#11900: Serious regression caused by #9138
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Reporter: SimonKing
| Owner: tbd
Type: defect
| Status: needs_work
Priority: critical
| Milestone: sage-4.8
Component: performance
| Keywords: categories regression
Work_issues: Laurent series rings are fields. Add docs. Don't use is_ring and
friends | Upstream: N/A
Reviewer: Jeroen Demeyer, Nicolas M. Thiéry
| Author: Simon King
Merged:
| Dependencies: #9138 #11911
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Comment(by SimonKing):
One slight complication: The current implementation of
`Fields.__contains__` starts with calling
`super(Fields,self).__contains__`. But the latter is a lazy class
attribute - and thus overrides `Fields.__contains__`.
Probably it is needed to avoid the call to `super`.
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Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/11900#comment:119>
Sage <http://www.sagemath.org>
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