#15777: Problems with polynomials over extensions of finite fields
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Reporter: tscrim | Owner: tscrim
Type: defect | Status: new
Priority: critical | Milestone: sage-6.2
Component: basic arithmetic | Keywords:
Merged in: | Authors:
Reviewers: | Report Upstream: N/A
Work issues: | Branch:
Commit: | Dependencies:
Stopgaps: |
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While looking at #13642, I noticed the following:
{{{
sage: k = GF(5)
sage: D.<x> = k[]
sage: l.<x> = k.extension(x^2 + 2)
sage: R.<t> = l[]
sage: f = t^4 + (2*x - 1)*t^3 + (2*x + 1)*t^2 + 3
sage: h = t^4 - x*t^3 + (3*x + 1)*t^2 + 2*t + 2*x - 1
sage: pow(f, 2, h)
---------------------------------------------------------------------------
RuntimeError Traceback (most recent call
last)
...
RuntimeError: PowerMod: bad args
sage: pow(t, 2, x) # segfault
}}}
This occurs on a clean 6.1.
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Ticket URL: <http://trac.sagemath.org/ticket/15777>
Sage <http://www.sagemath.org>
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