Ah, one should never post to a mailing list before a morning coffee! The
reason for the essentially undefined behaviour is that `Hashable`
conformance must guarantee that two instances have the same `hashValue`
if they are `==`, **but not vice versa**! In other words, the equality
in the code snippet should've been implemented along the lines of:
static func == (lhs: X, rhs: X) -> Bool {
return lhs.hashValue == rhs.hashValue && lhs.x == rhs.x
}
Now, where is that coffee?
milos
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