I noticed there is no bug in sage 7.4 (sagenb.org).
Pynac was updated to 0.2.2 (sage-4.7.1.alpha1) and then to 0.2.3
(sage-4.7.1.alpha4) according to sage 7.4.1 changelog.
Where do I fill the bug?
I've already filled a bug at the "Sage Notebook Bugreport", is it
enough?
Is it mandatory to ask for a Tracker account?
On Oct 11, 5:02 pm, Nils Bruin <nbr...@sfu.ca> wrote:
> On Oct 11, 4:16 am, CDSousa <cris...@gmail.com> wrote:
>
> > x = var('x'); f = function('f',x) ; s = dumps(f) ; loads(s)
> > I get a "RuntimeError: unknown function 'f' in archive".
>
> Excellent example. That's definitely a bug. You must be the first
> person who tries to pickle a formal function (i.e., one without a
> defining expression). You should file a bug report with exactly this
> example in there.
>
> Some technical information from
> sage.misc.explain_pickle.explain_pickle:
> (indeed, pickle is not an opaque binary format when looked at with the
> right tools. However, in this case it turns out it wraps another
> format from Pynac which is probably also not opaque but needs an
> expert to make sense of)
>
> Things go wrong in sage.symbolic.expression.Expression , which
> basically just wraps Pynac's GArchive. Apparently, this routine
> handles free "variables" properly but not "free functions".
>
> The bug will be immediately pushed upstream to Pynac developers, but
> luckily those are actively involved in sage.
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