Issue 1213 in lilypond: Segmentation fault : extender triggers an infinite loop in Context::now_mom ()

[lilypond]

Status: Accepted
Owner: ----
Labels: Type-Defect

New issue 1213 by RalphBugList: Segmentation fault : extender triggers an  
infinite  loop in Context::now_mom  ()
http://code.google.com/p/lilypond/issues/detail?id=1213


\version "2.12.3"
<<
 \new Voice = melody { c4 c8 }
 \new Voice = tenorVerses { c2 }

 \context Lyrics = foo \lyricsto dummy {
   la
 }
 \context Lyrics = foo \lyricsto melody {
   la __
 }


The extender triggers an infinite loop in Context::now_mom (), since
the Voice it's associated with for the first Lyrics block rather
mysteriously has no parent context.

Several extender bugs were fixed in recent 2.13 releases, but I don't
think we can backport them since there's unlikely to be another 2.12
release.