#11900: Serious regression caused by #9138
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Reporter: SimonKing | Owner:
tbd
Type: defect | Status:
needs_review
Priority: critical | Milestone:
sage-5.0
Component: performance | Keywords:
categories regression
Work_issues: Update reviewer patch | Upstream:
N/A
Reviewer: Jeroen Demeyer, Nicolas M. Thiéry, Simon King | Author:
Simon King
Merged: | Dependencies:
#9138 #11911 #9562
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Comment(by SimonKing):
Replying to [comment:198 nthiery]:
> I just had a look at the ``in Rings()`` code. Maybe Cython should be
> complaining when trying to assign None to a variable of a given
> type.
I'm not sure. I think the idea is the same as having a point (in C) point
to NULL.
> If ``x`` is not a category object, does it make sense to call
> x.category()? Shouldn't this just always return False? Otherwise,
> there should be an example in the doctests illustrating this.
I guess that is the same problem that hit me in #11521: There are objects
that aren't `CategoryObject` instances. Any integer is an example.
I don't remember if actually doc tests would fail if we simplify the code.
But I guess I wrote that for a reason. Well, let's simply try...
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/11900#comment:199>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica,
and MATLAB
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