gem - require': no such file to load -- active_support/core_ext/logger -

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when rails s or rails c.. gives me error. tried removing rails , reinstalling uninstalled whole of ruby , reinstalled both rails ruby still same error. line 7 generating error require 'logger' ... running line in irb generates same error.. m using ruby1.9.2 , rails 3.0.6

been looking resolve error hours now... every thing working fine couple of days ago , seems break.. may added gem gemfile broke it.. 

/usr/local/ruby/lib/ruby/gems/1.9.1/gems/activesupport-3.0.6/lib/active_support/core_ext/logger.rb:19:in `require': no such file load -- logger (loaderror)     /usr/local/ruby/lib/ruby/gems/1.9.1/gems/activesupport-3.0.6/lib/active_support/core_ext/logger.rb:19:in `<top (required)>'     /usr/local/ruby/lib/ruby/gems/1.9.1/gems/railties-3.0.6/lib/rails.rb:7:in `require'     /usr/local/ruby/lib/ruby/gems/1.9.1/gems/railties-3.0.6/lib/rails.rb:7:in `<top (required)>'     /usr/local/ruby/lib/ruby/gems/1.9.1/gems/railties-3.0.6/lib/rails/all.rb:1:in `require'     /usr/local/ruby/lib/ruby/gems/1.9.1/gems/railties-3.0.6/lib/rails/all.rb:1:in `<top (required)>'     /home/milife/apps/justin/lifemap-webapp/config/application.rb:3:in `require'     /home/milife/apps/justin/lifemap-webapp/config/application.rb:3:in `<top (required)>'     /usr/local/ruby/lib/ruby/gems/1.9.1/gems/railties-3.0.6/lib/rails/commands.rb:28:in `require'     /usr/local/ruby/lib/ruby/gems/1.9.1/gems/railties-3.0.6/lib/rails/commands.rb:28:in `block in <top (required)>'     /usr/local/ruby/lib/ruby/gems/1.9.1/gems/railties-3.0.6/lib/rails/commands.rb:27:in `tap'     /usr/local/ruby/lib/ruby/gems/1.9.1/gems/railties-3.0.6/lib/rails/commands.rb:27:in `<top (required)>'     script/rails:6:in `require'     script/rails:6:in `<main>

it's old question, if me wanders here wondering how use activesupport's logger in non-rails applications, here how:

# gemfile gem 'activesupport'  # code require 'active_support/logger` file_logger = logger.new('../bot.txt', 'daily') logger = logger.new(stdout) logger.extend(activesupport::logger.broadcast(file_logger))

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