#12313: Fix yet another memory leak caused by caching of coercion data
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Reporter: SimonKing | Owner:
Type: defect | Status:
positive_review
Priority: major | Milestone: sage-5.3
Component: memleak | Resolution:
Keywords: coercion weak dictionary | Work issues:
Report Upstream: N/A | Reviewers: Simon King,
Jean-Pierre Flori, John Perry, Nils Bruin
Authors: Simon King, Jean-Pierre Flori | Merged in:
Dependencies: #11521, #11599, #12969, #12215 | Stopgaps:
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Comment (by AlexanderDreyer):
Replying to [comment:246 SimonKing]:
> > '''EDIT:''' Plus the complication about
`GroebnerStrategy._strat.generators` and `ReductionStrategy._strat`. I
suspect this whole bit can be cleaned up without resorting to `borrowed`
flags but this is not the place.
>
> Well, but how, without opening the polybori spkg?
Thanks for pointing out this issue. But it is not related to the spkg. In
the spkg you have a composed C++ class with public attributes, that is
managed with C++ constructors and destructors.
But cython seems not to be able to wrap the c++ attributes (unlike
`PolyBoRi`'s original interface based on boost/python). The only solution
I can think of is the a flag, which was exactly what this ticket came up
with. Alternatively a reference count. (I think boost/python uses one or
the other internally, too.)
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/12313#comment:249>
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