Francois Bissey wrote:
> 
>> On 29/11/2015, at 08:16, leif <[email protected]> wrote:
>>
>> Volker Braun wrote:
>>> 8400a23 Updated Sage version to 6.10.beta6
>>
>> Besides the usual doctest failure*, I'm getting new numerical noise in
>> beta6:
>>
>> sage -t --long --warn-long 60.9 src/sage/matrix/matrix_double_dense.pyx
>> **********************************************************************
>> File "src/sage/matrix/matrix_double_dense.pyx", line 3761, in
>> sage.matrix.matrix_double_dense.Matrix_double_dense.exp
>> Failed example:
>>    A.exp()  # tol 1e-14
>> Expected:
>>    [-19.614602953804912 + 12.517743846762578*I   3.7949636449582176 +
>> 28.88379930658099*I]
>>    [ -32.383580980922254 + 21.88423595789845*I   2.269633004093535 +
>> 44.901324827684824*I]
>> Got:
>>    [-19.614602953804923 + 12.517743846762574*I  3.7949636449582007 +
>> 28.883799306580993*I]
>>    [-32.383580980922275 + 21.884235957898447*I  2.2696330040935115 +
>> 44.901324827684846*I]
>> Tolerance exceeded in 1 of 8:
>>    2.269633004093535 vs 2.2696330040935115, tolerance 1e-14 > 1e-14
>> **********************************************************************
>> 1 item had failures:
>>   1 of  11 in sage.matrix.matrix_double_dense.Matrix_double_dense.exp
>>    [636 tests, 1 failure, 1.65 s]
>> ----------------------------------------------------------------------
>> sage -t --long --warn-long 60.9 src/sage/matrix/matrix_double_dense.pyx
>> # 1 doctest failed
>> ----------------------------------------------------------------------
>>
>> (Linux on a Haswell, GCC 5.1.0)
>>
> 
> Curious that’s the only place. Do we have patchbots running gcc 5.1.0?
> Which distro also?

Otherwise still Lucid (Ubuntu 10.04.4, meanwhile EOL);  GCC is
configured to produce native code by default, so other machines with the
same processor architecture and the same or a similar GCC version may
still produce different results.


>> __________
>> *
>> sage -t --long --warn-long 60.9 src/sage/symbolic/expression.pyx
>> **********************************************************************
>> File "src/sage/symbolic/expression.pyx", line 11021, in
>> sage.symbolic.expression.Expression._plot_fast_callable
>> Failed example:
>>    plot(s)
>> Expected:
>>    Graphics object consisting of 1 graphics primitive
>> Got:
>>    Graphics object consisting of 0 graphics primitives
>> **********************************************************************
>> 1 item had failures:
>>   1 of  10 in sage.symbolic.expression.Expression._plot_fast_callable
>>    [2526 tests, 1 failure, 34.28 s]
>> ----------------------------------------------------------------------
>> sage -t --long --warn-long 60.9 src/sage/symbolic/expression.pyx  # 1
>> doctest failed
>> ----------------------------------------------------------------------
> 
> Starting from which version did you start to have that one?

I don't recall;  I've reported it a couple of times (but apparently
nobody really cared -- including me) perhaps a year, maybe longer, ago
(same distro, but other machines).


-leif

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