MacでRailsサーバを起動するときに問題が発生する

Question

Rails 4.2.3を使用したいと思っています。私はrbenvとgemを使ってインストールしました。サーバーを起動するとき、私はこのエラーを取得する：あなたはルビー2.4を実行している

rails server 
=> Booting WEBrick 
=> Rails 4.2.3 application starting in development on http://localhost:3000 
=> Run `rails server -h` for more startup options 
=> Ctrl-C to shutdown server 
/Users/macuser/.rbenv/versions/2.4.0/lib/ruby/gems/2.4.0/gems/activesupport-4.2.3/lib/active_support/core_ext/numeric/conversions.rb:121: warning: constant ::Fixnum is deprecated 
/Users/macuser/.rbenv/versions/2.4.0/lib/ruby/gems/2.4.0/gems/activesupport-4.2.3/lib/active_support/core_ext/numeric/conversions.rb:121: warning: constant ::Bignum is deprecated 
Exiting 
/Users/macuser/.rbenv/versions/2.4.0/lib/ruby/gems/2.4.0/gems/activesupport-4.2.3/lib/active_support/core_ext/numeric/conversions.rb:124:in `block (2 levels) in <class:Numeric>': stack level too deep (SystemStackError) 
    from /Users/macuser/.rbenv/versions/2.4.0/lib/ruby/gems/2.4.0/gems/activesupport-4.2.3/lib/active_support/core_ext/numeric/conversions.rb:131:in `block (2 levels) in <class:Numeric>' 
    from /Users/macuser/.rbenv/versions/2.4.0/lib/ruby/gems/2.4.0/gems/activesupport-4.2.3/lib/active_support/core_ext/numeric/conversions.rb:131:in `block (2 levels) in <class:Numeric>' 
    from /Users/macuser/.rbenv/versions/2.4.0/lib/ruby/gems/2.4.0/gems/activesupport-4.2.3/lib/active_support/core_ext/numeric/conversions.rb:131:in `block (2 levels) in <class:Numeric>' 
    from /Users/macuser/.rbenv/versions/2.4.0/lib/ruby/gems/2.4.0/gems/activesupport-4.2.3/lib/active_support/core_ext/numeric/conversions.rb:131:in `block (2 levels) in <class:Numeric>' 
    from /Users/macuser/.rbenv/versions/2.4.0/lib/ruby/gems/2.4.0/gems/activesupport-4.2.3/lib/active_support/core_ext/numeric/conversions.rb:131:in `block (2 levels) in <class:Numeric>' 
    from /Users/macuser/.rbenv/versions/2.4.0/lib/ruby/gems/2.4.0/gems/activesupport-4.2.3/lib/active_support/core_ext/numeric/conversions.rb:131:in `block (2 levels) in <class:Numeric>' 
    from /Users/macuser/.rbenv/versions/2.4.0/lib/ruby/gems/2.4.0/gems/activesupport-4.2.3/lib/active_support/core_ext/numeric/conversions.rb:131:in `block (2 levels) in <class:Numeric>' 
    from /Users/macuser/.rbenv/versions/2.4.0/lib/ruby/gems/2.4.0/gems/activesupport-4.2.3/lib/active_support/core_ext/numeric/conversions.rb:131:in `block (2 levels) in <class:Numeric>' 
    ... 5542 levels... 
    from /Users/macuser/.rbenv/versions/2.4.0/lib/ruby/2.4.0/rubygems/core_ext/kernel_require.rb:55:in `require' 
    from /Users/macuser/dreamer_me/bin/spring:15:in `<top (required)>' 
    from bin/rails:3:in `load' 
    from bin/rails:3:in `<main>' 

Answer 1

、あなたはアプリレベルで.ruby-versionファイルでそれを設定して、Rubyのバージョンを変更することができます。

# .ruby-version 
2.2.2 

またはあなたが好きなもの。ルビーのバージョンを確認することができます

$ rbenv versions