On 2012-09-07 15:24, John Cremona wrote:
> The code below causes a singular error, in 5.1 and 5.2 it's
> "RuntimeError: zz_pContext: p must be > 1" while in 5.3.rc1 it's
> "RuntimeError: Floating point exception".  Has this been seen before,
> or is a new ticket required?

It seems to be fixed by #13237.  I get the answer

sage: ffQ3
(27) * (x - y) * (x + (z)*y) * (x + (-z + 1)*y) * (x*y + (z)*x + (z)*y +
(-2*z + 2)) * (x*y + (-z + 1)*x + (z)*y - 2) * (x*y + (z)*x + (-z + 1)*y
- 2) * (x*y - x + (-z + 1)*y + (-2*z + 2)) * (x*y + (-z + 1)*x - y +
(-2*z + 2)) * (x*y + (z)*x - y + (2*z)) * (x*y - x + (z)*y + (2*z)) *
(x*y + (-z + 1)*x + (-z + 1)*y + (2*z)) * (x*y - x - y - 2)

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