Install Debugger in Ruby 1.9.3
Download newer versions linecache19-0.5.13.gem and ruby-debug-base19-0.11.26.gem from http://rubyforge.org/frs/?group_id=8883 $ gem install ~/Downloads/linecache19-0.5.13.gem -- --with-ruby-include=$rvm_path/src/ruby-1.9.3-p0 Building native extensions. This could take a while... Successfully installed linecache19-0.5.13 1 gem installed $ gem install ~/Downloads/ruby-debug-base19-0.11.26.gem -- --with-ruby-include=$rvm_path/src/ruby-1.9.3-p0 Building native extensions. This could take a while... Successfully installed ruby-debug-base19-0.11.26 1 gem installed Add these in your gemfile gem 'linecache19', '0.5.13' gem 'ruby-debug-base19' gem 'ruby-debug19', :require => 'ruby-debug' if this doesn't work try this gem 'linecache19', '0.5.13', :path => "~/.rvm/gems/ruby-1.9.3-p0/gems/linecache19-0.5.13/" gem 'ruby-debug-base19', '0.11.26', :path => "~/.rvm/gems/ruby-1.9.3-p0/ge