Bug in hyphen spanner

[Carsten Block]

Hello,
I think there is a bug with lyric hyphen spanner. Processing
input/test/lyric-hyphen.ly produces this output:

GNU LilyPond 1.3.102.
Now processing: `lyric-hyphen.ly'
Parsing...
Interpreting music...
lyric-hyphen.ly:4:53: warning: Nothing to connect hyphen to on the left.  
Ignoring hyphen request.:
        \context Lyrics \context LyricVoice \lyrics { bla --
                                                             alb xxx -- yyy }

lyric-hyphen.ly:4:64: warning: Nothing to connect hyphen to on the left.  
Ignoring hyphen request.:
        \context Lyrics \context LyricVoice \lyrics { bla -- alb xxx --
                                                                        yyy }
[2]
Preprocessing elements... 
Calculating column positions... [2]
paper output to lyric-hyphen.tex...

In the output there are no hyphens present.

Greetings 
Carsten