.1" 200 311
http://localhost:3000/bin/flex.swf -> /rubyamf/gateway
stack level too deep
{RAILS_ROOT}vendor/plugins/rubyamf/io/amf_serializer.rb:172:in `write_amf3_integer'
{RAILS_ROOT}vendor/plugins/rubyamf/io/amf_serializer.rb:208:in `write_amf3_string'
{RAILS_ROOT}vendor/plugins/rubyamf/io/amf_serializer.rb:230:in `write_amf3_object'
{RAILS_ROOT}vendor/plugins/rubyamf/io/amf_serializer.rb:225:in `each'
{RAILS_ROOT}vendor/plugins/rubyamf/io/amf_serializer.rb:225:in `write_amf3_object'
{RAILS_ROOT}vendor/plugins/rubyamf/io/amf_serializer.rb:167:in `write_amf3'
{RAILS_ROOT}vendor/plugins/rubyamf/io/amf_serializer.rb:231:in `write_amf3_object'
{RAILS_ROOT}vendor/plugins/rubyamf/io/amf_serializer.rb:225:in `each'

(以下6000行ぐらい同じエラーが続く)

{RAILS_ROOT}vendor/plugins/rubyamf/io/amf_serializer.rb:225:in `write_amf3_object'
{RAILS_ROOT}vendor/plugins/rubyamf/io/amf_serializer.rb:160:in `write_amf3'
{RAILS_ROOT}vendor/plugins/rubyamf/io/amf_serializer.rb:231:in `write_amf3_object'
{RAILS_ROOT}vendor/plugins/rubyamf/io/amf_serializer.rb:225:in `each'
{RAILS_ROOT}vendor/plugins/rubyamf/io/amf_serializer.rb:225:in `write_amf3_object'
{RAILS_ROOT}vendor/plugins/rubyamf/io/amf_serializer.rb:152:in `write_amf3'
{RAILS_ROOT}vendor/plugins/rubyamf/io/amf_serializer.rb:76:in `write'
{RAILS_ROOT}vendor/plugins/rubyamf/io/amf_serializer.rb:68:in `run'
{RAILS_ROOT}vendor/plugins/rubyamf/io/amf_serializer.rb:54:in `upto'
{RAILS_ROOT}vendor/plugins/rubyamf/io/amf_serializer.rb:54:in `run'
{RAILS_ROOT}vendor/plugins/rubyamf/app/filters.rb:66:in `run'
{RAILS_ROOT}vendor/plugins/rubyamf/app/filters.rb:11:in `run'
{RAILS_ROOT}vendor/plugins/rubyamf/app/filters.rb:10:in `each'
{RAILS_ROOT}vendor/plugins/rubyamf/app/filters.rb:10:in `run'
{RAILS_ROOT}vendor/plugins/rubyamf/app/rails_gateway.rb:28:in `service'
{RAILS_ROOT}app/controllers/rubyamf_controller.rb:16:in `gateway'
/opt/local/lib/ruby/gems/1.8/gems/actionpack-2.0.2/lib/action_controller/base.rb:1158:in `send'
/opt/local/lib/ruby/gems/1.8/gems/actionpack-2.0.2/lib/action_controller/base.rb:1158:in `perform_action_without_filters'
/opt/local/lib/ruby/gems/1.8/gems/actionpack-2.0.2/lib/action_controller/filters.rb:697:in `call_filters'
/opt/local/lib/ruby/gems/1.8/gems/actionpack-2.0.2/lib/action_controller/filters.rb:689:in `perform_action_without_benchmark'
/opt/local/lib/ruby/gems/1.8/gems/actionpack-2.0.2/lib/action_controller/benchmarking.rb:68:in `perform_action_without_rescue'
/opt/local/lib/ruby/1.8/benchmark.rb:293:in `measure'
/opt/local/lib/ruby/gems/1.8/gems/actionpack-2.0.2/lib/action_controller/benchmarking.rb:68:in `perform_action_without_rescue'
/opt/local/lib/ruby/gems/1.8/gems/actionpack-2.0.2/lib/action_controller/rescue.rb:199:in `perform_action_without_caching'
/opt/local/lib/ruby/gems/1.8/gems/actionpack-2.0.2/lib/action_controller/caching.rb:678:in `perform_action'
/opt/local/lib/ruby/gems/1.8/gems/activerecord-2.0.2/lib/active_record/connection_adapters/abstract/query_cache.rb:33:in `cache'
/opt/local/lib/ruby/gems/1.8/gems/activerecord-2.0.2/lib/active_record/query_cache.rb:8:in `cache'
/opt/local/lib/ruby/gems/1.8/gems/actionpack-2.0.2/lib/action_controller/caching.rb:677:in `perform_action'
/opt/local/lib/ruby/gems/1.8/gems/actionpack-2.0.2/lib/action_controller/base.rb:524:in `send'
/opt/local/lib/ruby/gems/1.8/gems/actionpack-2.0.2/lib/action_controller/base.rb:524:in `process_without_filters'
/opt/local/lib/ruby/gems/1.8/gems/actionpack-2.0.2/lib/action_controller/filters.rb:685:in `process_without_session_management_support'
/opt/local/lib/ruby/gems/1.8/gems/actionpack-2.0.2/lib/action_controller/session_management.rb:123:in `process'
/opt/local/lib/ruby/gems/1.8/gems/actionpack-2.0.2/lib/action_controller/base.rb:388:in `process'
/opt/local/lib/ruby/gems/1.8/gems/actionpack-2.0.2/lib/action_controller/dispatcher.rb:171:in `handle_request'
/opt/local/lib/ruby/gems/1.8/gems/actionpack-2.0.2/lib/action_controller/dispatcher.rb:115:in `dispatch'
/opt/local/lib/ruby/gems/1.8/gems/actionpack-2.0.2/lib/action_controller/dispatcher.rb:126:in `dispatch_cgi'
/opt/local/lib/ruby/gems/1.8/gems/actionpack-2.0.2/lib/action_controller/dispatcher.rb:9:in `dispatch'
/opt/local/lib/ruby/gems/1.8/gems/rails-2.0.2/lib/webrick_server.rb:112:in `handle_dispatch'
/opt/local/lib/ruby/gems/1.8/gems/rails-2.0.2/lib/webrick_server.rb:78:in `service'
/opt/local/lib/ruby/1.8/webrick/httpserver.rb:104:in `service'
/opt/local/lib/ruby/1.8/webrick/httpserver.rb:65:in `run'
/opt/local/lib/ruby/1.8/webrick/server.rb:173:in `start_thread'
/opt/local/lib/ruby/1.8/webrick/server.rb:162:in `start'
/opt/local/lib/ruby/1.8/webrick/server.rb:162:in `start_thread'
/opt/local/lib/ruby/1.8/webrick/server.rb:95:in `start'
/opt/local/lib/ruby/1.8/webrick/server.rb:92:in `each'
/opt/local/lib/ruby/1.8/webrick/server.rb:92:in `start'
/opt/local/lib/ruby/1.8/webrick/server.rb:23:in `start'
/opt/local/lib/ruby/1.8/webrick/server.rb:82:in `start'
/opt/local/lib/ruby/gems/1.8/gems/rails-2.0.2/lib/webrick_server.rb:62:in `dispatch'
/opt/local/lib/ruby/gems/1.8/gems/rails-2.0.2/lib/commands/servers/webrick.rb:66
/opt/local/lib/ruby/vendor_ruby/1.8/rubygems/custom_require.rb:27:in `gem_original_require'
/opt/local/lib/ruby/vendor_ruby/1.8/rubygems/custom_require.rb:27:in `require'
/opt/local/lib/ruby/gems/1.8/gems/activesupport-2.0.2/lib/active_support/dependencies.rb:496:in `require'
/opt/local/lib/ruby/gems/1.8/gems/activesupport-2.0.2/lib/active_support/dependencies.rb:342:in `new_constants_in'
/opt/local/lib/ruby/gems/1.8/gems/activesupport-2.0.2/lib/active_support/dependencies.rb:496:in `require'
/opt/local/lib/ruby/gems/1.8/gems/rails-2.0.2/lib/commands/server.rb:39
/opt/local/lib/ruby/vendor_ruby/1.8/rubygems/custom_require.rb:27:in `gem_original_require'
/opt/local/lib/ruby/vendor_ruby/1.8/rubygems/custom_require.rb:27:in `require'
script/server:3

同種のエラーがないか調べているんだけど、gettext絡みでRailsがエラーになることもあるらしい。そもそもgettext入れていないしMacPortsにはlibgettextがないので関係がない。そもそもエラー出てんのRubyAMFプラグインの部分でだしね。
RubyAMFで"stack level too deep"が出ているものを探してみるとGoogle グループというものを見つけたけど、エラー箇所が違うのでよく分からない。というかRubyAMFの情報が少なすぎて何がなんだか分からない。
仕方がないのでエラーで出ている行のソースを見てみた。AMF3に書く際に渡しているハッシュがVoHashか否かを見ているらしいけど、VoHashってなんだ？VoなHash?Voと言うとValueObjectのことだろうか。しかしValueObjectは名前だけ知っているけど何なのかは知らない。

とりあえずよく分からないのでまだ調べている最中。

ちなみに

respond_to do |format|
  if @hoge.save
    format.amf  { render :amf => @hoge }
  else
    format.amf  { render :amf => @hoge.error }
  end
end

respond_to do |format|
  unless @hoge.nil?
    format.amf  { render :amf => @hoge }
    @hoge.save
  else
    format.amf  { render :amf => @hoge.error }
  end
end

@hoge.save
respond_to do |format|
  unless @hoge.nil?
    format.amf  { render :amf => @hoge }
  else
    format.amf  { render :amf => @hoge.error }
  end
end

こう書くとエラーなんだけど

respond_to do |format|
  unless @hoge.nil?
    format.amf  { render :amf => @hoge }
  else
    format.amf  { render :amf => @hoge.error }
  end
end

こう書いたり

respond_to do |format|
  if @hoge.save
    format.xml  { render :xml => @hoge }
  else
    format.xml  { render :xml => @hoge.error }
  end
end

こう書いたりするとエラーにはならない。のでamfで返す場合でsaveを使うとエラーになるっぽい。そしてsaveの位置は特に関係がない、と。