[Lilypond-auto] Issue 2584 in lilypond: parcombine misplaces slurs

[lilypond]

Status: Accepted
Owner: ----
Labels: Type-Ugly Regression
New issue 2584 by k-ohara5...@oco.net: parcombine misplaces slurs
http://code.google.com/p/lilypond/issues/detail?id=2584

Version 2.14 would warn about trying to start two slurs on the first beat,  
but combined the slurs correctly.  Version 2.15.39 starts two slurs and  
lets one continue too long.  Reverting the fix for issue 1967 restores  
correct behavior.

I don't know if version 2.14 combined the slurs intentionally, or just  
accidentally.

\version "2.15.39"
\partcombine
  {e'2( f'4 g') g'2( f')}
  {c'2( f'4 g') e'2( d')}

% Workarounds:
% Prevent the part-combiner from switching states during the slur
\partcombine
  {\partcombineChords e'2( f'4 g') \partcombineAutomatic g'2( f')}
  {c'2( f'4 g') e'2( d')}

% Use phrasing slurs
\partcombine
{e'2\( f'4 g'\) g'2\( f'\)}
{c'2\( f'4 g'\) e'2\( d'\)}