$ python tests/testBox.py 

.E................

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ERROR: testConstruction (__main__.Box2DTestCase)

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Traceback (most recent call last):

  File "tests/testBox.py", line 292, in testConstruction

    self.assertFloatsAlmostEqual(box.getDimensions(), geom.Extent2D(abs(dim.getX()), abs(dim.getY())))

  File "/Users/timj/work/lsstsw3/stack/DarwinX86/utils/12.0-10-g3b62a7d+1/python/lsst/utils/tests.py", line 636, in assertFloatsAlmostEqual

    for a, b, diff, rel in zip(lhs[bad], rhs[bad], absDiff[bad], relTo[bad]):

  File "/Users/timj/work/lsstsw3/build/afw/python/lsst/afw/geom/geomLib.py", line 2113, in __getitem__

    if k < 0 or k >= 2: raise IndexError(k)

ValueError: The truth value of an array with more than one element is ambiguous. Use a.any() or a.all()

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Ran 18 tests in 0.038s

FAILED (errors=1)