Extra leading repeat sign with leading rest and lyrics

[Todd Hesla]

> I'm not top posting.

% When processing a volta repeat containing a leading rest and lyrics,
% Lilypond 2.14.2 adds an extra leading repeat sign where the lyrics start
% (after the rest).

\version "2.14.2"

notes = \relative c' {
  c4 c c c |
  \repeat volta 2 { r c d e | f1 | }
}

words = \lyricmode {
  I want to sing.
  \repeat volta 2 { My dog has fleas. }
}

\score {
  \new Staff <<
    \new Voice = "solo" \notes
    \lyricsto "solo" \new Lyrics \words
  >>
}