Ruby on Rails incompatible bibliothèque

Je viens de commencer à regarder ruby on rails et ne peut pas obtenir un serveur pour exécuter. Je suis en cours d'exécution ruby 2.3.0 et les rails 4.2.5 et après j'ai de nouveaux projets ferroviaires j'essaie d'exécuter bin/rails server mais obtiens l'erreur suivante:

Warning: Running `gem pristine --all` to regenerate your installed gemspecs (and deleting then reinstalling your bundle if you use bundle --path) will improve the startup performance of Spring.
/Users/John/.rvm/gems/ruby-head/gems/json-1.8.3/lib/json/ext.rb:13:in `require': incompatible library version - /Users/John/.rvm/gems/ruby-head/gems/json-1.8.3/lib/json/ext/parser.bundle (fatal)
from /Users/John/.rvm/gems/ruby-head/gems/json-1.8.3/lib/json/ext.rb:13:in `<module:Ext>'
from /Users/John/.rvm/gems/ruby-head/gems/json-1.8.3/lib/json/ext.rb:12:in `<module:JSON>'
from /Users/John/.rvm/gems/ruby-head/gems/json-1.8.3/lib/json/ext.rb:9:in `<top (required)>'
from /Users/John/.rvm/gems/ruby-head/gems/json-1.8.3/lib/json.rb:58:in `require'
from /Users/John/.rvm/gems/ruby-head/gems/json-1.8.3/lib/json.rb:58:in `<module:JSON>'
from /Users/John/.rvm/gems/ruby-head/gems/json-1.8.3/lib/json.rb:54:in `<top (required)>'
from /Users/John/.rvm/gems/ruby-head/gems/activesupport-4.2.5/lib/active_support/core_ext/object/json.rb:2:in `require'
from /Users/John/.rvm/gems/ruby-head/gems/activesupport-4.2.5/lib/active_support/core_ext/object/json.rb:2:in `<top (required)>'
from /Users/John/.rvm/gems/ruby-head/gems/activesupport-4.2.5/lib/active_support/core_ext/object.rb:12:in `require'
from /Users/John/.rvm/gems/ruby-head/gems/activesupport-4.2.5/lib/active_support/core_ext/object.rb:12:in `<top (required)>'
from /Users/John/.rvm/gems/ruby-head/gems/railties-4.2.5/lib/rails/configuration.rb:2:in `require'
from /Users/John/.rvm/gems/ruby-head/gems/railties-4.2.5/lib/rails/configuration.rb:2:in `<top (required)>'
from /Users/John/.rvm/gems/ruby-head/gems/railties-4.2.5/lib/rails/railtie.rb:2:in `require'
from /Users/John/.rvm/gems/ruby-head/gems/railties-4.2.5/lib/rails/railtie.rb:2:in `<top (required)>'
from /Users/John/.rvm/gems/ruby-head/gems/railties-4.2.5/lib/rails/engine.rb:1:in `require'
from /Users/John/.rvm/gems/ruby-head/gems/railties-4.2.5/lib/rails/engine.rb:1:in `<top (required)>'
from /Users/John/.rvm/gems/ruby-head/gems/railties-4.2.5/lib/rails/application.rb:7:in `require'
from /Users/John/.rvm/gems/ruby-head/gems/railties-4.2.5/lib/rails/application.rb:7:in `<top (required)>'
from /Users/John/.rvm/gems/ruby-head/gems/railties-4.2.5/lib/rails.rb:11:in `require'
from /Users/John/.rvm/gems/ruby-head/gems/railties-4.2.5/lib/rails.rb:11:in `<top (required)>'
from /Users/John/.rvm/gems/ruby-head/gems/railties-4.2.5/lib/rails/commands/server.rb:4:in `require'
from /Users/John/.rvm/gems/ruby-head/gems/railties-4.2.5/lib/rails/commands/server.rb:4:in `<top (required)>'
from /Users/John/.rvm/gems/ruby-head/gems/railties-4.2.5/lib/rails/commands/commands_tasks.rb:123:in `require'
from /Users/John/.rvm/gems/ruby-head/gems/railties-4.2.5/lib/rails/commands/commands_tasks.rb:123:in `require_command!'
from /Users/John/.rvm/gems/ruby-head/gems/railties-4.2.5/lib/rails/commands/commands_tasks.rb:73:in `server'
from /Users/John/.rvm/gems/ruby-head/gems/railties-4.2.5/lib/rails/commands/commands_tasks.rb:39:in `run_command!'
from /Users/John/.rvm/gems/ruby-head/gems/railties-4.2.5/lib/rails/commands.rb:17:in `<top (required)>'
from /Users/John/Developer/Rails/blog/bin/rails:9:in `require'
from /Users/John/Developer/Rails/blog/bin/rails:9:in `<top (required)>'
from /Users/John/.rvm/gems/ruby-head/gems/spring-1.6.1/lib/spring/client/rails.rb:28:in `load'
from /Users/John/.rvm/gems/ruby-head/gems/spring-1.6.1/lib/spring/client/rails.rb:28:in `call'
from /Users/John/.rvm/gems/ruby-head/gems/spring-1.6.1/lib/spring/client/command.rb:7:in `call'
from /Users/John/.rvm/gems/ruby-head/gems/spring-1.6.1/lib/spring/client.rb:28:in `run'
from /Users/John/.rvm/gems/ruby-head/gems/spring-1.6.1/bin/spring:51:in `<top (required)>'
from /Users/John/.rvm/gems/ruby-head/gems/spring-1.6.1/lib/spring/binstub.rb:11:in `load'
from /Users/John/.rvm/gems/ruby-head/gems/spring-1.6.1/lib/spring/binstub.rb:11:in `<top (required)>'
from /Users/John/.rvm/rubies/ruby-head/lib/ruby/site_ruby/2.3.0/rubygems/core_ext/kernel_require.rb:54:in `require'
from /Users/John/.rvm/rubies/ruby-head/lib/ruby/site_ruby/2.3.0/rubygems/core_ext/kernel_require.rb:54:in `require'
from /Users/John/Developer/Rails/blog/bin/spring:13:in `<top (required)>'
from bin/rails:3:in `load'
from bin/rails:3:in `<main>'

Gem liste dit que j'ai json (1.8.3, 1.8.2). J'ai aussi essayé de réinstaller les rails et la mise à jour de ma version de ruby par rvm. Toute idée de ce qui est mal? J'ai essayé de regarder autour en ligne, mais je suis un peu coincé, surtout que je n'ai jamais utilisé les rails avant et seulement un peu de ruby.

Êtes-vous à l'aide de Windows ou Linux?
il semble que les extensions natives pour json ne sont pas compilés.
Je suis l'aide de mac OS X
Le même problème se produire lorsque vous exécutez bundle exec rails server? Ne bundle check exécuter avec succès? Est json mentionné dans votre Gemfile.lock?
bundle exec rails server échoue également. bundle check s'exécute avec succès, le retour The Gemfile's dependencies are satisfied. json est dans Gemfile.lock plusieurs temps, par exemple la cat gemfile.lock | grep json me donne json (~> 1.7, >= 1.7.7) multi_json (~> 1.2) json (1.8.3) multi_json (1.11.2) json (~> 1.4) json (~> 1.7, >= 1.7.7) json (>= 1.8.0)

OriginalL'auteur John P | 2015-12-26