facter bug?

(root@deimos) 66 ~ # find /etc/puppetlabs/ /opt/puppetlabs/ -name vgp\*
/opt/puppetlabs/puppet/cache/lib/facter/vgp_needs_restart.rb
(root@deimos) 67 ~ # cat /opt/puppetlabs/puppet/cache/lib/facter/vgp_needs_restart.rb
# Tell Puppet whether this file already exists on the client.

Facter.add("vgp_needs_restart") do
  setcode do
    File.exist?("/etc/voalte/restart_vgp.flag")
  end
end

(root@deimos) 68 ~ # facter -p vgp_needs_restart
false
(root@deimos) 69 ~ # facter -jp vgp_needs_restart
{
  "vgp_needs_restart": true
}
(root@deimos) 70 ~ # facter --version
3.2.0 (commit 148948d795fbdcf6bcf51ed36a73f496775835dc)