JRuby on Rails で エラー

でgenerateを実行すると"relative_path_from"エラーが出る。

c:\rbc\jruby_test>jruby -S script/generate controller hello index
C:/_work/languages/JRuby/jruby-1.2.0/lib/ruby/gems/1.8/gems/actionpack-2.3.2/lib/action_controller/middleware_stack.rb:84 warning: given block not used
C:/_work/languages/JRuby/jruby-1.2.0/bin/../lib/ruby/1.8/pathname.rb:712:in `relative_path_from': different prefix: "c:/" and "c:\\rbc/jruby_test" (ArgumentErro
r)
from C:/_work/languages/JRuby/jruby-1.2.0/lib/ruby/gems/1.8/gems/rails-2.3.2/lib/rails_generator/lookup.rb:110:in `use_component_sources!'
from C:/_work/languages/JRuby/jruby-1.2.0/lib/ruby/gems/1.8/gems/rails-2.3.2/lib/rails_generator/lookup.rb:109:in `each'
from C:/_work/languages/JRuby/jruby-1.2.0/lib/ruby/gems/1.8/gems/rails-2.3.2/lib/rails_generator/lookup.rb:109:in `use_component_sources!'
from C:/_work/languages/JRuby/jruby-1.2.0/lib/ruby/gems/1.8/gems/rails-2.3.2/lib/rails_generator/lookup.rb:55:in `included'
from C:/_work/languages/JRuby/jruby-1.2.0/lib/ruby/gems/1.8/gems/rails-2.3.2/lib/rails_generator.rb:38
from C:/_work/languages/JRuby/jruby-1.2.0/lib/ruby/gems/1.8/gems/rails-2.3.2/lib/rails_generator.rb:31:in `require'
from C:/_work/languages/JRuby/jruby-1.2.0/bin/../lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:31:in `require'
from C:/_work/languages/JRuby/jruby-1.2.0/lib/ruby/gems/1.8/gems/activesupport-2.3.2/lib/active_support/dependencies.rb:156:in `require'
from C:/_work/languages/JRuby/jruby-1.2.0/lib/ruby/gems/1.8/gems/activesupport-2.3.2/lib/active_support/dependencies.rb:521:in `new_constants_in'
from C:/_work/languages/JRuby/jruby-1.2.0/lib/ruby/gems/1.8/gems/activesupport-2.3.2/lib/active_support/dependencies.rb:156:in `require'
from C:/_work/languages/JRuby/jruby-1.2.0/lib/ruby/gems/1.8/gems/rails-2.3.2/lib/commands/generate.rb:2
from C:/_work/languages/JRuby/jruby-1.2.0/lib/ruby/gems/1.8/gems/rails-2.3.2/lib/commands/generate.rb:31:in `require'
from C:/_work/languages/JRuby/jruby-1.2.0/bin/../lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:31:in `require'
from c:\rbc\jruby_test\script\generate:3


もしかして「"c:/"と"c:\\"が違うから実行できませんよー」って怒られてるのか?
なんてこったい。
(英語できないので解釈が正しいかは不明)


もういい、寝る。