Dear Simon,

Reports follow - thanks for investigating this one.  Should have been an 
8-thread run, unclear how much load there would have been.

Passed immediately on solo try.  Full log file should be public at: 

https://cloud.sagemath.com/projects/53b77207-8614-4086-a032-432af4b4cdbd/files/sage-dev-images/sage-6.6.rc3/logs/ptestlong.log

Rob

sage -t --long --warn-long 114.3 src/sage/modular/modform/ambient.py
**********************************************************************
File "src/sage/modular/modform/ambient.py", line 812, in 
sage.modular.modform.ambient.?._compute_hecke_matrix
Failed example:
    f = t.charpoly()                   # long time (4s)
Expected nothing
Got:
    you are running out of primes. 1000 coprime primes found
**********************************************************************
File "src/sage/modular/modform/ambient.py", line 813, in 
sage.modular.modform.ambient.?._compute_hecke_matrix
Failed example:
    [f[0]%p for p in prime_range(100)] # long time (0s, depends on above)
Expected:
    [0, 0, 0, 0, 1, 9, 2, 7, 0, 0, 0, 0, 1, 12, 9, 16, 37, 0, 21, 11, 70, 
22, 0, 58, 76]
Got:
    [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 
1, 1]
**********************************************************************
File "src/sage/modular/modform/ambient.py", line 815, in 
sage.modular.modform.ambient.?._compute_hecke_matrix
Failed example:
    [f[42]%p for p in prime_range(100)] # long time (0s, depends on above)
Expected:
    [0, 0, 4, 0, 10, 4, 4, 8, 12, 1, 23, 13, 10, 27, 20, 13, 16, 59, 53, 
41, 11, 13, 12, 6, 82]
Got:
    [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 
0, 0]
**********************************************************************
1 item had failures:
   3 of   8 in sage.modular.modform.ambient.?._compute_hecke_matrix
    [100 tests, 3 failures, 105.39 s]


On Sunday, April 12, 2015 at 11:49:56 PM UTC-7, Simon King wrote:
>
> Hi Rob, 
>
> On 2015-04-13, Rob Beezer <bee...@ups.edu <javascript:>> wrote: 
> > Three tests failed in  src/sage/modular/modform/ambient.py  but all 
> passed on a 
> > subsequent run of just that file. 
>
> Do you recall how they failed? There is a report of a problem of a 
> garbage collected coercion map above in this thread. Is your problem 
> similar? Since it isn't predictable when garbage collection will happen, 
> it could very well be that you saw the error only once. 
>
> Best regards, 
> Simon 
>
>
>

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