# CRITICAL: Rails 3 error : parser.bundle unhandled exception! **URL:** \ **Category:** Rails\ **Created:** [January 20, 2010, 12:23pm UTC](https://www.ruby-forum.com/t/critical-rails-3-error-parser-bundle-unhandled-exception/181935 "2010-01-20T12:23:53Z")\ **Posts on this page:** 2\ **Page:** 1
**Author:** ![Kristian](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/k/e8c25b/32.png) [@Kristian](https://www.ruby-forum.com/u/Kristian)\ **Post date:** [January 20, 2010, 12:23pm UTC](https://www.ruby-forum.com/t/critical-rails-3-error-parser-bundle-unhandled-exception/181935/1 "2010-01-20T12:23:53Z")
kristian-mandrups-macbook-pro:rails3\_apps kristianconsult$ rails my\_r3 create create README create .gitignore create Rakefile create [config.ru](http://config.ru) create Gemfile create app … kristian-mandrups-macbook-pro:my\_r3 kristianconsult$ script/console /Users/kristianconsult/.gem/ruby/1.8/gems/json-1.1.9/ext/json/ext/ parser.bundle: unhandled exception from /opt/local/lib/ruby/site\_ruby/1.8/rubygems/custom\_require.rb: 31:in `require' from /opt/local/lib/ruby/gems/1.8/gems/activesupport-3.0.pre/lib/ active_support/dependencies.rb:167:in `require’ from /opt/local/lib/ruby/gems/1.8/gems/activesupport-3.0.pre/lib/ active\_support/dependencies.rb:537:in `new_constants_in' from /opt/local/lib/ruby/gems/1.8/gems/activesupport-3.0.pre/lib/ active_support/dependencies.rb:167:in `require’ from /Users/kristianconsult/.gem/ruby/1.8/gems/json-1.1.9/lib/json/ ext.rb:7 from /opt/local/lib/ruby/site\_ruby/1.8/rubygems/custom\_require.rb: 31:in `gem_original_require' from /opt/local/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb: 31:in `require’ from /opt/local/lib/ruby/gems/1.8/gems/activesupport-3.0.pre/lib/ active\_support/dependencies.rb:167:in `require' from /opt/local/lib/ruby/gems/1.8/gems/activesupport-3.0.pre/lib/ active_support/dependencies.rb:537:in `new\_constants\_in’ from /opt/local/lib/ruby/gems/1.8/gems/activesupport-3.0.pre/lib/ active\_support/dependencies.rb:167:in `require' from /Users/kristianconsult/.gem/ruby/1.8/gems/json-1.1.9/lib/json.rb: 6 from /opt/local/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb: 36:in `gem\_original\_require’ from /opt/local/lib/ruby/site\_ruby/1.8/rubygems/custom\_require.rb: 36:in `require' from /opt/local/lib/ruby/gems/1.8/gems/activesupport-3.0.pre/lib/ active_support/dependencies.rb:167:in `require’ from /opt/local/lib/ruby/gems/1.8/gems/activesupport-3.0.pre/lib/ active\_support/dependencies.rb:537:in `new_constants_in' from /opt/local/lib/ruby/gems/1.8/gems/activesupport-3.0.pre/lib/ active_support/dependencies.rb:167:in `require’ from /opt/local/lib/ruby/gems/1.8/gems/activesupport-3.0.pre/lib/ active\_support/json/encoding.rb:13 from /opt/local/lib/ruby/site\_ruby/1.8/rubygems/custom\_require.rb: 31:in `gem_original_require' from /opt/local/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb: 31:in `require’ from /opt/local/lib/ruby/gems/1.8/gems/activesupport-3.0.pre/lib/ active\_support/dependencies.rb:167:in `require' from /opt/local/lib/ruby/gems/1.8/gems/activesupport-3.0.pre/lib/ active_support/dependencies.rb:537:in `new\_constants\_in’ from /opt/local/lib/ruby/gems/1.8/gems/activesupport-3.0.pre/lib/ active\_support/dependencies.rb:167:in `require' from /opt/local/lib/ruby/gems/1.8/gems/activesupport-3.0.pre/lib/ active_support/json.rb:2 from /opt/local/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb: 31:in `gem\_original\_require’ from /opt/local/lib/ruby/site\_ruby/1.8/rubygems/custom\_require.rb: 31:in `require' from /opt/local/lib/ruby/gems/1.8/gems/activesupport-3.0.pre/lib/ active_support/dependencies.rb:167:in `require’ from /opt/local/lib/ruby/gems/1.8/gems/activesupport-3.0.pre/lib/ active\_support/dependencies.rb:537:in `new_constants_in' from /opt/local/lib/ruby/gems/1.8/gems/activesupport-3.0.pre/lib/ active_support/dependencies.rb:167:in `require’ from /opt/local/lib/ruby/gems/1.8/gems/activemodel-3.0.pre/lib/ active\_model/serializers/json.rb:1 from /opt/local/lib/ruby/gems/1.8/gems/activerecord-3.0.pre/lib/ active\_record/serialization.rb:4 from /opt/local/lib/ruby/gems/1.8/gems/activerecord-3.0.pre/lib/ active\_record/base.rb:2745 from /opt/local/lib/ruby/gems/1.8/gems/activerecord-3.0.pre/lib/ active\_record/base.rb:2724:in `class_eval' from /opt/local/lib/ruby/gems/1.8/gems/activerecord-3.0.pre/lib/ active_record/base.rb:2724 from /opt/local/lib/ruby/gems/1.8/gems/activerecord-3.0.pre/lib/ active_record.rb:142 from /opt/local/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb: 31:in `gem\_original\_require’ from /opt/local/lib/ruby/site\_ruby/1.8/rubygems/custom\_require.rb: 31:in `require' from /opt/local/lib/ruby/gems/1.8/gems/activerecord-3.0.pre/lib/ active_record/railtie.rb:5 from /opt/local/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb: 36:in `gem\_original\_require’ from /opt/local/lib/ruby/site\_ruby/1.8/rubygems/custom\_require.rb: 36:in `require' from /opt/local/lib/ruby/gems/1.8/gems/railties-3.0.pre/lib/rails/ all.rb:12 from /opt/local/lib/ruby/gems/1.8/gems/railties-3.0.pre/lib/rails/ all.rb:5:in `each’ from /opt/local/lib/ruby/gems/1.8/gems/railties-3.0.pre/lib/rails/ all.rb:5 from /opt/local/lib/ruby/site\_ruby/1.8/rubygems/custom\_require.rb: 36:in `gem_original_require' from /opt/local/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb: 36:in `require’ from /Users/kristianconsult/my\_rails/rails3\_apps/my\_r3/config/boot.rb: 16 from script/console:2:in `require’ from script/console:2 kristian-mandrups-macbook-pro:my\_r3 kristianconsult$ gem list bundler \*\*\* LOCAL GEMS \*\*\* bundler (0.8.1, 0.7.1) kristian-mandrups-macbook-pro:my\_r3 kristianconsult$ ruby -v ruby 1.8.7 (2009-06-12 patchlevel 174) [i686-darwin10] Any ideas? ---
**Author:** ![Kristian](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/k/e8c25b/32.png) [@Kristian](https://www.ruby-forum.com/u/Kristian)\ **Post date:** [January 20, 2010, 12:28pm UTC](https://www.ruby-forum.com/t/critical-rails-3-error-parser-bundle-unhandled-exception/181935/2 "2010-01-20T12:28:34Z")
Turns out the problem was with the old version of the json gem! Just needed to upgrade it 🙂 kristian-mandrups-macbook-pro:my\_r3 kristianconsult$ sudo gem install json Password: Building native extensions. This could take a while… Successfully installed json-1.2.0 1 gem installed Installing ri documentation for json-1.2.0… Installing RDoc documentation for json-1.2.0… kristian-mandrups-macbook-pro:my\_r3 kristianconsult$ script/console Loading development environment (Rails 3.0.pre) irb(main):001:0\>