gem list でrailsは確認できるのに、rails -v でエラーのようなものが出てしまう。

Question

省略なしの全文は下にはりました。

$ gem list
*** LOCAL GEMS ***

(省略)
nokogiri (1.6.8.1)
rails (4.2.3, 4.2.1)
(省略)

rails (4.2.3, 4.2.1)は確認できると思いますが、

$ rails -v
/Users/user/.rbenv/versions/2.2.1/lib/ruby/gems/2.2.0/gems/thor-0.19.2/lib/thor/parser/option.rb:130:in `validate_default_type!': An option's default must match its type. (ArgumentError)
  from /Users/user/.rbenv/versions/2.2.1/lib/ruby/gems/2.2.0/gems/thor-0.19.2/lib/thor/parser/option.rb:113:in `validate!'
(省略)
  from /Users/user/.rbenv/versions/2.2.1/bin/rails:23:in `load'
  from /Users/user/.rbenv/versions/2.2.1/bin/rails:23:in `<main>'

と出てしまいます。
どのようなエラーかよくわからないため、教えていただきたいです。
よろしくお願いします。

以下省略なしの全文

$ gem list
*** LOCAL GEMS ***

actionmailer (4.2.3, 4.2.1)
actionpack (4.2.3, 4.2.1)
actionview (4.2.3, 4.2.1)
activejob (4.2.3, 4.2.1)
activemodel (4.2.3, 4.2.1)
activerecord (4.2.3, 4.2.1)
activesupport (4.2.3, 4.2.1)
arel (6.0.3)
bigdecimal (1.2.6)
builder (3.2.2)
bundler (1.13.6)
concurrent-ruby (1.0.2)
erubis (2.7.0)
globalid (0.3.7)
i18n (0.7.0)
io-console (0.4.3)
json (1.8.1)
loofah (2.0.3)
mail (2.6.4)
mime-types (3.1)
mime-types-data (3.2016.0521)
mini_portile2 (2.1.0)
minitest (5.4.3)
nokogiri (1.6.8.1)
power_assert (0.2.2)
psych (2.0.8)
rack (1.6.5)
rack-test (0.6.3)
rails (4.2.3, 4.2.1)
rails-deprecated_sanitizer (1.0.3)
rails-dom-testing (1.0.7)
rails-html-sanitizer (1.0.3)
railties (4.2.3, 4.2.1)
rake (10.4.2)
rdoc (4.2.0)
sprockets (3.7.0)
sprockets-rails (3.2.0)
test-unit (3.0.8)
thor (0.19.2)
thread_safe (0.3.5)
tzinfo (1.2.2)

$ rails -v
/Users/user/.rbenv/versions/2.2.1/lib/ruby/gems/2.2.0/gems/thor-0.19.2/lib/thor/parser/option.rb:130:in `validate_default_type!': An option's default must match its type. (ArgumentError)
  from /Users/user/.rbenv/versions/2.2.1/lib/ruby/gems/2.2.0/gems/thor-0.19.2/lib/thor/parser/option.rb:113:in `validate!'
  from /Users/user/.rbenv/versions/2.2.1/lib/ruby/gems/2.2.0/gems/thor-0.19.2/lib/thor/parser/argument.rb:24:in `initialize'
  from /Users/user/.rbenv/versions/2.2.1/lib/ruby/gems/2.2.0/gems/thor-0.19.2/lib/thor/parser/option.rb:9:in `initialize'
  from /Users/user/.rbenv/versions/2.2.1/lib/ruby/gems/2.2.0/gems/thor-0.19.2/lib/thor/base.rb:544:in `new'
  from /Users/user/.rbenv/versions/2.2.1/lib/ruby/gems/2.2.0/gems/thor-0.19.2/lib/thor/base.rb:544:in `build_option'
  from /Users/user/.rbenv/versions/2.2.1/lib/ruby/gems/2.2.0/gems/thor-0.19.2/lib/thor/base.rb:278:in `class_option'
  from /Users/user/.rbenv/versions/2.2.1/lib/ruby/gems/2.2.0/gems/railties-4.2.3/lib/rails/generators/base.rb:202:in `class_option'
  from /Users/user/.rbenv/versions/2.2.1/lib/ruby/gems/2.2.0/gems/railties-4.2.3/lib/rails/generators/app_base.rb:71:in `add_shared_options_for'
  from /Users/user/.rbenv/versions/2.2.1/lib/ruby/gems/2.2.0/gems/railties-4.2.3/lib/rails/generators/rails/app/app_generator.rb:160:in `<class:AppGenerator>'
  from /Users/user/.rbenv/versions/2.2.1/lib/ruby/gems/2.2.0/gems/railties-4.2.3/lib/rails/generators/rails/app/app_generator.rb:159:in `<module:Generators>'
  from /Users/user/.rbenv/versions/2.2.1/lib/ruby/gems/2.2.0/gems/railties-4.2.3/lib/rails/generators/rails/app/app_generator.rb:153:in `<module:Rails>'
  from /Users/user/.rbenv/versions/2.2.1/lib/ruby/gems/2.2.0/gems/railties-4.2.3/lib/rails/generators/rails/app/app_generator.rb:3:in `<top (required)>'
  from /Users/user/.rbenv/versions/2.2.1/lib/ruby/2.2.0/rubygems/core_ext/kernel_require.rb:54:in `require'
  from /Users/user/.rbenv/versions/2.2.1/lib/ruby/2.2.0/rubygems/core_ext/kernel_require.rb:54:in `require'
  from /Users/user/.rbenv/versions/2.2.1/lib/ruby/gems/2.2.0/gems/railties-4.2.3/lib/rails/commands/application.rb:2:in `<top (required)>'
  from /Users/user/.rbenv/versions/2.2.1/lib/ruby/2.2.0/rubygems/core_ext/kernel_require.rb:54:in `require'
  from /Users/user/.rbenv/versions/2.2.1/lib/ruby/2.2.0/rubygems/core_ext/kernel_require.rb:54:in `require'
  from /Users/user/.rbenv/versions/2.2.1/lib/ruby/gems/2.2.0/gems/railties-4.2.3/lib/rails/cli.rb:14:in `<top (required)>'
  from /Users/user/.rbenv/versions/2.2.1/lib/ruby/2.2.0/rubygems/core_ext/kernel_require.rb:54:in `require'
  from /Users/user/.rbenv/versions/2.2.1/lib/ruby/2.2.0/rubygems/core_ext/kernel_require.rb:54:in `require'
  from /Users/user/.rbenv/versions/2.2.1/lib/ruby/gems/2.2.0/gems/railties-4.2.3/bin/rails:9:in `<top (required)>'
  from /Users/user/.rbenv/versions/2.2.1/bin/rails:23:in `load'
  from /Users/user/.rbenv/versions/2.2.1/bin/rails:23:in `<main>'

Answer 1

https://github.com/erikhuda/thor/commit/605897b5a02f10a4687237667cafa8dda6ae2016
最新版(0.19.4)では、この問題は解決しているみたいです。

Answer 2

どうやら、thorのバージョン0.19.2で問題が発生したようです。とりあえず、以下のコマンドで0.19.1に戻すと回避できると思います（StackOverflow）。

gem uninstall thor
gem install thor -v 0.19.1

Comments

[退会済みユーザー]

できました！ありがとうございます!!