#9003: Doctest (or whatever???) failure on Mac OS X in free_module.py
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Reporter: kcrisman | Owner: tbd
Type: defect | Status: needs_review
Priority: major | Milestone: sage-4.4.3
Component: doctest | Keywords:
Author: | Upstream: N/A
Reviewer: | Merged:
Work_issues: |
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Comment(by craigcitro):
Replying to [comment:25 wjp]:
> If I understand it correctly, the only reason that it works on other
systems is that the garbage collector deletes an object ({{{QQ^7}}})
between the two doctests. I think it would be safer not to depend on that.
Actually, I don't know that it's the garbage collector:
{{{
sage: V = QQ^7
sage: V.rename('foo')
sage: V
foo
sage: del V
sage: import gc
sage: gc.collect()
54
sage: QQ^7
foo
}}}
Of course, maybe I'm tricking myself because something else is holding
onto a non-weakref that prevents the stored `V` from being collected?
That said, I think the answer to Leif's question above is "yes and no." I
think this *will* fix the issue for now, which is good. On the other hand,
I think there still are weirdnesses lurking that should be investigated
... or at least explained to me if they're already understood. `;)`
It can't _just_ be the garbage collector -- the fact that the version
strings were futzing with it means that it somehow has to intersect with
weirdness related to pickling ... maybe because of the pickle jar? In any
event, there's some weird behavior, and we should open a ticket to ferret
out that weird behavior. Once that's open, I say positive review and merge
Willem Jan's patch ...
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/9003#comment:26>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica,
and MATLAB
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