Re: Figured-Bass Bug Lilypond 2.9.18 on Windows

[Han-Wen Nienhuys]

Trent Johnston wrote:
> Hi,
>
> The figured bass bug I sent earlier on with version 2.9.17 remains the 
> same in 2.9.18.
>
> Since I was the sponsor of this feature it would be good if it worked 
> how I had originally commissioned it.
>
> Figures were able to placed above rests but in recent versions these are 
> now ignored. The figured is excepted (ie. lilypond doesn't complain) but 
> there is no figure printed in the output.
>
> I've done some detective work and downloaded again each of the previous 
> lilypond versions before 2.9.18. The last lilypond version that the 
> figured bass work properly was 2.9.13. In version 2.9.14 the figured 
> bass was not working at all. I sent a message to Lilypond User about 
> this version which Mats then forwarded this onto Lilypond Bugs 
> (http://lists.gnu.org/archive/html/bug-lilypond/2006-08/msg00044.html). 
> Version 2.9.15 the figured bass was working again except that figures 
> above a rest were ignored.
>
> I hope this helps in tracking down the bug. I have several instrumental 
> scores that I would like to now finish and print but can't until this 
> issue is solved.

Hi,

I think the problem is that due to Erik's stream changes in 
2.9.something, now both Rest_engraver and Figured_bass_engraver listen 
to rest-events. The old behavior of \context FiguredBass was to cancel 
any running bassfigure (continuation line) when a rest was encountered.

When adding the bass figures to the Staff, rests would be caught by the 
normal Rest_engraver. Now both the rest_engraver and the 
figured_bass_engraver catch the rest-event. I could switch off the 
'terminate  continuation on rest' feature, but that would have other 
compatibility repercussions.

Erik, please advise on a strategy.

--

Han-Wen Nienhuys - address@hidden - http://www.xs4all.nl/~hanwen

LilyPond Software Design
 -- Code for Music Notation
http://www.lilypond-design.com