Rex error

# (R)?ex 0.46.0
# Started with
#   rex -E sww base
# the following config gives me:
#   [2014-05-16 15:55:03] INFO - Running task base on 1.2.3.4
#   [2014-05-16 15:55:03] INFO - Connecting to 1.2.3.4:22 (myuser)
#   [2014-05-16 15:55:04] INFO - Connected to 1.2.3.4, trying to authenticate.
#   [2014-05-16 15:55:09] INFO - Successfully authenticated on 1.2.3.4.
#   Deep recursion on subroutine "Rex::Interface::Exec::Sudo::exec" at /home/myself/perl5/perlbrew/perls/perl-5.14.3/lib/site_perl/5.14.3/Rex/Config.pm line 220, <> line 1.
#   Deep recursion on subroutine "Rex::Helper::Path::get_tmp_file" at /home/myself/perl5/perlbrew/perls/perl-5.14.3/lib/site_perl/5.14.3/Rex/Interface/Exec/Sudo.pm line 75, <> line 1.
#   Deep recursion on subroutine "Rex::Config::get_tmp_dir" at /home/myself/perl5/perlbrew/perls/perl-5.14.3/lib/site_perl/5.14.3/Rex/Helper/Path.pm line 89, <> line 1.

use Rex -feature => 0.46;

user "root";
private_key "/home/myself/.ssh/id_rsa";
public_key "/home/myself/.ssh/id_rsa.pub";
key_auth;

environment sww => sub {
    set ntp_server => '4.3.2.1';
    group "linux" =>
        Rex::Group::Entry::Server->new(
            name => '1.2.3.4', user => 'myuser', sudo => TRUE, sudo_password => 'myrootpwd'
        );
};

desc "Basis-Setup";
task "base", group => "linux", sub {
    update_package_db;
};