Comment #5 on issue 2990 by [email protected]: \RemoveEmptyStaves in StaffGroup
context crashes
http://code.google.com/p/lilypond/issues/detail?id=2990
This all seems rather hare-brained. The problem appears to be that
VerticalAxisGroup, when coming into being, use bad rules for adding stuff
to its element list, rules that do not correspond to the actual hierarchy
of contexts containing the VerticalAxisGroup. Your check appears
grotesquely expensive (O(n^3) or something). We get a crash also for
\new StaffGroup \with { \consists "Axis_group_engraver" } \new Staff { c }
which is just not rational for me. What are the rules for axis groups?
What is their purpose in connection with nested contexts? What does it
mean to include an Axis_group_engraver? If we have a reasonable answer for
that, we should be able to come up with creation rules that don't explode
around our ears without discernible reason.
