Ruby 1.9.3 issue in ruby-debug

gistfile1.txt

# Ran against github.com/rubypair/rubypair

/Users/light/.rvm/gems/ruby-1.9.3-preview1@rubypair/gems/ruby-debug-base19-0.11.25/lib/ruby-debug-base.rb:1:in `require': dlopen(/Users/light/.rvm/gems/ruby-1.9.3-preview1@rubypair/gems/ruby-debug-base19-0.11.25/lib/ruby_debug.bundle, 9): Symbol not found: _ruby_current_thread (LoadError)
  Referenced from: /Users/light/.rvm/gems/ruby-1.9.3-preview1@rubypair/gems/ruby-debug-base19-0.11.25/lib/ruby_debug.bundle
  Expected in: flat namespace
 in /Users/light/.rvm/gems/ruby-1.9.3-preview1@rubypair/gems/ruby-debug-base19-0.11.25/lib/ruby_debug.bundle - /Users/light/.rvm/gems/ruby-1.9.3-preview1@rubypair/gems/ruby-debug-base19-0.11.25/lib/ruby_debug.bundle
	from /Users/light/.rvm/gems/ruby-1.9.3-preview1@rubypair/gems/ruby-debug-base19-0.11.25/lib/ruby-debug-base.rb:1:in `<top (required)>'
	from /Users/light/.rvm/gems/ruby-1.9.3-preview1@rubypair/gems/ruby-debug19-0.11.6/cli/ruby-debug.rb:5:in `require'
	from /Users/light/.rvm/gems/ruby-1.9.3-preview1@rubypair/gems/ruby-debug19-0.11.6/cli/ruby-debug.rb:5:in `<top (required)>'
	from /Users/light/.rvm/gems/ruby-1.9.3-preview1@global/gems/bundler-1.0.20/lib/bundler/runtime.rb:68:in `require'
	from /Users/light/.rvm/gems/ruby-1.9.3-preview1@global/gems/bundler-1.0.20/lib/bundler/runtime.rb:68:in `block (2 levels) in require'
	from /Users/light/.rvm/gems/ruby-1.9.3-preview1@global/gems/bundler-1.0.20/lib/bundler/runtime.rb:66:in `each'
	from /Users/light/.rvm/gems/ruby-1.9.3-preview1@global/gems/bundler-1.0.20/lib/bundler/runtime.rb:66:in `block in require'
	from /Users/light/.rvm/gems/ruby-1.9.3-preview1@global/gems/bundler-1.0.20/lib/bundler/runtime.rb:55:in `each'
	from /Users/light/.rvm/gems/ruby-1.9.3-preview1@global/gems/bundler-1.0.20/lib/bundler/runtime.rb:55:in `require'
	from /Users/light/.rvm/gems/ruby-1.9.3-preview1@global/gems/bundler-1.0.20/lib/bundler.rb:123:in `require'
	from /Users/light/work/oss/rubypair/config/application.rb:11:in `<top (required)>'
	from /Users/light/work/oss/rubypair/config/environment.rb:2:in `require'
	from /Users/light/work/oss/rubypair/config/environment.rb:2:in `<top (required)>'
	from /Users/light/work/oss/rubypair/spec/spec_helper.rb:2:in `require'
	from /Users/light/work/oss/rubypair/spec/spec_helper.rb:2:in `<top (required)>'
	from /Users/light/.rvm/gems/ruby-1.9.3-preview1@rubypair/gems/rspec-core-2.6.4/lib/rspec/core/configuration.rb:247:in `require'
	from /Users/light/.rvm/gems/ruby-1.9.3-preview1@rubypair/gems/rspec-core-2.6.4/lib/rspec/core/configuration.rb:247:in `block in requires='
	from /Users/light/.rvm/gems/ruby-1.9.3-preview1@rubypair/gems/rspec-core-2.6.4/lib/rspec/core/configuration.rb:247:in `map'
	from /Users/light/.rvm/gems/ruby-1.9.3-preview1@rubypair/gems/rspec-core-2.6.4/lib/rspec/core/configuration.rb:247:in `requires='
	from /Users/light/.rvm/gems/ruby-1.9.3-preview1@rubypair/gems/rspec-core-2.6.4/lib/rspec/core/configuration_options.rb:21:in `block in configure'
	from /Users/light/.rvm/gems/ruby-1.9.3-preview1@rubypair/gems/rspec-core-2.6.4/lib/rspec/core/configuration_options.rb:20:in `each'
	from /Users/light/.rvm/gems/ruby-1.9.3-preview1@rubypair/gems/rspec-core-2.6.4/lib/rspec/core/configuration_options.rb:20:in `configure'
	from /Users/light/.rvm/gems/ruby-1.9.3-preview1@rubypair/gems/rspec-core-2.6.4/lib/rspec/core/command_line.rb:17:in `run'
	from /Users/light/.rvm/gems/ruby-1.9.3-preview1@rubypair/gems/rspec-core-2.6.4/lib/rspec/core/runner.rb:80:in `run_in_process'
	from /Users/light/.rvm/gems/ruby-1.9.3-preview1@rubypair/gems/rspec-core-2.6.4/lib/rspec/core/runner.rb:69:in `run'
	from /Users/light/.rvm/gems/ruby-1.9.3-preview1@rubypair/gems/rspec-core-2.6.4/lib/rspec/core/runner.rb:11:in `block in autorun'
rake aborted!
ruby -S bundle exec rspec -r spec_helper ./spec/domain_models/user_model_spec.rb ./spec/models/user/new_user_provisioner_spec.rb ./spec/models/user_spec.rb ./spec/presenters/user_presenter_spec.rb ./spec/requests/home_request_spec.rb ./spec/requests/sessions_request_spec.rb ./spec/requests/users_request_spec.rb failed

Tasks: TOP => default => spec
(See full trace by running task with --trace)

For now I got my rails project working by commenting out #gem 'ruby-debug19', :require => 'ruby-debug' .

Thanks for the links , I will check those out if that works for me.