Stack level too deep with cucumber and rspec

When you get a "Stack level too deep" error, for all step definitions:

Feature: Create a customer
  So that a new customer can access his archive
  As a platform admin
  I want to be able to create a new customer

  Scenario: Create a customer                                   # features/platform_backend/create_a_customer.feature:7
    Given I am logged in                                        # features/platform_backend/step_definitions/create_a_customer_steps.rb:1
    When I create the customer John Doe Company                 # features/platform_backend/step_definitions/create_a_customer_steps.rb:8
      stack level too deep (SystemStackError)
      features/platform_backend/create_a_customer.feature:9:in `When I create the customer John Doe Company'
    Then I should see the John Doe Company in the customer list # features/platform_backend/step_definitions/create_a_customer_steps.rb:15

Failing Scenarios:
cucumber features/platform_backend/create_a_customer.feature:7 # Scenario: Create a customer

1 scenario (1 failed)
3 steps (1 failed, 1 skipped, 1 passed)

you have been bitten by a bug in rspec v2.5. You can solve this, by specifying a later version in your Rails.root/Gemfile:

group :test, :development do
  gem 'rspec', ">= 2.6.0.rc2"
  gem 'rspec-rails'