#715: Parents probably not reclaimed due to too much caching
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Reporter: robertwb |
Owner: somebody
Type: defect |
Status: closed
Priority: major |
Milestone: sage-5.5
Component: coercion |
Resolution: fixed
Keywords: weak cache coercion Cernay2012 | Work
issues:
Report Upstream: N/A |
Reviewers: Jean-Pierre Flori, Simon King, Nils Bruin
Authors: Simon King, Jean-Pierre Flori |
Merged in: sage-5.5.beta0
Dependencies: #13145, #13741, #13746, to be merged with #11521 |
Stopgaps:
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Comment (by jpflori):
Thanks for the report, there is definitely something wrong with our Python
refcounting and use of weakrefs.
I'm currently investigating this using a debug build of Python.
With it, some ref counts get negative very quickly and Sage aborts because
of the assert which are now tested.
In fact, while importing Sage, Python just has the time to:
* create the empty set in sage/structure/parent.pyx
* create the Mathematica interface in sage/interfaces/mathematica.pyx
* assert fails and abort.
Any idea if Sage ever worked correctly with such a build?
I'm rebuilding a Sage 5.2 with such a build just to see.
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Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/715#comment:351>
Sage <http://www.sagemath.org>
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