vi ~/local/anaconda2/lib/python2.7/site-packages/numpy/lib/function_base.py

histogram_patch.py

    # Do not modify the original value of range so we can check for `None`
    if range is None:
        if a.size == 0:
            # handle empty arrays. Can't determine range, so use 0-1.
            mn, mx = 0.0, 1.0
        else:
            mn, mx = a.min() + 0.0, a.max() + 0.0
            # add below
            if not np.all(np.isfinite([mn, mx])):
                b = a[np.isfinite(a)]
                if b.size == 0:
                    mn, mx = 0., 1.
                else:
                    mn, mx = b.min() + 0.0, b.max() + 0.0