Re: Bug? Mismatched grace notes at beginning of staff cause extra clefs in other staffs

[shane]

At this point shouldn't it be called a feature?

Shane

Sent from my T-Mobile 4G LTE Device

-------- Original message --------

From: Thomas Morley <address@hidden>

Date: 3/10/18 7:57 PM (GMT-05:00)

To: Lucas Werkmeister <address@hidden>

Cc: lilypond-user <address@hidden>

Subject: Re: Bug? Mismatched grace notes at beginning of staff cause extra clefs in other staffs

2018-03-11 0:58 GMT+01:00 Lucas Werkmeister <address@hidden>:
> Hi everyone,
>
> I found what I suspect is a LilyPond bug, but I’m not sure yet :) minimal
> example:
>
> \version "2.18.2"
>
> <<
>   \new Staff { \grace c' c' }
>   \new Staff { \clef "bass" }
>>>
>
> Instead of beginning with a bass clef, the lower staff begins with a violin
> clef and then has a bass clef right after the time signature. If a different
> key signature is set (omitted in the above example for brevity), the
> accidentals are only printed after that extra clef as well, and the whole
> group (bass clef and accidentals) is shifted to the left so that it overlaps
> the time signature.
>
> This seems to happen when the two staves begin with different amounts of
> grace notes. A workaround is to add a silent grace note to the lower staff
> (\grace s) – just make sure that it’s the same duration as the real grace
> note in the upper staff: if it’s longer (e. g. a simple \grace s without
> explicit duration if the current duration is 4 and the duration of the other
> grace note is 8), then the upper staff will have the same problem instead
> (extra clef – same as the original one in this case – and accidentals only
> after that).
>
> Unfortunately, I’m unable to check if this still happens in the current
> development version of LilyPond since I’m getting an error when building
> from Git, but that’s for a different email :) perhaps someone else can check
> that, so I don’t open a bug report for something that’s already fixed? (Or
> perhaps it’s simply expected that grace notes should be aligned between
> staves? But that would surprise me.)
>
> Oh, and for the sake of people googling for this error – it also affects
> \acciaccatura, \appoggiatura and \slashedGrace.
>
> Cheers,
> Lucas


It's issue 34
https://sourceforge.net/p/testlilyissues/issues/34/
Likely our most infamous bug, not fixed.

The workaround you've found is mentioned in the docs ;)
Search for grace synchronization.

Cheers,
  Harm

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