Re: strange "make web" behaviour

[Han-Wen Nienhuys]

Joe Neeman schreef:

> OK, I have a snapshot of 1.8.0 working, but that doesn't help. It has
> something to do with the sorting of elements. As far as I can tell, this
> is what's happening:
>
> InstrumentName Piano's support contains
>   VerticalAxisGroup's elements contains
>     InstrumentName Right's support contains
>       VerticalAxisGroup (the same one!)
>
> So if we call Piano->get_offset, it calls VerticalAxisGroup->extent,
> which calls Right->get_offset, which calls VerticalAxisGroup->extent
> which is a calculation-in-progress, so we get any empty interval.
>
> If we call Right->get_offset _before_ we call Piano->get_offset,
> VerticalAxisGroup is not a calculation-in-progress, so we get the actual
> extent. That is, we get different answers depending on the order in
> which we call things.

OK, that's possible.  We do sort some arrays on pointer addresses.

> My workaround is not to add VerticalAxisGroups to the support of
> InstrumentNames. (ie comment out instrument-name-engraver.cc:76). This
> seems to work OK because the support still contains the various
> SystemStartXXX which are to the left of the staff anyway.

Good catch. Sounds good.


--

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

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