[Numpy-discussion] Segmentation fault with argsort

Charles R Harris charlesr.harris@gmail....
Fri Dec 18 12:01:55 CST 2009


On Fri, Dec 18, 2009 at 10:57 AM, Skipper Seabold <jsseabold@gmail.com>wrote:

> On Fri, Dec 18, 2009 at 12:52 PM, Robert Kern <robert.kern@gmail.com>
> wrote:
> > On Fri, Dec 18, 2009 at 11:46, Keith Goodman <kwgoodman@gmail.com>
> wrote:
> >> I am using the numpy 1.3 binary from Ubuntu 9.10. Is this already
> >> known, fixed, reproducible?
> >>
> >>>> np.array(121).argsort(0).argsort(0)
> >> Segmentation fault
> >>
> >> The expected result:
> >>
> >> AttributeError: 'np.int64' object has no attribute 'argsort'
> >
> > Why would you expect that? On OS X with an SVN checkout ~1.4:
> >
> > In [1]: np.array(121).argsort(0).argsort(0)
> > Out[1]: 0
> >
> > In [6]: np.int64.argsort
> > Out[6]: <method 'argsort' of 'numpy.generic' objects>
> >
>
> Kubuntu 9.10
>
> In [1]: import numpy as np
>
> In [2]: np.__version__
> Out[2]: '1.4.0.dev7539'
>
> In [3]: np.array(121).argsort(0).argsort(0)
> Segmentation fault
>
>
I also see that here on ubuntu 9.10, 64 bits. ISTR recall another such issue
on ubuntu, which makes me think that there might be a compiler problem.

Chuck
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