/updategroup is returning both an error object and group object separated by a newline when I get an invalid_value error, which means the http response can't be parsed as json (without first parsing/splitting newlines. Is this intentional, or is there a missing return statement somewhere?

In my case, I had accidentally passed "polls_access=group_access_none" (which is the "disable" value the other features use, but polls uses "polls_access_none").