#19244: Broken doctest in src/sage/categories/fields.py
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Reporter: jdemeyer | Owner:
Type: defect | Status: needs_review
Priority: blocker | Milestone: sage-6.9
Component: memleak | Resolution:
Keywords: random_fail | Merged in:
Authors: Simon King | Reviewers:
Report Upstream: N/A | Work issues:
Branch: | Commit:
u/SimonKing/broken_doctest_in_src_sage_categories_fields_py|
65ece650612dfb15bd1139245f9ac72bd94c9b68
Dependencies: | Stopgaps:
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Comment (by SimonKing):
Replying to [comment:7 jdemeyer]:
> What's the point of this?
> {{{
> #!diff
> + sage: len([X for X in gc.get_objects() if isinstance(X,
sage.rings.finite_rings.integer_mod_ring.IntegerModRing_generic)]) > n
> + True
> }}}
At time t, we determine the number n of fields in cache. At time t+2 we
test that the number of fields in cache is again n. With the above line, I
want to demonstrate that at time t+1, we really have more rings in cache
than at time t. Otherwise, we actually haven't shown that a garbage
collection has happened between time t+1 and time t+2. And that's the aim
of the whole test: We have to show that at some point a ring exists and
later it has vanished. The line shows that the ring exists.
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Ticket URL: <http://trac.sagemath.org/ticket/19244#comment:8>
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