在运行命令rails server时，我遇到了异常
[2016-06-26 13:21:57] INFO WEBrick 1.3.1
[2016-06-26 13:21:57] INFO ruby 2.1.3 (2014-09-19) [x86_64-linux-gnu]
[2016-06-26 13:21:57] INFO WEBrick::HTTPServer#start: pid=2471 port=3000
[2016-06-26 13:22:08] ERROR LoadError: cannot load such file -- active_support/security_utils
/usr/lib64/ruby/gems/2.1.0/gems/activesupport-3.2.17/lib/active_support/dependencies.rb:251:in `require'
/usr/lib64/ruby/gems/2.1.0/gems/activesupport-3.2.17/lib/active_support/dependencies.rb:251:in `block in require'
/usr/lib64/ruby/gems/2.1.0/gems/activesupport-3.2.17/lib/active_support/dependencies.rb:236:in `load_dependency'
/usr/lib64/ruby/gems/2.1.0/gems/activesupport-3.2.17/lib/active_support/dependencies.rb:251:in `require'
/usr/lib64/ruby/gems/2.1.0/gems/actionpack-3.2.17/lib/action_controller/metal/http_authentication.rb:3:in `<top (required)>'
/usr/lib64/ruby/gems/2.1.0/gems/actionpack-3.2.17/lib/action_controller/base.rb:206:in `<class:Base>'
/usr/lib64/ruby/gems/2.1.0/gems/actionpack-3.2.17/lib/action_controller/base.rb:171:in `<module:ActionController>'
/usr/lib64/ruby/gems/2.1.0/gems/actionpack-3.2.17/lib/action_controller/base.rb:3:in `<top (required)>'
/usr/lib64/ruby/gems/2.1.0/gems/actionpack-3.2.17/lib/action_dispatch/middleware/static.rb:32:in `ext'
/usr/lib64/ruby/gems/2.1.0/gems/actionpack-3.2.17/lib/action_dispatch/middleware/static.rb:16:in `match?'
/usr/lib64/ruby/gems/2.1.0/gems/actionpack-3.2.17/lib/action_dispatch/middleware/static.rb:77:in `call'
/usr/lib64/ruby/gems/2.1.0/gems/railties-3.2.17/lib/rails/engine.rb:484:in `call'
/usr/lib64/ruby/gems/2.1.0/gems/railties-3.2.17/lib/rails/application.rb:231:in `call'
/usr/lib64/ruby/gems/2.1.0/gems/rack-1.4.7/lib/rack/content_length.rb:14:in `call'
/usr/lib64/ruby/gems/2.1.0/gems/railties-3.2.17/lib/rails/rack/log_tailer.rb:17:in `call'
/usr/lib64/ruby/gems/2.1.0/gems/rack-1.4.7/lib/rack/handler/webrick.rb:59:in `service'
/usr/lib64/ruby/2.1.0/webrick/httpserver.rb:138:in `service'
/usr/lib64/ruby/2.1.0/webrick/httpserver.rb:94:in `run'
/usr/lib64/ruby/2.1.0/webrick/server.rb:295:in `block in start_thread'
[2016-06-26 13:22:08] ERROR LoadError: cannot load such file -- active_support/security_utils
/usr/lib64/ruby/gems/2.1.0/gems/activesupport-3.2.17/lib/active_support/dependencies.rb:
我的宝石文件看起来像这样 宝石 远程：https://rubygems.org/
specs:
actionmailer (3.2.17)
actionpack (= 3.2.17)
mail (~> 2.5.4)
actionpack (3.2.17)
activemodel (= 3.2.17)
activesupport (= 3.2.17)
builder (~> 3.0.0)
erubis (~> 2.7.0)
journey (~> 1.0.4)
rack (~> 1.4.5)
rack-cache (~> 1.2)
rack-test (~> 0.6.1)
sprockets (~> 2.2.1)
activemodel (3.2.17)
activesupport (= 3.2.17)
builder (~> 3.0.0)
activerecord (3.2.17)
activemodel (= 3.2.17)
activesupport (= 3.2.17)
arel (~> 3.0.2)
tzinfo (~> 0.3.29)
activeresource (3.2.17)
activemodel (= 3.2.17)
activesupport (= 3.2.17)
activesupport (3.2.17)
i18n (~> 0.6, >= 0.6.4)
multi_json (~> 1.0)
arel (3.0.3)
builder (3.0.4)
coffee-rails (3.2.2)
coffee-script (>= 2.2.0)
railties (~> 3.2.0)
coffee-script (2.4.1)
coffee-script-source
execjs
coffee-script-source (1.10.0)
erubis (2.7.0)
execjs (2.7.0)
hike (1.2.3)
i18n (0.7.0)
journey (1.0.4)
jquery-rails (3.1.4)
railties (>= 3.0, < 5.0)
thor (>= 0.14, < 2.0)
json (1.8.3)
mail (2.5.4)
mime-types (~> 1.16)
treetop (~> 1.4.8)
mime-types (1.25.1)
multi_json (1.12.1)
polyglot (0.3.5)
rack (1.4.7)
rack-cache (1.6.1)
rack (>= 0.4)
rack-ssl (1.3.4)
rack
rack-test (0.6.3)
rack (>= 1.0)
rails (3.2.17)
actionmailer (= 3.2.17)
actionpack (= 3.2.17)
activerecord (= 3.2.17)
activeresource (= 3.2.17)
activesupport (= 3.2.17)
bundler (~> 1.0)
railties (= 3.2.17)
railties (3.2.17)
actionpack (= 3.2.17)
activesupport (= 3.2.17)
rack-ssl (~> 1.3.2)
rake (>= 0.8.7)
rdoc (~> 3.4)
thor (>= 0.14.6, < 2.0)
rake (11.2.2)
rdoc (3.12.2)
json (~> 1.4)
sass (3.4.22)
sass-rails (3.2.6)
railties (~> 3.2.0)
sass (>= 3.1.10)
tilt (~> 1.3)
sprockets (2.2.3)
hike (~> 1.2)
multi_json (~> 1.0)
rack (~> 1.0)
tilt (~> 1.1, != 1.3.0)
sqlite3 (1.3.11)
thor (0.19.1)
tilt (1.4.1)
treetop (1.4.15)
polyglot
polyglot (>= 0.3.1)
tzinfo (0.3.50)
uglifier (3.0.0)
execjs (>= 0.3.0, < 3)
PLATFORMS
ruby
DEPENDENCIES
coffee-rails (~> 3.2.1)
jquery-rails
rails (= 3.2.17)
sass-rails (~> 3.2.3)
sqlite3
uglifier (>= 1.0.3)
BUNDLED WITH
1.12.5
ActiveSupport已经存在/usr/lib64/ruby/gems/2.1.0/gems/activesupport-3.2.17
Ruby版ruby 2.1.3p242（2014-09-19修订版47630）[x86_64-linux-gnu]