Lambert W function in Scipy 0.16.0 on Linux returns NaN #425
Description
The lambertw function in Scipy 0.16.0 for Python 3.4.3 returns NaN, no matter the input value. This only happens for Linux (I tested on Ubuntu 14.04), no problems on Windows. Furthermore, building numpy and scipy myself resolves the issue. The lambertw tests in scipy also fail. See also: http://stackoverflow.com/questions/30792319/anaconda3-scipy-special-lambertw-function-return-nan
$ conda info
Current conda install:
platform : linux-64
conda version : 3.16.0
conda-build version : 1.17.0
python version : 3.4.3.final.0
$ ipython
In [1]: import scipy
In [2]: scipy.__version__
Out[2]: '0.16.0'
In [3]: import numpy
In [4]: numpy.__version__
Out[4]: '1.9.2'
In [5]: from scipy.special import lambertw
In [6]: lambertw(1.0)
Out[6]: (nan+0j)
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