ruby-on-rails - rails new および rails -v でこのエラーがスローされる

Question

rails -vやrails newを実行するとこうなりました。いじり回したこともありません。インストールを破棄してレールを再インストールする前に、ここに投稿すると思いました。

私のインストールが撃たれたと仮定して

 /Users/fugazy/.rvm/rubies/ruby-1.9.3-p392/lib/ruby/site_ruby/1.9.1/rubygems/core_ext/kernel_require.rb:112:in `require': /Users/fugazy/.rvm/gems/ruby-1.9.3-p392/gems/rails-0.13.1/lib/rails_generator/options.rb:124: syntax error, unexpected '[', expecting '|' (SyntaxError)
    ...make any changes.') { |options[:pretend]| }
    ...                               ^
    /Users/fugazy/.rvm/gems/ruby-1.9.3-p392/gems/rails-0.13.1/lib/rails_generator/options.rb:127: syntax error, unexpected '[', expecting '|'
    ...ss normal output.') { |options[:quiet]| }
    ...                               ^
    /Users/fugazy/.rvm/gems/ruby-1.9.3-p392/gems/rails-0.13.1/lib/rails_generator/options.rb:128: syntax error, unexpected '[', expecting '|'
    ...ktrace on errors.') { |options[:backtrace]| }
    ...                               ^
    /Users/fugazy/.rvm/gems/ruby-1.9.3-p392/gems/rails-0.13.1/lib/rails_generator/options.rb:129: syntax error, unexpected '[', expecting '|'
    ...his help message.') { |options[:help]| }
    ...                               ^
      from /Users/fugazy/.rvm/rubies/ruby-1.9.3-p392/lib/ruby/site_ruby/1.9.1/rubygems/core_ext/kernel_require.rb:112:in `require'
      from /Users/fugazy/.rvm/gems/ruby-1.9.3-p392/gems/rails-0.13.1/lib/rails_generator/base.rb:1:in `<top (required)>'
      from /Users/fugazy/.rvm/rubies/ruby-1.9.3-p392/lib/ruby/site_ruby/1.9.1/rubygems/core_ext/kernel_require.rb:112:in `require'
      from /Users/fugazy/.rvm/rubies/ruby-1.9.3-p392/lib/ruby/site_ruby/1.9.1/rubygems/core_ext/kernel_require.rb:112:in `require'
      from /Users/fugazy/.rvm/gems/ruby-1.9.3-p392/gems/rails-0.13.1/lib/rails_generator.rb:34:in `<top (required)>'
      from /Users/fugazy/.rvm/rubies/ruby-1.9.3-p392/lib/ruby/site_ruby/1.9.1/rubygems/core_ext/kernel_require.rb:112:in `require'
      from /Users/fugazy/.rvm/rubies/ruby-1.9.3-p392/lib/ruby/site_ruby/1.9.1/rubygems/core_ext/kernel_require.rb:112:in `require'
      from /Users/fugazy/.rvm/gems/ruby-1.9.3-p392/gems/rails-0.13.1/bin/rails:14:in `<top (required)>'
      from /Users/fugazy/.rvm/gems/ruby-1.9.3-p392/bin/rails:19:in `load'
      from /Users/fugazy/.rvm/gems/ruby-1.9.3-p392/bin/rails:19:in `<main>'
      from /Users/fugazy/.rvm/gems/ruby-1.9.3-p392/bin/ruby_noexec_wrapper:14:in `eval'
      from /Users/fugazy/.rvm/gems/ruby-1.9.3-p392/bin/ruby_noexec_wrapper:14:in `<main>'