# Debugging a Rails 3 app with RadRails 2?

**URL:** <https://www.ruby-forum.com/t/debugging-a-rails-3-app-with-radrails-2/190440>\
**Category:** Rails\
**Created:** [June 20, 2010, 2:14pm UTC](https://www.ruby-forum.com/t/debugging-a-rails-3-app-with-radrails-2/190440 "2010-06-20T14:14:11Z")\
**Posts on this page:** 1\
**Page:** 1

<div class="post-metadata">

**Author:** ![wickie](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/w/ba9def/32.png) [@wickie](https://www.ruby-forum.com/u/wickie)\
**Post date:** [June 20, 2010, 2:14pm UTC](https://www.ruby-forum.com/t/debugging-a-rails-3-app-with-radrails-2/190440/1 "2010-06-20T14:14:11Z")

</div>

When trying to debug a Rails 3 app with RadRails 2.0.4, I’m running into  
a problem with gem loading, apparently. See below for a stack trace.  
That problem disappears, when I move Gemfile out of the way, but, of  
course, then other necessary gems aren’t loaded.

From my Debug Configuration

Project:   
File: script/rails  
Working Directory: /home/michael/aptana/  
Interpreter Arguments: -e STDOUT.sync=true -e STDERR.sync=true -e  
load(ARGV.shift)  
Programm Arguments: server --debugger --environment=development –  
port=3000  
Interpreter: standard /usr/bin/ruby

I’ve tried adding/removing ruby-debug and ruby-debug-ide to the Gemfile  
in any order and at the top-level as well as in the :development group.

I think, but are far from sure, that RadRails and Bundler are of devided  
minds as to which gems are active when. First, RadRails directly runs  
rdebug-ide, which runs script/rails which causes bundler to mangle which  
gems are active. In the file, where the error occurs, there’s a

require ‘ruby-debug/processor’

and that succeeds. But possibly it loads the wrong file, i.e. not the  
one from ruby-debug, but the one from ruby-debug-ide. The later does  
indeed not define Debugger::CommandProcessor. (I’m using Ruby 1.8.7 and  
this might matter here.)

I’ve tried my luck with the latest beta of Aptana Studio 3 as well, but  
that wasn’t a pleasant experience, either.

I’m hoping someone has an idea how to get around this problem. I’m also  
taking suggestions for other Linux-based(!) IDEs with suitable debugging  
abilities ☹

Michael

Fast Debugger (ruby-debug-ide 0.4.9) listens on :2984  
/var/lib/gems/1.8/gems/ruby-debug-0.10.3/cli/ruby-debug.rb:9  
/var/lib/gems/1.8/gems/bundler-0.9.26/lib/bundler/runtime.rb:46:in  
`require' /var/lib/gems/1.8/gems/bundler-0.9.26/lib/bundler/runtime.rb:46:in `require’  
/var/lib/gems/1.8/gems/bundler-0.9.26/lib/bundler/runtime.rb:41:in  
`each' /var/lib/gems/1.8/gems/bundler-0.9.26/lib/bundler/runtime.rb:41:in `require’  
/var/lib/gems/1.8/gems/bundler-0.9.26/lib/bundler/runtime.rb:40:in  
`each' /var/lib/gems/1.8/gems/bundler-0.9.26/lib/bundler/runtime.rb:40:in `require’  
/var/lib/gems/1.8/gems/bundler-0.9.26/lib/bundler.rb:89:in `require’  
/home/michael/workspace/ue\_guidelines/config/application.rb:7

/var/lib/gems/1.8/gems/railties-3.0.0.beta4/lib/rails/commands.rb:28:in  
`require’  
/var/lib/gems/1.8/gems/railties-3.0.0.beta4/lib/rails/commands.rb:28

/var/lib/gems/1.8/gems/railties-3.0.0.beta4/lib/rails/commands.rb:27:in  
`tap' /var/lib/gems/1.8/gems/railties-3.0.0.beta4/lib/rails/commands.rb:27 ./script/rails:6:in `require’  
./script/rails:6  
/var/lib/gems/1.8/gems/ruby-debug-ide-0.4.9/lib/ruby-debug-  
ide.rb:109:in `debug_load' /var/lib/gems/1.8/gems/ruby-debug-ide-0.4.9/lib/ruby-debug- ide.rb:109:in `debug\_program’  
/var/lib/gems/1.8/gems/ruby-debug-ide-0.4.9/bin/rdebug-ide:87  
/var/lib/gems/1.8/bin/rdebug-ide:19:in `load' /var/lib/gems/1.8/bin/rdebug-ide:19 -e:3:in `load’  
-e:3  
Uncaught exception: uninitialized constant Debugger::CommandProcessor

–  
Michael S.  
[mailto:removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid)  
[http://www.schuerig.de/michael/](http://www.schuerig.de/michael/)