class RSpec::Core::Example

def assign_generated_description
  return unless RSpec.configuration.expecting_with_rspec?
  if metadata[:description_args].empty? and !pending?
    metadata[:description_args] << RSpec::Matchers.generated_description
  end
rescue Exception => e
  set_exception(e, "while assigning the example description")
ensure
  RSpec::Matchers.clear_generated_description
end