Mysterious error message

[to7m]

> I'm not top posting.
> (to the best of my knowledge)

The error message:
  programming error: Improbable offset for stencil: inf staff space
  Setting to zero.
  continuing, cross fingers

Could someone please explain this error message to me? The snippet is
reduction of a much bigger file ( http://pastebin.com/v1RzaezH ).


\version "2.18.2"

\score {
  <<
    \new Dynamics { \override Score.BarLine.stencil = ##f R1 R }
    \new Staff R
  >>
  \layout { \context { \Staff \remove "Time_signature_engraver" } }
}


Thanks,
Tom