Exception: can't dup Symbol

Hey everybody, I’m trying to test a little piece of code I wrote, and I get the following error: Exception: can’t dup Symbol It happens in the following line: try_to_login @valid_user, :remember_me => “1”, where the function try_to_login is: def try_to_login(user, options = {}) user_hash = {:screen_name => user.screen_name, :password => user.password} user_hash.merge!(options) post :login, :user =