On Sep 11, 2011, at 11:30 PM, [email protected] wrote:
> Status: Accepted
> Owner: ----
> Labels: Type-Critical
>
> New issue 1881 by [email protected]: Multiple cyclic dependency errors for
> Beam/Stem
> http://code.google.com/p/lilypond/issues/detail?id=1881
>
> Following commit 6465274e66a851cccd4cd32a521abc853f3e79dd, `Restores stem
> length and stem-begin-position.', even the simplest snippets with beaming
> spit out multiple cyclic dependency errors:
>
> \version "2.15.12"
>
> \relative c' {
> c8 d e f
> }
>
>
> /tmp/tmpcPppzK/document.ly:2:2: programming error: cyclic dependency:
> calculation-in-progress encountered for #'Y-extent (Stem)
>
> c8 d e f
> /tmp/tmpcPppzK/document.ly:2:2: continuing, cross fingers
>
>
> c8 d e f
> /tmp/tmpcPppzK/document.ly:2:2: programming error: cyclic dependency:
> calculation-in-progress encountered for #'quantized-positions (Beam)
>
> c8 d e f
> /tmp/tmpcPppzK/document.ly:2:2: continuing, cross fingers
>
>
> c8 d e f
> /tmp/tmpcPppzK/document.ly:2:2: programming error: cyclic dependency:
> calculation-in-progress encountered for #'quantized-positions (Beam)
>
> c8 d e f
> /tmp/tmpcPppzK/document.ly:2:2: continuing, cross fingers
>
>
> c8 d e f
> /tmp/tmpcPppzK/document.ly:2:2: programming error: cyclic dependency:
> calculation-in-progress encountered for #'quantized-positions (Beam)
>
> c8 d e f
> /tmp/tmpcPppzK/document.ly:2:2: continuing, cross fingers
>
>
> c8 d e f
>
> This is a serious problem for regression testing, since it obscures genuine
> changes.
>
Hey all,
I'm well on my way to getting a fix worked out for this. I think that the
problem only comes from lines that used the convention:
(void) me->get_property ("foo")
to trigger calculations if they hadn't happened yet. The values were actually
never used.
It may be useful to come up with a sort of "void_get_property" function that
triggers a callback without returning a property. It, in turn, would not throw
an error for cyclic dependencies. Thoughts?
Cheers,
MS
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