\partcombine error when Solo starts with a rest

[Urs Liska]

I've come across an error situation when using \partcombine:

\version "2.19.16"

c' {

c8 c c c c c c c

r8 c c c c c c c|

c c c c c c c c

c c c c c c c c

}

two = \relative c' {

c8 c c c c c c c

R1

R1

c8 c c c c c c c

}

\score {

\new Staff \partcombine \one \two

}

Here the second voice pauses in the second measure. LilyPond print (correctly) "Solo" but doesn't print the initial rest in voice \one.
If you replace the r8 in \one with a note everything is well.

Is this known, is there a workaround?

Best
Urs

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