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Installing ruby-debug with ruby-1.9.3-p0

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### UPDATE: ruby-debuy19 is no longer maintained, use https://github.com/cldwalker/debugger
 
# Install with:
# bash < <(curl -L https://raw.github.com/gist/1333785)
#
# Reference: http://blog.wyeworks.com/2011/11/1/ruby-1-9-3-and-ruby-debug
 
echo "Installing ruby-debug with ruby-1.9.3-p0 ..."
 
curl -OL http://rubyforge.org/frs/download.php/75414/linecache19-0.5.13.gem
curl -OL http://rubyforge.org/frs/download.php/75415/ruby-debug-base19-0.11.26.gem
 
gem install linecache19-0.5.13.gem ruby-debug-base19-0.11.26.gem -- --with-ruby-include=$rvm_path/src/ruby-1.9.3-p0/
 
rm linecache19-0.5.13.gem ruby-debug-base19-0.11.26.gem
 
echo "Done."

Or you can do only this:

gem install linecache19 ruby-debug-base19 -- --with-ruby-include=$rvm_path/src/ruby-1.9.3-p0/

Without linecache19-0.5.13 and ruby-debug-base19-0.11.26 you can install. When you require 'ruby-debug':

ruby-1.9.3 irb> require 'ruby-debug'
LoadError: dlopen(/Users/rafaeldx7/.rvm/gems/ruby-1.9.3-p0/gems/ruby-debug-base19-0.11.25/lib/ruby_debug.bundle, 9): Symbol not found: _ruby_current_thread
  Referenced from: /Users/rafaeldx7/.rvm/gems/ruby-1.9.3-p0/gems/ruby-debug-base19-0.11.25/lib/ruby_debug.bundle
  Expected in: flat namespace
 in /Users/rafaeldx7/.rvm/gems/ruby-1.9.3-p0/gems/ruby-debug-base19-0.11.25/lib/ruby_debug.bundle - /Users/rafaeldx7/.rvm/gems/ruby-1.9.3-p0/gems/ruby-debug-base19-0.11.25/lib/ruby_debug.bundle
    from /Users/rafaeldx7/.rvm/rubies/ruby-1.9.3-p0/lib/ruby/site_ruby/1.9.1/rubygems/custom_require.rb:36:in `require'
    from /Users/rafaeldx7/.rvm/rubies/ruby-1.9.3-p0/lib/ruby/site_ruby/1.9.1/rubygems/custom_require.rb:36:in `require'
    from /Users/rafaeldx7/.rvm/gems/ruby-1.9.3-p0/gems/ruby-debug-base19-0.11.25/lib/ruby-debug-base.rb:1:in `<top (required)>'
    from /Users/rafaeldx7/.rvm/rubies/ruby-1.9.3-p0/lib/ruby/site_ruby/1.9.1/rubygems/custom_require.rb:36:in `require'
    from /Users/rafaeldx7/.rvm/rubies/ruby-1.9.3-p0/lib/ruby/site_ruby/1.9.1/rubygems/custom_require.rb:36:in `require'
    from /Users/rafaeldx7/.rvm/gems/ruby-1.9.3-p0/gems/ruby-debug19-0.11.6/cli/ruby-debug.rb:5:in `<top (required)>'
    from /Users/rafaeldx7/.rvm/rubies/ruby-1.9.3-p0/lib/ruby/site_ruby/1.9.1/rubygems/custom_require.rb:59:in `require'
    from /Users/rafaeldx7/.rvm/rubies/ruby-1.9.3-p0/lib/ruby/site_ruby/1.9.1/rubygems/custom_require.rb:59:in `rescue in require'
    from /Users/rafaeldx7/.rvm/rubies/ruby-1.9.3-p0/lib/ruby/site_ruby/1.9.1/rubygems/custom_require.rb:35:in `require'
    from (irb):1
    from /Users/rafaeldx7/.rvm/rubies/ruby-1.9.3-p0/bin/irb:16:in `<main>'

The one-liner you presented in the commented code did it for me! Finally I can use rdebug, thanks! I use Ubuntu 11.10 together with rvm.

Thank you man. I updated the post with your comment.

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