On Thu, Sep 25, 2008 at 3:40 PM, mabshoff <[EMAIL PROTECTED]> wrote:
>
>
>
> On Sep 25, 2:39 pm, Nick Alexander <[EMAIL PROTECTED]> wrote:
>> On 25-Sep-08, at 2:36 PM, John Cremona wrote:
>>
>>
>>
>>
>>
>> > 2008/9/25 William Stein <[EMAIL PROTECTED]>:
>>
>> >> On Wed, Sep 24, 2008 at 3:42 AM, mabshoff <[EMAIL PROTECTED]>
>> >> wrote:
>>
>> >>> Hello folks,
>>
>> >>> this is alpha1, a couple hours later than I wanted, but than a bunch
>> >>> of things got in the way during the day. Sources are in the usual
>> >>> place at
>>
>> >>>http://sage.math.washington.edu/home/mabshoff/release-cycles-3.1.3/sa...
>>
>> >> I thought we slayed this, but on eno we have this weird failure:
>>
>> >> sage -t -long devel/sage/sage/rings/
>> >> finite_field_ntl_gf2e
>> >> .pyx
>> >> **********************************************************************
>> >> File "/home/wstein/eno/build/sage-3.1.3.alpha1/tmp/
>> >> finite_field_ntl_gf2e.py",
>> >> line 167:
>> >> sage: k.modulus()
>> >> Expected:
>> >> x^1024 + x^19 + x^6 + x + 1
>> >> Got:
>> >> x^1024 + x^16 + x^15 + x^14 + x^13 + x^11 + x^10 + x^9 + x^7 +
>> >> x^6 + x^2
>> >> **********************************************************************
>> >> 1 items had failures:
>> >> 1 of 10 in __main__.example_2
>> >> ***Test Failed*** 1 failures.
>>
>> > That is strange, since the constructor for degree up to 2048 uses a
>> > precomputed table (in NTL) so should definitely not change.
>>
>> Also note that the result is reducible.
>>
>> Nick
>
> Yes, that is really the odd thing. IIRC last time we fixed this we
> turned some weak references into references and the problem magically
> went away. Unfortunately this bug seems to be a Zombie and I have no
> clue how to debug this :(
>
It is definitely a heisenbug. I just tried the test on the same machine again
10 times and it passes every time:
[EMAIL PROTECTED] sage-3.1.2]$ ./sage -t --long
devel/sage/sage/rings/finite_field_ntl_gf2e.pyx
sage -t --long devel/sage/sage/rings/finite_field_ntl_gf2e.pyx
[1.2 s]
----------------------------------------------------------------------
All tests passed!
Total time for all tests: 1.2 seconds
William
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