#13896: Fix cython's gc_track and gc_untrack
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Reporter: nbruin |
Owner: rlm
Type: defect |
Status: new
Priority: blocker |
Milestone: sage-5.6
Component: memleak |
Resolution:
Keywords: | Work
issues:
Report Upstream: Reported upstream. Developers acknowledge bug. |
Reviewers:
Authors: | Merged
in:
Dependencies: |
Stopgaps:
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Comment (by jpflori):
Replying to [comment:11 robertwb]:
> The final call to the (generic) tp_free calls PyObject_GC_Untrack iff
the GC flags are set in the type flags. If the base class is not GC
tracked then its dealloc method won't touch these bits.
Sorry to insist a little bit, but while looking at the trashcan stuff, I
thought again about it and in fact what I was worried about was rather the
converse.
If the base type does not have the GC_FLAG, and youve retracked it in the
subclass, then final tp_free will indeed not touch anything related to gc,
but won't that leave an invalid object in the gc tracked object list?
In particular won't a call to gc_list_remove(o) be missing?
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Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/13896#comment:16>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica,
and MATLAB
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