#11580: Magma interface cannot convert multivariate polynomials back to sage
-------------------------------------------+--------------------------------
Reporter: nbruin | Owner: was
Type: defect | Status: needs_work
Priority: minor | Milestone: sage-4.7.2
Component: interfaces | Keywords:
Work_issues: rebase on top of #11456 | Upstream: N/A
Reviewer: William Stein, Marco Streng | Author: Nils Bruin
Merged: | Dependencies:
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Changes (by mstreng):
* reviewer: William Stein => William Stein, Marco Streng
* work_issues: Coordinate with #11456 => rebase on top of #11456
Comment:
This patch breaks conversion of finite field elements from Magma to Sage.
Without patch:
{{{
sage: magma(GF(2)(1)).sage()
1
}}}
With patch:
{{{
sage: magma(GF(2)(1)).sage()
...
Segmentation fault
...
Magma crashed executing _sage_[3], _sage_[4] := Sage(_sage_[2]);
}}}
With patch:
{{{
sage -t -only-optional=magma
devel/sage/sage/rings/finite_rings/element_givaro.pyx
(same crash)
}}}
When converting finite field elements from Magma to Sage, they are first
converted to a {{{SeqEnum}}} of finite field elments. In particular, a
proper implementation of conversions of {{{SeqEnum}}} to Sage sets of an
infinite loop. This was fixed in #11456, so we should rebase this patch on
top of #11456.
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/11580#comment:9>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica,
and MATLAB
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