Question

I have just upgrade to ruby on rails 3.0.9 from using rails 2.X.
I have been writing feature tests in cucumber and used the capybara-firebug gem and specifically the included step stop and let me debug frequently to debug.

However after the update I keep getting a error saying:

When stop and let me debug          # capybara-firebug-1.2.3/lib/capybara/firebug.rb:52
  cannot load such file -- ruby-debug (LoadError)

My research sofar has led me to that the problem has to do with ruby-debug gem that does not work with ruby 1.9.3 wich I am currently using.

I tried an alternative, debugger but now I am stuck with a problem when running tests, EVEN after uninstalling debugger as I read that ruby-debug19 should be a better alternative.

This is the error I get now when running tests:

uninitialized constant Debugger::LocalInterface::Readline (NameError)

How do I get rid of that and get the debug to work properly again?

Answer 1

Not sure if you’re using rvm or not. But I think you’re possibly missing a gem. If using rvm, confirm that readline is installed:

% rvm pkg install readline

Next confirm that ruby-debug19 is installed correctly:

% gem install ruby-debug19
% gem install linecache19
% gem install ruby-debug-base19

SOURCE: this SO question/answer: debug rails 3.1.1 application