Possible incompatibility with Ruby 2.3.0

[ChrisBAshton]

A colleague seemed to consistently have issues when using 2.3.0. Downgrading to Ruby 2.2.0 fixed the issue.

/users/rajank01/.rvm/rubies/ruby-2.3.0/lib/ruby/2.3.0/rubygems/specification.rb:2158:in `method_missing': undefined method `this' for #<Gem::Specification:0x3fdfa4c0ca10 wraith-3.2.1> (NoMethodError)
    from /Users/rajank01/.rvm/rubies/ruby-2.3.0/lib/ruby/2.3.0/rubygems/specification.rb:1057:in `find_active_stub_by_path'
    from /Users/rajank01/.rvm/rubies/ruby-2.3.0/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:64:in `require'
    from /Users/rajank01/.rvm/gems/ruby-2.3.0/gems/wraith-3.2.1/bin/wraith:4:in `<top (required)>'
    from /Users/rajank01/.rvm/gems/ruby-2.3.0/bin/wraith:23:in `load'
    from /Users/rajank01/.rvm/gems/ruby-2.3.0/bin/wraith:23:in `<main>'
    from /Users/rajank01/.rvm/gems/ruby-2.3.0/bin/ruby_executable_hooks:15:in `eval'
    from /Users/rajank01/.rvm/gems/ruby-2.3.0/bin/ruby_executable_hooks:15:in `<main>'

[thedaviddias]

Same issue for me. I've got the same message with Ruby 2.3.0.