ObjectSizeStarSelector can produce the following numpy warnings:

objectSizeStarSelector.py:382: RuntimeWarning: invalid value encountered in less

  bad = numpy.logical_or(bad, width < self.config.widthMin)

objectSizeStarSelector.py:383: RuntimeWarning: invalid value encountered in greater

  bad = numpy.logical_or(bad, width > self.config.widthMax)

I suggest that the star selector handle this situation more gracefully, e.g. by reporting an appropriate exception or handling the data in an appropriate way. If logging a message would be helpful, then please do that. (DM-5428 handled a similar warning).

One way to reproduce this is to build ci_hsc.