Rails 4 Server无法启动（活动支持）

Question

我将我的应用程序从Rails 3.2升级到Rails 4，并在尝试启动开发中的服务器时遇到此错误。 有关如何解决此问题的任何想法？

/Users/timkleier/.rvm/gems/ruby-2.0.0-p247/gems/activesupport-4.0.0/lib/active_support/dependencies/autoload.rb:1:in `require': /Users/timkleier/.rvm/gems/ruby-2.0.0-p247/gems/activesupport-4.0.0/lib/active_support/inflector/methods.rb:128: undefined (?...) sequence: /\b(?<!['\342\200\231`])[a-z]/ (SyntaxError)
from /Users/timkleier/.rvm/gems/ruby-2.0.0-p247/gems/activesupport-4.0.0/lib/active_support/dependencies/autoload.rb:1
from /Users/timkleier/.rvm/gems/ruby-2.0.0-p247/gems/activesupport-4.0.0/lib/active_support.rb:25:in `require'
from /Users/timkleier/.rvm/gems/ruby-2.0.0-p247/gems/activesupport-4.0.0/lib/active_support.rb:25
from /Users/timkleier/.rvm/gems/ruby-2.0.0-p247/gems/actionpack-4.0.0/lib/action_dispatch.rb:24:in `require'
from /Users/timkleier/.rvm/gems/ruby-2.0.0-p247/gems/actionpack-4.0.0/lib/action_dispatch.rb:24
from /Users/timkleier/.rvm/gems/ruby-2.0.0-p247/gems/railties-4.0.0/lib/rails/commands/server.rb:3:in `require'
from /Users/timkleier/.rvm/gems/ruby-2.0.0-p247/gems/railties-4.0.0/lib/rails/commands/server.rb:3
from /Users/timkleier/.rvm/gems/ruby-2.0.0-p247/gems/railties-4.0.0/lib/rails/commands.rb:72:in `require'
from /Users/timkleier/.rvm/gems/ruby-2.0.0-p247/gems/railties-4.0.0/lib/rails/commands.rb:72
from script/rails:6:in `require'
from script/rails:6

这是我的Gemfile以及相关的gem：

source 'http://rubygems.org'

gem 'rails', '4.0.0'
gem 'activerecord'

gem 'execjs'
gem 'therubyracer'
gem "composite_primary_keys", :git => 'git://github.com/drnic/composite_primary_keys.git', :branch => 'ar_4.0.x'
gem "tiny_tds", "~> 0.5.1"

gem 'twitter-bootstrap-rails'
gem "less-rails"

gem 'sass-rails', '4.0.0'
gem 'uglifier', '2.1.1'
gem 'coffee-rails', '4.0.0'
gem 'jquery-rails', '2.2.1'

在config / application.rb中，我根据这篇文章注释掉了Active Resource，但这似乎无关。

Answer 1

产生语法错误的gsub包括<Ruby 1.9.3中不支持的Regexp语法，并且在那些版本中似乎也会产生相同的错误。 但是，您的路径显示的是Ruby 2.0.0，这很奇怪，因此我不确定是怎么回事。

希望这给您带来了更多帮助，也许请看一下Ruby的安装。