lib/rack-cas/session_store/active_record.rb
def destroy_session(env, sid, options) # rack 1.x compatibilty
      delete_session(Rack::Request.new(env), sid, options)
    end
def destroy_session(env, sid, options) # rack 1.x compatibilty
      delete_session(Rack::Request.new(env), sid, options)
    end
Rack 1.* method