Ruby Forum Rails Engines > Trouble setting up debugger (ruby-debug in Rails 2.0)

So I'm a newbie, trying to get better with the testing and debugging.
Upgraded to Rails 2.0 and decided to use the ruby-debug gem. Installed
gem successfully...

 >>gem install ruby-debug
   Successfully installed ruby-debug-0.10.0
   1 gem installed
   Installing ri documentation for ruby-debug-0.10.0...
   Installing RDoc documentation for ruby-debug-0.10.0...

but when I run my app with the -u (--debugger) switch get the following
message:

 >>script\server -u
   => Booting Mongrel (use 'script/server webrick' to force WEBrick)
   => Rails application starting on http://0.0.0.0:3000
   You need to install ruby-debug to run the server in debugging mode.
With gems, use 'gem install ruby-debug'

but as you can see, it is already installed?! Get same message when
trying to use WEBrick as well as Mongrel.

I am running Rails 2.0.2 and Ruby 1.8.6 on Windows XP (sorry). Tried
messing with a few versions of rubygems to fix this (0.9.4 and 0.9.5)
and am currently using 1.0.1.

Any help?

Thanks!

Martyn.

Hi Martyn,

The problem is that the error message is not clear. Here is a suggestion 
to modify base.rb to get a clearer message:

http://dev.rubyonrails.org/ticket/10593

In my case, the problem was made immediately clear with the above fix, 
showing:

#<Gem::LoadError: RubyGem version error: ruby-debug-base(0.9.3 not = 
0.10.0)>

I had version issues. ruby-debug was version 0.10.0 and ruby-debug-base 
was 0.9.3. Because I couldn't upgrade ruby-debug-base to 0.10.0, I 
downgraded ruby-debug to 0.9.3 with the following commands:

gem install ruby-debug -v 0.9.3
gem uninstall ruby-debug -v 0.10.0

and problem went away!

Hope this helps,

    Andres Montano
    http://www.gaugeus.com/ramblings

I not sure if this helps, but I was unable to gem install ruby-debug 
(0.10.0) on windows because it was trying to build a native extension. I 
posted the resolution at my blog at 
http://amitava1.blogspot.com/2008/02/gem-install-ruby-debug-fails-in-windows.html.

Amitava

Martyn Hill wrote:
> So I'm a newbie, trying to get better with the testing and debugging.
> Upgraded to Rails 2.0 and decided to use the ruby-debug gem. Installed
> gem successfully...
> 
>  >>gem install ruby-debug
>    Successfully installed ruby-debug-0.10.0
>    1 gem installed
>    Installing ri documentation for ruby-debug-0.10.0...
>    Installing RDoc documentation for ruby-debug-0.10.0...
> 
> but when I run my app with the -u (--debugger) switch get the following
> message:
> 
>  >>script\server -u
>    => Booting Mongrel (use 'script/server webrick' to force WEBrick)
>    => Rails application starting on http://0.0.0.0:3000
>    You need to install ruby-debug to run the server in debugging mode.
> With gems, use 'gem install ruby-debug'
> 
> but as you can see, it is already installed?! Get same message when
> trying to use WEBrick as well as Mongrel.
> 
> I am running Rails 2.0.2 and Ruby 1.8.6 on Windows XP (sorry). Tried
> messing with a few versions of rubygems to fix this (0.9.4 and 0.9.5)
> and am currently using 1.0.1.
> 
> Any help?
> 
> Thanks!
> 
> Martyn.