Re: [Lilypond-auto] Issue 2990 in lilypond: \RemoveEmptyStaves in StaffGroup context crashes

[lilypond]

Comment #6 on issue 2990 by address@hidden: \RemoveEmptyStaves in  
StaffGroup context crashes
http://code.google.com/p/lilypond/issues/detail?id=2990

When you say "contexts containing", I'm assuming you mean "contexts  
creating."  A VerticalAxisGroup represents a line of music on the page.   
Think of it like a PaperColumn rotated 90 degrees.  As such, the only  
contexts that ever create them should be ones that govern the creation of a  
line of music on the page (Staff, Dynamics, Lyrics, DrumStaff, TabStaff,  
etc.). Including an Axis_group_engraver means that you want to create a one  
and only one VerticalAxisGroup in a context and no VerticalAxisGroup in  
inferior or superior contexts on the tree.