Several people wrote in to explain how the autoboxing worked and how the code could be rewritten so the equality was transitive. This misses the point. I know how autoboxing works. I know what the compiled byte code is actually doing, and I know how to write the code so that this doesn't happen. But that doesn't invalidate what I wrote. It should not be possible to write code such that equality is not transitive. Equality needs to be transitive on all paths, not just some of them.
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