tupletSpannerDuration and percent repeat conflict

[Lenore Horner]

> I'm not top posting.

\version "2.14.2"
\paper{ ragged-right=##t }
\relative c'' {
                \set tupletSpannerDuration = #(ly:make-moment 1 4) \times 2/3 { 
                        \repeat percent 2 {g8 f g  f g f   g f g  f g f } 
                } \unset tupletSpannerDuration
}

Produces correct pdf output but also the following string of error messages 
(the full piece of music showed similar inconvenient lack of line numbers 
with the errors).

/Applications/LilyPond.app/Contents/Resources/bin/lilypond 
tuplet-repeatPercent-bug.ly; 
open tuplet-repeatPercent-bug.pdf
GNU LilyPond 2.14.2
Processing `tuplet-repeatPercent-bug.ly'
Parsing...
Interpreting music... 
programming error: stopped tuplet bracket has neither left nor right bound
continuing, cross fingers
programming error: stopped tuplet bracket has neither left nor right bound
continuing, cross fingers
programming error: stopped tuplet bracket has neither left nor right bound
continuing, cross fingers
programming error: stopped tuplet bracket has neither left nor right bound
continuing, cross fingers
Preprocessing graphical objects...
Finding the ideal number of pages...
Fitting music on 1 page...
Drawing systems...
Layout output to `tuplet-repeatPercent-bug.ps'...
Converting to `./tuplet-repeatPercent-bug.pdf'...
success: Compilation successfully completed


This 
\version "2.14.2"
\paper{ ragged-right=##t }
\relative c'' {
\repeat percent 2 {\set tupletSpannerDuration = #(ly:make-moment 1 4) 
\times 2/3 { 
g8 f g  f g f   g f g  f g f  
} \unset tupletSpannerDuration }
}

produces identical music but no error complaints, however in long passages of 
triplets it's a nuisance to have to stop and start the tupletSpannerDuration 
for chunks involving % repeats.

NOTE: I've had to wack things at 80-characters so some of the output isn't
completely accurate.