I'm investigating a test error in scipy 0.13.0 beta 1 that was
reported by Christoph Gohlke.  The scipy issue is here:
https://github.com/scipy/scipy/issues/2771

I don't have a Windows environment to test it myself, but Christoph
reported that this code:

```
import numpy as np

data = np.array([-0.375, -0.25, 0.0])
s = np.log(data)
```

does not generate two RuntimeWarnings when it is run with numpy 1.7.1
in a 32 bit Windows 8 environment (numpy 1.7.1 compiled with Visual
Studio compilers and Intel's MKL).  In 64 bit Windows, and in 64 bit
linux, it generates two RuntimeWarnings.

The inconsistency seems like a bug, possibly this one:
https://github.com/numpy/numpy/issues/1958.

Can anyone check if this also occurs in the development branch?

Warren
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