Error on start when using Spork and Guard

Here's the problem. When added the Guard gem everything was fine when I was calling Guard. When I added Spork, I get the following error that doesn't affect testing my tests but it brings it up every time I try to restart Guard.

19:01:28 - INFO - Guard uses TerminalTitle to send notifications.
19:01:28 - INFO - Starting Spork for RSpec
19:01:28 - ERROR - Guard::Spork failed to achieve its <start>, exception was:

[#5232DAD6505A] ChildProcess::LaunchError: No such file or directory - bundle exec spork -p 8989 [#5232DAD6505A] /Users/periclestheodorou/.rvm/gems/ruby-1.9.3-p362/gems/childprocess-0.3.7/lib/childprocess/unix/fork_exec_process.rb:54:in launch_process' [#5232DAD6505A] /Users/periclestheodorou/.rvm/gems/ruby-1.9.3-p362/gems/childprocess-0.3.7/lib/childprocess/abstract_process.rb:68:instart' [#5232DAD6505A] /Users/periclestheodorou/.rvm/gems/ruby-1.9.3-p362/gems/guard-spork-1.2.0/lib/guard/spork/spork_instance.rb:38:in start' [#5232DAD6505A] /Users/periclestheodorou/.rvm/gems/ruby-1.9.3-p362/gems/guard-spork-1.2.0/lib/guard/spork/runner.rb:33:ineach' [#5232DAD6505A] /Users/periclestheodorou/.rvm/gems/ruby-1.9.3-p362/gems/guard-spork-1.2.0/lib/guard/spork/runner.rb:33:in launch_sporks' [#5232DAD6505A] /Users/periclestheodorou/.rvm/gems/ruby-1.9.3-p362/gems/guard-spork-1.2.0/lib/guard/spork.rb:21:instart' [#5232DAD6505A] /Users/periclestheodorou/.rvm/gems/ruby-1.9.3-p362/gems/guard-1.6.2/lib/guard/runner.rb:99:in block in run_supervised_task' [#5232DAD6505A] /Users/periclestheodorou/.rvm/gems/ruby-1.9.3-p362/gems/guard-1.6.2/lib/guard/runner.rb:97:incatch' [#5232DAD6505A] /Users/periclestheodorou/.rvm/gems/ruby-1.9.3-p362/gems/guard-1.6.2/lib/guard/runner.rb:97:in run_supervised_task' [#5232DAD6505A] /Users/periclestheodorou/.rvm/gems/ruby-1.9.3-p362/gems/guard-1.6.2/lib/guard/runner.rb:54:inblock (2 levels) in run' [#5232DAD6505A] /Users/periclestheodorou/.rvm/gems/ruby-1.9.3-p362/gems/guard-1.6.2/lib/guard/runner.rb:175:in block (3 levels) in scoped_guards' [#5232DAD6505A] /Users/periclestheodorou/.rvm/gems/ruby-1.9.3-p362/gems/guard-1.6.2/lib/guard/runner.rb:174:ineach' [#5232DAD6505A] /Users/periclestheodorou/.rvm/gems/ruby-1.9.3-p362/gems/guard-1.6.2/lib/guard/runner.rb:174:in block (2 levels) in scoped_guards' [#5232DAD6505A] /Users/periclestheodorou/.rvm/gems/ruby-1.9.3-p362/gems/guard-1.6.2/lib/guard/runner.rb:173:incatch' [#5232DAD6505A] /Users/periclestheodorou/.rvm/gems/ruby-1.9.3-p362/gems/guard-1.6.2/lib/guard/runner.rb:173:in block in scoped_guards' [#5232DAD6505A] /Users/periclestheodorou/.rvm/gems/ruby-1.9.3-p362/gems/guard-1.6.2/lib/guard/runner.rb:172:ineach' [#5232DAD6505A] /Users/periclestheodorou/.rvm/gems/ruby-1.9.3-p362/gems/guard-1.6.2/lib/guard/runner.rb:172:in scoped_guards' [#5232DAD6505A] /Users/periclestheodorou/.rvm/gems/ruby-1.9.3-p362/gems/guard-1.6.2/lib/guard/runner.rb:53:inblock in run' [#5232DAD6505A] /Users/periclestheodorou/.rvm/gems/ruby-1.9.3-p362/gems/lumberjack-1.0.2/lib/lumberjack.rb:27:in unit_of_work' [#5232DAD6505A] /Users/periclestheodorou/.rvm/gems/ruby-1.9.3-p362/gems/guard-1.6.2/lib/guard/runner.rb:52:inrun' [#5232DAD6505A] /Users/periclestheodorou/.rvm/gems/ruby-1.9.3-p362/gems/guard-1.6.2/lib/guard.rb:187:in block in start' [#5232DAD6505A] /Users/periclestheodorou/.rvm/gems/ruby-1.9.3-p362/gems/guard-1.6.2/lib/guard.rb:363:inblock in within_preserved_state' [#5232DAD6505A] :10:in synchronize' [#5232DAD6505A] /Users/periclestheodorou/.rvm/gems/ruby-1.9.3-p362/gems/guard-1.6.2/lib/guard.rb:360:inwithin_preserved_state' [#5232DAD6505A] /Users/periclestheodorou/.rvm/gems/ruby-1.9.3-p362/gems/guard-1.6.2/lib/guard.rb:185:in start' [#5232DAD6505A] /Users/periclestheodorou/.rvm/gems/ruby-1.9.3-p362/gems/guard-1.6.2/lib/guard/cli.rb:110:instart' [#5232DAD6505A] /Users/periclestheodorou/.rvm/gems/ruby-1.9.3-p362/gems/thor-0.17.0/lib/thor/task.rb:27:in run' [#5232DAD6505A] /Users/periclestheodorou/.rvm/gems/ruby-1.9.3-p362/gems/thor-0.17.0/lib/thor/invocation.rb:120:ininvoke_task' [#5232DAD6505A] /Users/periclestheodorou/.rvm/gems/ruby-1.9.3-p362/gems/thor-0.17.0/lib/thor.rb:344:in dispatch' [#5232DAD6505A] /Users/periclestheodorou/.rvm/gems/ruby-1.9.3-p362/gems/thor-0.17.0/lib/thor/base.rb:434:instart' [#5232DAD6505A] /Users/periclestheodorou/.rvm/gems/ruby-1.9.3-p362/gems/guard-1.6.2/bin/guard:6:in <top (required)>' [#5232DAD6505A] /Users/periclestheodorou/.rvm/gems/ruby-1.9.3-p362/bin/guard:19:inload' [#5232DAD6505A] /Users/periclestheodorou/.rvm/gems/ruby-1.9.3-p362/bin/guard:19:in <main>' [#5232DAD6505A] /Users/periclestheodorou/.rvm/gems/ruby-1.9.3-p362/bin/ruby_noexec_wrapper:14:ineval' [#5232DAD6505A] /Users/periclestheodorou/.rvm/gems/ruby-1.9.3-p362/bin/ruby_noexec_wrapper:14:in `' 19:01:28 - INFO - Guard::Spork has just been fired 19:01:28 - INFO - Guard::RSpec is running, with RSpec 2! 19:01:28 - INFO - Running all specs No DRb server is running. Running in local process instead ... No examples found.

Finished in 0.0001 seconds 0 examples, 0 failures

Here's the Gemfile

source 'https://rubygems.org'

gem 'rails', '3.2.11'

group :development, :test do
  gem 'sqlite3', '1.3.5'
  gem 'rspec-rails', '2.11.0'
  gem 'guard-rspec', '1.2.1'
  gem 'guard-spork', '1.2.0'
  gem 'spork', '0.9.2'
end

group :assets do
  gem 'sass-rails', '3.2.5'
  gem 'coffee-rails', '3.2.2'
  gem 'uglifier', '1.2.3'
end

gem 'jquery-rails'

group :test do
  gem 'capybara', '1.1.2'
  gem 'rb-fsevent', '0.9.1', :require => false
end

group :production do
  gem 'pg', '0.12.2'
end

spec_helper

require 'rubygems'
require 'spork'

Spork.prefork do
  # Loading more in this block will cause your tests to run faster. However, 
  # if you change any configuration or code from libraries loaded here, you'll
  # need to restart spork for it take effect.
  # This file is copied to spec/ when you run 'rails generate rspec:install'
  ENV["RAILS_ENV"] ||= 'test'
  require File.expand_path("../../config/environment", __FILE__)
  require 'rspec/rails'
  require 'rspec/autorun'

  # Requires supporting ruby files with custom matchers and macros, etc,
  # in spec/support/ and its subdirectories.
  Dir[Rails.root.join("spec/support/**/*.rb")].each {|f| require f}

  RSpec.configure do |config|
    # == Mock Framework
    #
    # If you prefer to use mocha, flexmock or RR, uncomment the appropriate line:
    #
    # config.mock_with :mocha
    # config.mock_with :flexmock
    # config.mock_with :rr
    config.mock_with :rspec

    # Remove this line if you're not using ActiveRecord or ActiveRecord fixtures
    config.fixture_path = "#{::Rails.root}/spec/fixtures"

    # If you're not using ActiveRecord, or you'd prefer not to run each of your
    # examples within a transaction, remove the following line or assign false
    # instead of true.
    config.use_transactional_fixtures = true

    # If true, the base class of anonymous controllers will be inferred
    # automatically. This will be the default behavior in future versions of
    # rspec-rails.
    config.infer_base_class_for_anonymous_controllers = false
  end
end

Spork.each_run do
  # This code will be run each time you run your specs.

end

Solution

That’s a known issue in guard-spork and you can either use the previous version of ChildProcess by adding:

gem 'childprocess', '0.3.6'

To your Gemfile or try the guard-spork master branch, which has fixed the issue by adding the following to your Gemfile:

gem 'guard-spork', :github => 'guard/guard-spork'