Question

Possible Duplicate:
ruby-debug with Ruby 1.9.3?

I had heard rumors that ruby 1.9.3p125 has a solution for the ruby-debug19 problem, so per instructions on the RVM site, I reinstalled 1.9.3:

$ rvm reinstall 1.9.3 --patch debug --force-autoconf
$ ruby -v
  ruby 1.9.3p125 (2012-02-16 revision 34643) [x86_64-darwin11.2.0]

Then:

gem install ruby-debug19

Added this entry to my Gemfile:

gem 'ruby-debug19'

Then:

$ rails server -u         
=> Booting WEBrick
=> Rails 3.1.3 application starting in development on http://0.0.0.0:3000
=> Call with -d to detach
=> Ctrl-C to shutdown server
You need to install ruby-debug to run the server in debugging mode. With gems, use 'gem install ruby-debug'
Exiting

To get past this error I changed my Gemfile entry to:

gem 'ruby-debug19', :require => 'ruby-debug'

Now a new error from the server:

/Users/don/.rvm/gems/ruby-1.9.3-p125/gems/activesupport-3.1.3/lib/active_support/dependencies.rb:240:in `require': dlopen(/Users/don/.rvm/gems/ruby-1.9.3-p125/gems/ruby-debug-base19-0.11.25/lib/ruby_debug.bundle, 9): Symbol not found: _ruby_threadptr_data_type (LoadError)
  Referenced from: /Users/don/.rvm/gems/ruby-1.9.3-p125/gems/ruby-debug-base19-0.11.25/lib/ruby_debug.bundle
  Expected in: flat namespace
 in /Users/don/.rvm/gems/ruby-1.9.3-p125/gems/ruby-debug-base19-0.11.25/lib/ruby_debug.bundle - /Users/don/.rvm/gems/ruby-1.9.3-p125/gems/ruby-debug-base19-0.11.25/lib/ruby_debug.bundle

I’m very confused by the hundreds of posts out there on how to handle this ruby-debug19 issue. I was hoping it had been solved. Apparently not. Any suggestions? (If anyone suggests a patch, please provide step by step instructions on how to apply it. I’ve struggled with patches in the past.)

Answer 1

A fork of ruby-debug just called ‘debugger’ now exists that incorporates many of the fixes people had been deploying on top of ruby-debug19, so you should be able to just change your Gemfile to

gem 'debugger'

… and off you go.