#9389: Bug in polynomials over residue fields (was: sage crashing when computing
local_data() for an EC)
-----------------------------+----------------------------------------------
Reporter: arminstraub | Owner: davidloeffler
Type: defect | Status: new
Priority: major | Milestone:
Component: number fields | Keywords: segfault polynomial finite field
Author: | Upstream: N/A
Reviewer: | Merged:
Work_issues: |
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Comment(by was):
NOTE:
John, you are *definitely* right that the problem in polynomial coercion
is caused by #7841, since by simply switching to not using NTL polynomials
the proper behavior is restored:
{{{
sage: K.<a> = QuadraticField(5)
sage: R = PolynomialRing(K.ideal(2).residue_field(), 'x',
implementation='generic')
sage: R([1/2*a])
...
TypeError
}}}
If ylchapuy doesn't fix this soon, we could revert his PolynomialRing
implementation for the next Sage release, if necessary....
But probably the fix isn't too hard (for him -- it might be very hard for
me).
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/9389#comment:10>
Sage <http://www.sagemath.org>
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