#19411: hidden but caught infinite loop action of cartesian products of growth
groups
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Reporter: dkrenn | Owner:
Type: defect | Status: new
Priority: minor | Milestone: sage-6.10
Component: asymptotic expansions | Keywords:
Merged in: | Authors:
Reviewers: | Report Upstream: N/A
Work issues: | Branch:
Commit: | Dependencies:
Stopgaps: |
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{{{
sage: from sage.rings.asymptotic.growth_group import GrowthGroup
sage: A = GrowthGroup('QQ^x * x^ZZ'); A
sage: cm = sage.structure.element.get_coercion_model()
sage: E = GrowthGroup('ZZ^x * x^QQ')
sage: cm.record_exceptions()
sage: cm.common_parent(A, E)
Growth Group QQ^x * x^QQ
sage: for t in cm.exception_stack():
....: print t
}}}
brings up
{{{
Traceback (most recent call last):
...
CoercionException: Infinite loop in action of Growth Group QQ^x * x^QQ
(parent <class
'sage.rings.asymptotic.growth_group_cartesian.UnivariateProduct_with_category'>)
and Growth Group ZZ^x * x^QQ (parent <class
'sage.rings.asymptotic.growth_group_cartesian.UnivariateProduct_with_category'>)!
}}}
It is caught, so it does not make a problem at all, but IMHO shouldn't be
there.
--
Ticket URL: <http://trac.sagemath.org/ticket/19411>
Sage <http://www.sagemath.org>
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