#13447: Make libsingular multivariate polynomial rings collectable
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Reporter: nbruin |
Owner:
Type: defect |
Status: needs_work
Priority: major |
Milestone: sage-5.4
Component: memleak |
Resolution:
Keywords: | Work
issues: Understand why sometimes `new_RingWrap` needs an incref and sometimes
not
Report Upstream: None of the above - read trac for reasoning. |
Reviewers: Simon King
Authors: Nils Bruin, Simon King | Merged
in:
Dependencies: #11521 |
Stopgaps:
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Comment (by SimonKing):
I guess the recreation of my_awesome_sage_ring can be avoided, because
Singular certainly has methods to return a previously defined ring when
you know the name of that ring. So, no need that ''Sage'' keeps a pointer
to it, because Singular already does.
The segfault in sage/rings/polynomial/multi_polynomial_ideal.pyx can be
avoided by setting `ref=1` rather than `ref=0` in the function
`singular_ring_new`. However, I wouldn't call it a "fix", because I think
this would mean the ring could never be `rKill`ed.
So, I suspect that the reference count goes wrong in a different location.
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/13447#comment:77>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica,
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