#11521: Memleak when resolving the action of Integers on an Elliptic Curve
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Reporter: jpflori | Owner: robertwb
Type: defect | Status: needs_work
Priority: major | Milestone: sage-4.8
Component: coercion | Keywords: sd35
Work_issues: | Upstream: N/A
Reviewer: | Author: Simon King
Merged: | Dependencies: #11900 #715
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Comment(by jpflori):
For info, resetting ZZ._action_hash to {} is not sufficient to let the
IntegerMulAction be garbage collected.
Objgraph shows 3 objects pointing to the abelian group of points of the
curve (itself pointing to the curve):
- the IntegerMulAction
- the point at infinity (?)
- a dict of size 11 which is in fact an attribute
(_Scheme__ring_point_homset) of the curve (as a scheme) itself.
I'd be happy to test a weakref for values version of your patch regardless
of the spedd impact.
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Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/11521#comment:80>
Sage <http://www.sagemath.org>
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