Tim Peters added the comment:
I think Raymond will have to chime in. I assume this is due to the
`letter_range` portion of the test suffering hash randomization dealing it a
bad hand - but the underlying string hash is "supposed to be" strong regardless
of seed. The
self.assertGreater(4*u, t)
AssertionError: 124 not greater than 128
failure says 128 distinct sets hashed to only u = 124/4 = 31 distinct values
across their hashes' last 7 bits, and that's worth complaining about. It's way
too many collisions.
It _may_ be a flaw in the set hash, or in the string hash, or just plain bad
luck, but there's really no way to know which without digging into details.
----------
nosy: +tim.peters
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<http://bugs.python.org/issue26163>
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