In [1]: from scipy.stats import mstats

In [2]: %paste
        x = [1, 3, 5, 7, 9]
        y = [2, 4, 6, 8, 10]
## -- End pasted text --

In [3]: mstats.kruskal(x, y)
---------------------------------------------------------------------------
ValueError                                Traceback (most recent call last)
<ipython-input-3-5edb46bc91da> in <module>()
----> 1 mstats.kruskal(x, y)

/home/br/virtualenvs/np/local/lib/python2.7/site-packages/scipy/stats/mstats_basic.pyc in kruskal(*args)
   1047     ngrp = ranks.count(-1)
   1048     ntot = ranks.count()
-> 1049     H = 12./(ntot*(ntot+1)) * (sumrk**2/ngrp).sum() - 3*(ntot+1)
   1050     # Tie correction
   1051     ties = count_tied_groups(ranks)

/home/br/repos/numpy/build/testenv/lib/python2.7/site-packages/numpy/ma/core.pyc in __truediv__(self, other)
   3983         if self._delegate_binop(other):
   3984             return NotImplemented
-> 3985         return true_divide(self, other)
   3986 
   3987     def __rtruediv__(self, other):

/home/br/repos/numpy/build/testenv/lib/python2.7/site-packages/numpy/ma/core.pyc in __call__(self, a, b, *args, **kwargs)
   1126         # Get the result
   1127         with np.errstate(divide='ignore', invalid='ignore'):
-> 1128             result = self.f(da, db, *args, **kwargs)
   1129         # Get the mask as a combination of the source masks and invalid
   1130         m = ~umath.isfinite(result)

ValueError: operands could not be broadcast together with shapes (2,) (2,5) 

$ git bisect bad
36f76ea2e6e91062df12d3a46ccaed7822bc82f2 is the first bad commit
commit 36f76ea2e6e91062df12d3a46ccaed7822bc82f2
Author: Allan Haldane <allan.haldane@gmail.com>
Date:   Sun Feb 14 02:49:19 2016 -0500

    ENH: add extra kwargs and update doc of many MA methods

    Updated any, all, sum, prod, cumsum, cumprod, min, max, argmin, argmax,
    mean, var

:040000 040000 e41cfd58bb4bbabc11471a0bd443b24be91b45d0 7f99716492632508bc4d664d424c7cf22d6cd5cb M  numpy