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新しいプロジェクトを作成する際にこのエラーが発生しますので、重複した質問に説明されている宝石のバージョンを追加します。"rails new blog"を使用して新しいアプリケーションを作成できません
新しいレールアプリケーションを作成しようとすると、このエラーが発生します。私は、コマンドrails -v
[email protected]:~/work/practice$ rails new blog
/home/umesh/.rvm/gems/ruby-2.3.1/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 /home/umesh/.rvm/gems/ruby-2.3.1/gems/thor-0.19.2/lib/thor/parser/option.rb:113:in `validate!'
from /home/umesh/.rvm/gems/ruby-2.3.1/gems/thor-0.19.2/lib/thor/parser/argument.rb:24:in `initialize'
from /home/umesh/.rvm/gems/ruby-2.3.1/gems/thor-0.19.2/lib/thor/parser/option.rb:9:in `initialize'
from /home/umesh/.rvm/gems/ruby-2.3.1/gems/thor-0.19.2/lib/thor/base.rb:544:in `new'
from /home/umesh/.rvm/gems/ruby-2.3.1/gems/thor-0.19.2/lib/thor/base.rb:544:in `build_option'
from /home/umesh/.rvm/gems/ruby-2.3.1/gems/thor-0.19.2/lib/thor/base.rb:278:in `class_option'
from /home/umesh/.rvm/gems/ruby-2.3.1/gems/railties-4.2.6/lib/rails/generators/base.rb:202:in `class_option'
from /home/umesh/.rvm/gems/ruby-2.3.1/gems/railties-4.2.6/lib/rails/generators/app_base.rb:71:in `add_shared_options_for'
from /home/umesh/.rvm/gems/ruby-2.3.1/gems/railties-4.2.6/lib/rails/generators/rails/app/app_generator.rb:160:in `<class:AppGenerator>'
from /home/umesh/.rvm/gems/ruby-2.3.1/gems/railties-4.2.6/lib/rails/generators/rails/app/app_generator.rb:159:in `<module:Generators>'
from /home/umesh/.rvm/gems/ruby-2.3.1/gems/railties-4.2.6/lib/rails/generators/rails/app/app_generator.rb:153:in `<module:Rails>'
from /home/umesh/.rvm/gems/ruby-2.3.1/gems/railties-4.2.6/lib/rails/generators/rails/app/app_generator.rb:3:in `<top (required)>'
from /home/umesh/.rvm/rubies/ruby-2.3.1/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:68:in `require'
from /home/umesh/.rvm/rubies/ruby-2.3.1/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:68:in `require'
from /home/umesh/.rvm/gems/ruby-2.3.1/gems/railties-4.2.6/lib/rails/commands/application.rb:2:in `<top (required)>'
from /home/umesh/.rvm/rubies/ruby-2.3.1/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:68:in `require'
from /home/umesh/.rvm/rubies/ruby-2.3.1/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:68:in `require'
from /home/umesh/.rvm/gems/ruby-2.3.1/gems/railties-4.2.6/lib/rails/cli.rb:14:in `<top (required)>'
from /home/umesh/.rvm/rubies/ruby-2.3.1/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:68:in `require'
from /home/umesh/.rvm/rubies/ruby-2.3.1/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:68:in `require'
from /home/umesh/.rvm/gems/ruby-2.3.1/gems/railties-4.2.6/bin/rails:9:in `<top (required)>'
from /home/umesh/.rvm/gems/ruby-2.3.1/bin/rails:23:in `load'
from /home/umesh/.rvm/gems/ruby-2.3.1/bin/rails:23:in `<main>'
from /home/umesh/.rvm/gems/ruby-2.3.1/bin/ruby_executable_hooks:15:in `eval'
from /home/umesh/.rvm/gems/ruby-2.3.1/bin/ruby_executable_hooks:15:in `<main>'
[email protected]:~/work/practice$
WindowsでRuby on Railsを実行すると、[Error "Validate \ _default \ _type！"：オプションのデフォルトはそのタイプ（ArgumentError）と一致する必要があります]（http://stackoverflow.com/questions/40823526）/error-validate-default-type-an-options-default-its-type-argumeに一致する必要があります） –