#14711: Memleak when creating QuadraticField
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Reporter: jpflori | Owner:
Type: defect | davidloeffler
Priority: critical | Status: new
Component: number fields | Milestone: sage-5.12
Keywords: memleak, number field, | Resolution:
QuadraticField | Merged in:
Authors: | Reviewers:
Report Upstream: N/A | Work issues:
Branch: u/SimonKing/ticket/14711 | Commit:
Dependencies: | Stopgaps:
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Comment (by SimonKing):
Replying to [comment:57 SimonKing]:
> I just found something crazy: Apparently the rational field got garbage
collected in one of the crashing examples. Hard to believe.
Fortunately I was mistaken: It is only the case that the `__init__` method
is called repeatedly on the same object `QQ` if you call `RationalField()`
repeatedly. Namely, it is not using a classcall metaclass, but does the
caching in `__new__`---but `__init__` is always called after `__new__`,
whether it is cached or not. That's one of the reasons for introducing
classcall metaclass.
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Ticket URL: <http://trac.sagemath.org/ticket/14711#comment:58>
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