On Thu, 22 Sep 2016 18:10:44 +0200
Dominik 'Rathann' Mierzejewski <domi...@greysector.net> wrote:
> On Thursday, 22 September 2016 at 16:55, Dan Horák wrote:
> > On Thu, 22 Sep 2016 15:41:01 +0200
> > Dominik 'Rathann' Mierzejewski <domi...@greysector.net> wrote:
> >
> > > Hello,
> > > I've just pushed (but not built) python-matplotlib-2.0.0b4 to
> > > rawhide. I'll be attempting to rebuild all the affected packages
> > > locally to test if they're compatible. In the meantime, feel free
> > > to git pull and build locally for your own testing.
> >
> > python-matplotlib has been a pain for alternative arches recently,
> > due failures in the test-suite (in 1.5.x). Is the 2.0 version going
> > to be better in this regard?
>
> tldr: no, but upstream is aware and working on it.
>
> There are quite a few issues opened on upstream github tracker either
> by me or by Debian maintainer. The main problem is that upstream
> checks that rendering output matches their generated images. This
> changes slightly with different versions of freetype. As a
> workaround, I reintroduced a certain base tolerance in order not to
> add specific tolerance value to each failing test (there are ~900
> failing due to slight rendering differences). Then, there are some
> arch-specific issues, mainly on ARM.
Could we disable the test-suite for alternative arches until there is
proper upstream fix? Quite a number of packages/builds are blocked on
python-matplotlib currently.
For math precision issues -ffp-contract=off often helps. And yes,
comparing rendered output can be considered fragile, we have already
met it ...
Dan
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