On 2026-06-28 08:33, Thomas Morley wrote:
To fix #6946 it would be sufficient to create only those Glissando
grobs really needed, then there would be no need to delete some of
them afterwards.
There seem to be some conditions for that purpose in the original
cc-engraver, but I don't understand them sufficiently.
Harm,
Issue #6946 seems to be a recurrence of issue #1639, which was fixed in
b8dfb88ca356cdde12cccb4cf57ecc64397c137b. That change defers grob
suicide until other engravers have had the opportunity to acknowledge
the end of the spanner.
Probably, the best response would be to update the Scheme implementation
of Glissando_engraver to defer grob suicide similarly. Since the issue
is a regression, the change would ideally be kept minimal so that it
could easily be back-ported to 2.26.
Secondarily, it might be helpful to make Spanner_break_forbid_engraver
more robust in the presence of dead grobs. I'll investigate this part.
--
Dan
