#13447: Make libsingular multivariate polynomial rings collectable
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Reporter: nbruin | Owner: rlm
Type: defect | Status:
needs_info
Priority: major | Milestone:
sage-5.4
Component: memleak | Resolution:
Keywords: | Work issues: Input
from libsingular experts
Report Upstream: Reported upstream. No feedback yet. | Reviewers:
Authors: | Merged in:
Dependencies: | Stopgaps:
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Comment (by nbruin):
With the new refcounting, I think it could be that
`currRingHdl.data.uring` holds the last reference to a ring. In fact, it
seems that was the source of the segfaults. If that reference is removed
in `call_function`, shouldn't we delete the ring? The naive solution
{{{
...
currRingHdl.data.uring.ref -= 1
if currRingHdl.data.uring.ref == 0:
rDelete(currRingHdl.data.uring)
currRingHdl.data.uring = currRing # ref counting?
currRingHdl.data.uring.ref += 1
...
}}}
seems to have no ill effect (I put a print statement there that did
produce some output, so it does happen), but perhaps I'm overlooking
something. Are there other places where references are liable to be lost?
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/13447#comment:17>
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