I do not have any easy way to run that build. It certainly doesn't run on 
my machine (12.10 x86). Is there a straightforward way to run it that I'm 
unaware of? 

Also, can you clarify for me: does this build-related error appear on lots 
of machines (i.e. have other people encountered it), or only on your 
specific machine?

One possible cause comes to mind. All of the riemann computations involve 
solving fairly large (100x100 to 1000x1000) complex-valued matrix 
equations. Are there any other packages in sage that do computations of 
this sort as part of the doctests? If there aren't many it's conceivable 
that the build error is related to that solve routine and only the riemann 
doctests happen to catch it. The riemann package really doesn't do anything 
particularly strange as it relates to ATLAS. It only makes one complex 
valued matrix solve call, and that is made through standard channels and 
the matrix shouldn't be particularly pathological.

Ethan

On Tuesday, January 22, 2013 11:35:18 AM UTC-8, Jeroen Demeyer wrote:
>
> On 2013-01-22 20:13, Ethan Van Andel wrote: 
> > Has anyone else encountered the numerical errors? I'm happy to dig in 
> > and try to figure out what's happening, but if the  failed build errors 
> > can't be duplicated (or even if I don't have a way to duplicate them), 
> > there's not much I can do. 
>
> Here is a binary of a bad build: 
>
> http://boxen.math.washington.edu/home/buildbot/sage-5.6.rc1-bad-riemann.tar.bz2
>  
>
> This was made on sage.math (8.04.4 LTS x86_64). 
>

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