[Numpy-discussion] histogram gives meaningless results with non-finite range

[Luke Zoltan Kelley]

np.histogram(np.arange(10), range=(0.0, np.inf))

(array([0, 0, 0, 0, 0, 0, 0, 0, 0, 0]),
array([ nan, inf, inf, inf, inf, inf, inf, inf, inf, inf, inf]))

np.histogram(np.arange(10), range=(0.0, np.nan))

(array([0, 0, 0, 0, 0, 0, 0, 0, 0, 0]),
array([ nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan]))

Clearly the behavior is undefined for those arguments, but perhaps there should be an assertion that the given range must be finite? Happy to make a PR for this.

Luke