Re: [Lilypond-auto] Issue 2589 in lilypond: cyclic dependency when tempo, slur, and script present

[lilypond]

Comment #2 on issue 2589 by address@hidden: cyclic dependency when  
tempo, slur, and script present
http://code.google.com/p/lilypond/issues/detail?id=2589

Crazy stuff!

Check out:

\version "2.15.41"

\relative {
 %\tempo "foo"
 <e f>->-- ( <e f> )
}

With an unoptimized build, this triggers a programming error for  
control-points.  Now, remove the commented line.  No more error!  I  
remember seeing a problem like this a few months ago where the presence of  
a commented line had an impact downstream...I'm banking on some sort of  
uninitialized variable or memory problem.  I'll try to valgrind my way  
through it, but if you have any intuition about the cause, lemme know!