list_repo_issue_events returns MissingFieldError("public")

[grahamc]

    let gh = github::client::Client::new("myuseragent");
    let events = github::activity::events::list_repo_issue_events(&gh,
                                                                 "NixOS",
                                                                 "nixpkgs");
    println!("{:?}", events);

outputs:

Err(Internal(InternalError { msg: "MissingFieldError(\"public\")" }))