error when running 'rake' on jruby 1.5.3

error_message

C:\cygwin\home\patrik\dev\ore>rake --trace
(in C:/cygwin/home/patrik/dev/ore)
** Invoke default (first_time)
** Invoke spec (first_time)
** Execute spec
c:/jruby-1.5.3/bin/jruby.exe -S rspec "./spec/dependency_spec.rb" "./spec/document_file_spec.rb" "./spec/naming_spec.rb" "./spec/projects/dm_plugin_project_spec.rb" "./spec/projects/explicit_project_spec.rb" "./spec/projects/ffi_binding_project_spec.rb" "./spec/projects/jeweler_project_spec.rb" "./spec/projects/minimal_project_spec.rb" "./spec/versions/version_file_spec.rb" "./spec/versions/version_spec.rb"
rake aborted!
ruby -S rspec "./spec/dependency_spec.rb" "./spec/document_file_spec.rb" "./spec/naming_spec.rb" "./spec/projects/dm_plugin_project_spec.rb" "./spec/projects/explicit_project_spec.rb" "./spec/projects/ffi_binding_project_spec.rb" "./spec/projects/jeweler_project_spec.rb" "./spec/projects/minimal_project_spec.rb" "./spec/versions/version_file_spec.rb" "./spec/versions/version_spec.rb" failed
c:/jruby-1.5.3/lib/ruby/gems/1.8/gems/rspec-core-2.0.1/lib/rspec/core/rake_task.rb:117:in `initialize'
c:/jruby-1.5.3/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:1112:in `verbose'
c:/jruby-1.5.3/lib/ruby/gems/1.8/gems/rspec-core-2.0.1/lib/rspec/core/rake_task.rb:109:in `initialize'
c:/jruby-1.5.3/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:636:in `call'
c:/jruby-1.5.3/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:636:in `execute'
c:/jruby-1.5.3/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:631:in `each'
c:/jruby-1.5.3/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:631:in `execute'
c:/jruby-1.5.3/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:597:in `invoke_with_call_chain'
c:/jruby-1.5.3/lib/ruby/1.8/monitor.rb:191:in `mon_synchronize'
c:/jruby-1.5.3/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:590:in `invoke_with_call_chain'
c:/jruby-1.5.3/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:607:in `invoke_prerequisites'
c:/jruby-1.5.3/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:604:in `each'
c:/jruby-1.5.3/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:604:in `invoke_prerequisites'
c:/jruby-1.5.3/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:596:in `invoke_with_call_chain'
c:/jruby-1.5.3/lib/ruby/1.8/monitor.rb:191:in `mon_synchronize'
c:/jruby-1.5.3/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:590:in `invoke_with_call_chain'
c:/jruby-1.5.3/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:583:in `invoke'
c:/jruby-1.5.3/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:2051:in `invoke_task'
c:/jruby-1.5.3/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:2029:in `top_level'
c:/jruby-1.5.3/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:2029:in `each'
c:/jruby-1.5.3/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:2029:in `top_level'
c:/jruby-1.5.3/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:2068:in `standard_exception_handling'
c:/jruby-1.5.3/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:2023:in `top_level'
c:/jruby-1.5.3/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:2001:in `run'
c:/jruby-1.5.3/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:2068:in `standard_exception_handling'
c:/jruby-1.5.3/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:1998:in `run'
C:/jruby-1.5.3/lib/ruby/gems/1.8/gems/rake-0.8.7/bin/rake:31
C:/jruby-1.5.3/lib/ruby/gems/1.8/gems/rake-0.8.7/bin/rake:19:in `load'
c:\jruby-1.5.3\bin\rake:19