#18905: fix more leaks found in #18897
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Reporter: dimpase | Owner:
Type: defect | Status: new
Priority: major | Milestone: sage-6.8
Component: memleak | Resolution:
Keywords: | Merged in:
Authors: | Reviewers:
Report Upstream: N/A | Work issues:
Branch: | Commit:
Dependencies: #18897 | Stopgaps:
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Comment (by SimonKing):
Replying to [comment:2 pbruin]:
> This is probably because the `algebraic_closure()` method of finite
fields is cached (see #14990), creating circular references between finite
fields and their algebraic closures.
Circular references shouldn't be problematic, unless one of the objects
involved has a `__del__` method. However:
{{{
sage: K = GF(5)
sage: hasattr(K, '__del__')
False
sage: hasattr(K.algebraic_closure(), '__del__')
False
}}}
And indeed:
{{{
sage: while 1:
....: print get_memory_usage()
....: for p in range(2, 102):
....: A = GF(nth_prime(p)).algebraic_closure()
....:
<constant amount of memory>
}}}
--
Ticket URL: <http://trac.sagemath.org/ticket/18905#comment:3>
Sage <http://www.sagemath.org>
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