Re: [RFC] Automatic 'make check' in CI

[Jonas Hahnfeld]

Am Sonntag, den 22.11.2020, 09:56 -0500 schrieb Dan Eble:
> On Nov 22, 2020, at 07:55, Jonas Hahnfeld <hahnjo@hahnjo.de> wrote:
> > 
> > 
> > I successfully traced this back to compiling, for example, footnote-
> > volta-spanner.ly and skyline-point-extent.ly (in that order!) with an
> > added '\include "lilypond-book-preamble.ly"' (attached). If I run
> > $ ./out/bin/lilypond footnote-volta-spanner.ly skyline-point-extent.ly
> > the skyline-point-extent.pdf has some added whitespace that vanishes
> > when passing -djob-count=1 or 2 (starting with 3, it won't fork because
> > there are less input files than jobs).
> 
> I have to run right now, but I would look for things related to
> garbage collection: does forcing GC at some point make the behavior
> reproducible?  Are there missing mark calls in the new code?

After hours of looking at the wrong code, I realized that the list of
input files is reversed when job-count is set (due to how split-list
works). So when swapping the two arguments to make footnote-volta-
spanner.ly compiled first, I reproducibly get the added whitespace in
skyline-point-extent.ly. I guess this rules out garbage collection as a
suspect.

Jonas

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