Issue 1884 in lilypond: Warnings from simultaneous slurs in partcombine

[lilypond]

Status: Accepted
Owner: ----
Labels: Type-Critical

New issue 1884 by address@hidden: Warnings from simultaneous slurs  
in partcombine
http://code.google.com/p/lilypond/issues/detail?id=1884

Reported by Jean-Baptiste Mazon:
"LilyPond 2.14.2 logs warnings when presented with simultaneous slurs.

    $ cat partcombine.ly
    \version "2.14.2"
    \partcombine { g'( a') } { e'( f') }
    $ lilypond partcombine.ly
    GNU LilyPond 2.14.2
    Processing `partcombine.ly'
  [...]
    partcombine.ly:2:17: warning: already have slur
    \partcombine { g'
                     ( a') } { e'( f') }
    partcombine.ly:2:33: warning: cannot end slur
    \partcombine { g'( a') } { e'( f'
                                     ) }
  [...]
    success: Compilation successfully completed

Such warnings were not logged in 2.12.3 and 2.14.1.  The result sheet  
appears to
be the same in all cases.

Discovered with the bundled LilyPond packages from:
  - Ubuntu 11.10 (2.12.3)
  - Cygwin       (2.14.1)
  - Arch Linux   (2.14.2)
"

Also occurs as reported with 2.15.10 and no errors occur with 2.13.63
This is a regression between 2.13 and 2.14 so I'm calling it type-critical,  
although
the problem is ambiguous error messages, not the actual output.