When you require the Ruby debugger to be available from your Rails console (e.g. you want to inspect a method's magic), you need to enable it explicitly:
script/console --debugger
If you cannot access local variables etc, see this card.
WEBrick
For WEBrick, enable it similarly:
script/server --debugger
Posted by Arne Hartherz to makandra dev (2011-10-07 18:03)