#11911: Fix missing uniqueness of parents when unpickling libsingular polynomial
rings
-------------------------+--------------------------------------------------
Reporter: SimonKing | Owner: was
Type: defect | Status: new
Priority: major | Milestone: sage-4.7.2
Component: pickling | Keywords: unpickle libsingular unique parents
Work_issues: | Upstream: N/A
Reviewer: | Author:
Merged: | Dependencies:
-------------------------+--------------------------------------------------
First session:
{{{
sage: P.<foo,bar> = PolynomialRing(QQ)
sage: save(P,'tmp')
}}}
Second session:
{{{
sage: Q = load('tmp.sobj')
sage: P.<foo,bar> = PolynomialRing(QQ)
sage: Q is P
False
sage: Q2 = load('tmp.sobj')
sage: Q2 is P
True
sage: Q2 is Q
False
}}}
That is fixed with the attached patch.
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/11911>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica,
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