Problem running rspec in fizzbuzz challenge

[kitkat119]

I have followed the instructions for setting up the fizzbuzz challenge but when I try to run rspec, I get the following message. Any ideas what is going on and how I can make it work? Thanks!

dowkr14:~/workspace/Projects/fizzbuzz (master) $ rspec fizzbuzz_spec.rb /usr/local/rvm/rubies/ruby-2.3.0/lib/ruby/2.3.0/rubygems/specification.rb:2158:in method_missing': undefined methodthis' for # (NoMethodError) from /usr/local/rvm/rubies/ruby-2.3.0/lib/ruby/2.3.0/rubygems/specification.rb:1057:in find_active_stub_by_path' from /usr/local/rvm/rubies/ruby-2.3.0/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:64:inrequire' from /usr/local/rvm/gems/ruby-2.3.0/gems/rspec-expectations-3.6.0/lib/rspec/expectations.rb:1:in <top (required)>' from /usr/local/rvm/rubies/ruby-2.3.0/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:127:inrequire' from /usr/local/rvm/rubies/ruby-2.3.0/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:127:in rescue in require' from /usr/local/rvm/rubies/ruby-2.3.0/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:40:inrequire' from /usr/local/rvm/gems/ruby-2.3.0/gems/rspec-core-3.6.0/lib/rspec/core/configuration.rb:743:in block in expect_with' from /usr/local/rvm/gems/ruby-2.3.0/gems/rspec-core-3.6.0/lib/rspec/core/configuration.rb:738:inmap' from /usr/local/rvm/gems/ruby-2.3.0/gems/rspec-core-3.6.0/lib/rspec/core/configuration.rb:738:in expect_with' from /home/ubuntu/workspace/Projects/fizzbuzz/spec/spec_helper.rb:20:inblock in <top (required)>' from /usr/local/rvm/gems/ruby-2.3.0/gems/rspec-core-3.6.0/lib/rspec/core.rb:98:in configure' from /home/ubuntu/workspace/Projects/fizzbuzz/spec/spec_helper.rb:16:in<top (required)>' from /usr/local/rvm/rubies/ruby-2.3.0/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:55:in require' from /usr/local/rvm/rubies/ruby-2.3.0/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:55:inrequire' from /usr/local/rvm/gems/ruby-2.3.0/gems/rspec-core-3.6.0/lib/rspec/core/configuration.rb:1453:in block in requires=' from /usr/local/rvm/gems/ruby-2.3.0/gems/rspec-core-3.6.0/lib/rspec/core/configuration.rb:1453:ineach' from /usr/local/rvm/gems/ruby-2.3.0/gems/rspec-core-3.6.0/lib/rspec/core/configuration.rb:1453:in requires=' from /usr/local/rvm/gems/ruby-2.3.0/gems/rspec-core-3.6.0/lib/rspec/core/configuration_options.rb:112:inblock in process_options_into' from /usr/local/rvm/gems/ruby-2.3.0/gems/rspec-core-3.6.0/lib/rspec/core/configuration_options.rb:111:in each' from /usr/local/rvm/gems/ruby-2.3.0/gems/rspec-core-3.6.0/lib/rspec/core/configuration_options.rb:111:inprocess_options_into' from /usr/local/rvm/gems/ruby-2.3.0/gems/rspec-core-3.6.0/lib/rspec/core/configuration_options.rb:21:in configure' from /usr/local/rvm/gems/ruby-2.3.0/gems/rspec-core-3.6.0/lib/rspec/core/runner.rb:99:insetup' from /usr/local/rvm/gems/ruby-2.3.0/gems/rspec-core-3.6.0/lib/rspec/core/runner.rb:86:in run' from /usr/local/rvm/gems/ruby-2.3.0/gems/rspec-core-3.6.0/lib/rspec/core/runner.rb:71:inrun' from /usr/local/rvm/gems/ruby-2.3.0/gems/rspec-core-3.6.0/lib/rspec/core/runner.rb:45:in invoke' from /usr/local/rvm/gems/ruby-2.3.0/gems/rspec-core-3.6.0/exe/rspec:4:in<top (required)>' from /usr/local/rvm/gems/ruby-2.3.0/bin/rspec:23:in load' from /usr/local/rvm/gems/ruby-2.3.0/bin/rspec:23:in

' from /usr/local/rvm/gems/ruby-2.3.0/bin/ruby_executable_hooks:15:in eval' from /usr/local/rvm/gems/ruby-2.3.0/bin/ruby_executable_hooks:15:in

'

[ghost]

@kitkat119 try this but please read the discussion from the link below before to make sure its same as your situation. it seems so, but just in case

https://github.com/rubygems/rubygems/issues/1420#issuecomment-256350006

https://stackoverflow.com/questions/35327947/engineyard-gem-failing-to-run-find-active-stub-by-path-reports-undefined-method

gem update --system

[kitkat119]

@AlexSusanu Thankyou so much for your help, that seems to have worked!