inline partials and warnings

[Alberto Simões]

Hello

Some time ago, in this list, we discussed about partial inlines (that 
were supported back ago with '\partial') and the result was this macro 
that was very useful:

  partialInline = #(define-music-function
     (parser location nom den mus)
     (integer? integer? ly:music?)
  #{
    \set Score.measurePosition = #(ly:make-moment (- $nom) $den)
    $mus
   #}
  )

I use is as   \partialInline #3 #8 { a8 a a }

Until now I managed to use it properly, but today I have a sctb that is 
making me crazy :)

All the voices have the same structure:

        \time 6/8
        \partial 8  a8 a a | ... |
                    a4 a8 \repeat volta 2 { a4 a8 | ... | }
                    \alternative {
                       { a4 a8 a4 a8 | \partialInline #3 #8 { a4. } }
                       { a4 a8 a4 a8 | a4. }
                    }

where |...| are proper 6/8 measures.

While the first voice (S) doesn't complain, I get for the others
    sctb.ly:52:18: warning: barcheck failed at: -3/8
in the bar exactly before the partialInline.

I tried to add
    \set Timing.measurePosition = #(ly:make-moment 0 8)
before all the partials, but I get the sabe behavior.

Any hint?
thank you,
alberto

PS: in attach the full file (it is not that big).

sctb.ly
Description: Text document