uniform-stretching results in too much space after barline

[Janek Warchoł]

Hi all,

i have a piano-vocal piece with badly spaced triplets (see attached
png).  When i turn uniform-stretching on, the triplets are fixed, but
there is a serious problem with space after barline (in the real score
it looks much more ugly than in the example below).
I've looked at the spacing code that uses uniform-stretching, and also
tried changing BarLine's spacing alist, but didn't find any solution.
Ideas?

\version "2.15.36"   % 2.14.2 has the same problem

\markup "uniform-stretching results in too much space after barline"
\score {
  { \repeat unfold 16 { \times 2/3 { gis'8 a' b' } } }
  \layout {
    indent = 0
    system-count = #2
    \context {
      \Score
      \override SpacingSpanner #'uniform-stretching = ##t
    }
  }
}

\markup "For comparison, here's the same fragment without uniform-stretching"
\score {
  { \repeat unfold 16 { \times 2/3 { gis'8 a' b' } } }
  \layout {
    indent = 0
    system-count = #2
  }
}

% cheers,
% Janek

bad triplet.png
Description: PNG image

uniform-stretching problem.pdf
Description: Adobe PDF document