[Numpy-discussion] ** On entry to ILAENV parameter number 2 had an illegal value

[David Cournapeau]

On Mon, Aug 3, 2009 at 6:32 PM, Steven Coutts<stevec at couttsnet.com> wrote:
> David Cournapeau wrote:
>
>>
>> Do you mean that if you build with debug information, everything else
>> being equal, you cannot reproduce the crashes ?
>>
>> cheers,
>>
>> David
>
> That does appear to be the case, SciPy 1.7.0 is now also running fine.

It is just getting weirder - the fact that numpy worked with bare
BLAS/LAPACK and crashed with atlas lead me to think that it was an
atlas problem. But now, this smells more like a compiler problem. I
would first really check that the only difference between crash vs. no
crash is debug vs non debug (both with ATLAS), to avoid chasing wrong
hints. Practically, I would advised you to "clone" the numpy sources
(one debug, one non debug), and build from scratch with a script to do
things in a repeatable manner.

Then, if indeed you have crash only with non debug build, I would
recommend to install my project numscons, to be able to "play" with
flags, and first try building with the exact same flags as a normal
build, but adding the -g flag. For example:

CFLAGS="-O2 -fno-strict-aliasing -g" python setupscons.py install
--prefix=blabla

Hopefully, you will be able to reproduce the crash and get a backtrace,

cheers,

David