Strange warning - is this a bug?

[Steven Weber]

Lilypond 2.11.28, Windows XP

 

When I compile the following snippet, I get a  warning: barcheck failed at:
-3/4 (on the first c1 in part).  The pdf output is correct, and when I
generated a midi file, it sounded correct as well.  I've also tried
decorating the part section with all the \partial, \repeat, and \alternative
syntax, but still get the same warning.  Any idea what's going on here?

 

\version "2.11.28"

\paper { ragged-right = ##t }

global =

{

\time 4/4

\partial 4 s4 |

                \repeat volta 2 { s1 | }

                \alternative

                {

                                { \partial 4*3 s2. | }

                                { s1 | }

                }

}

part = \relative c''

{

                c4 |

                c1 |

                c2. |

                c1 |

}

\score

{

                \new Staff

                <<

                                \global

                                \part

                >>

}

 

--Steven