Hi,
I hit the following doctest failure in Sage 3.0.5/3.0.6.alpha0:
sage -t -long devel/sage/sage/modular/ssmod/ssmod.py
**********************************************************************
File "/scratch/mabshoff/release-cycle/sage-3.0.6.alpha0/tmp/ssmod.py",
line 14:
sage: D[:3]
Expected:
[
(Vector space of degree 33 and dimension 1 over Finite Field of
size 97
Basis matrix:
[ 0 0 0 1 96 96 1 96 96 0 2 96 96 0 1 0 1 2 95 0 1
1 0 1 0 95 0 96 95 1 96 0 2], True),
(Vector space of degree 33 and dimension 1 over Finite Field of
size 97
Basis matrix:
[ 0 1 96 75 16 81 22 17 17 0 0 80 80 1 16 40 74 0 0 96 81 23
57 74 0 0 0 24 0 23 73 0 0], True),
(Vector space of degree 33 and dimension 1 over Finite Field of
size 97
Basis matrix:
[ 0 1 96 90 90 7 7 6 91 0 0 91 6 13 7 0 91 0 0 84 90
6 0 6 0 0 0 90 0 91 7 0 0], True)
]
Got:
[
(Vector space of degree 33 and dimension 0 over Finite Field of
size 97
Basis matrix:
[], True),
(Sparse vector space of degree 33 and dimension 12 over Finite
Field of size 97
Basis matrix:
[ 1 0 0 0 0 0 0 0 0 0 0 0 65 15 3 52 25 45 94 79 81 74
65 88 29 13 2 8 38 69 23 75 80]
[ 0 1 0 0 0 0 0 0 0 0 0 0 93 65 51 90 69 12 16 63 86 58
11 60 64 1 73 81 21 6 63 53 49]
[ 0 0 1 0 0 0 0 0 0 0 0 0 5 90 42 3 83 95 4 22 44 54
32 12 89 17 41 18 67 30 3 70 94]
[ 0 0 0 1 0 0 0 0 0 0 0 0 19 89 93 10 17 95 59 8 59 90
69 9 61 23 74 76 17 86 87 5 36]
[ 0 0 0 0 1 0 0 0 0 0 0 0 29 10 12 37 78 20 64 60 33 25
24 14 59 85 4 61 34 51 60 30 86]
[ 0 0 0 0 0 1 0 0 0 0 0 0 19 71 82 94 82 35 95 10 49 56
25 60 59 1 27 60 90 37 70 29 50]
[ 0 0 0 0 0 0 1 0 0 0 0 0 49 32 61 16 26 5 29 87 59 91
86 14 41 37 58 69 80 59 5 46 56]
[ 0 0 0 0 0 0 0 1 0 0 0 0 3 11 85 67 70 42 30 37 24
21 0 74 54 28 17 30 37 86 27 22 46]
[ 0 0 0 0 0 0 0 0 1 0 0 0 25 49 19 4 53 89 56 76 13 6
57 10 37 90 81 9 53 74 48 74 13]
[ 0 0 0 0 0 0 0 0 0 1 0 0 3 77 83 63 11 76 52 72 61 60
56 47 60 56 81 93 86 28 65 48 59]
[ 0 0 0 0 0 0 0 0 0 0 1 0 73 1 72 85 92 48 84 24 31 95
84 24 93 35 22 46 23 7 46 55 66]
[ 0 0 0 0 0 0 0 0 0 0 0 1 9 26 59 64 33 6 59 80 2 79
79 35 38 10 34 90 27 11 75 39 73], True),
(Sparse vector space of degree 33 and dimension 20 over Finite
Field of size 97
Basis matrix:
20 x 33 sparse matrix over Finite Field of size 97, True)
]
**********************************************************************
File "/scratch/mabshoff/release-cycle/sage-3.0.6.alpha0/tmp/ssmod.py",
line 26:
sage: len(D)
Expected:
9
Got:
3
**********************************************************************
1 items had failures:
2 of 17 in __main__.example_0
***Test Failed*** 2 failures.
Andrezj did also hit it once with Sage 3.0.4 or 3.0.5, but he could
not reproduce it. I am also unable to reproduce this reliably, but I
ran the ssmod.py doctest about 110 times and hit it twice. So could
somebody with the mathematical background tell me if this is a bad,
very bad or very, very bad. Any ideas if FLINT could be involved here?
We ship 1.0.11 which according to Bill Hart has a known buglet/corner
case we could hit. There is a new 1.0.12 release out there which fixes
that bug, so I am not sure how much time I should investigate here to
attempt to find something.
Thoughts?
Cheers,
Michael
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