full measure rest with odd time counter

[Helge Kruse]

Hello,

I typeset a song in (4+5)/8 time signature. One staff starts with full 
measure rests:

\version "2.16.0"

\relative c'' {
  \compoundMeter #'((4 5 8))
  R1 R8 |
  R1 R8 |
  r1 c8 |

}


The Lilypond output looks good. But why does I get a "barcheck failed 
at: 1" for the first measure? Can I suppress the warning by improvement 
of my input?

Regards
Helge