#16239: ZZ in the wrong category
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Reporter: tscrim | Owner: sage-combinat
Type: defect | Status: needs_work
Priority: major | Milestone: sage-6.3
Component: categories | Resolution:
Keywords: integer ring, | Merged in:
category | Reviewers: Nicolas M. Thiéry
Authors: Travis Scrimshaw | Work issues:
Report Upstream: N/A | Commit:
Branch: | 8f67fb521e4a1baf0a78a65a1b4359698b3bf872
public/categories/fix_ZZ-16239 | Stopgaps:
Dependencies: |
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Comment (by tscrim):
The warning is issued by `EnumeratedSetFromIterator` when
`_test_an_element` calls `self(an_element)` where `self` is `E`. From
there, the parent of `an_element` is `ZZ`, which the parent's default
`__call__` tries to see if the parent is `self` by equality, leading to
the `__eq__` call with `ZZ` being a different enumerated set.
So how do we fix this? I'm not quite sure what the best way to proceed is,
put the warning in the test, remove the warning, rework `_test_an_element`
to better support facade parents, ...?
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Ticket URL: <http://trac.sagemath.org/ticket/16239#comment:23>
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