Hi James,

I am not seeing this behavior on master. If you are, would love to know 
additional context.

Stu

> user> (- 0 -9223372036854775808)
> -9223372036854775808
> 
> It's worth noting that -9223372036854775808 is Long/MIN_VALUE, and
> that this is the expected result with native 64-bit longs, though not
> in a language with automatic long-to-BigInteger conversion. It appears
> that a few related bugs (e.g.: http://dev.clojure.org/jira/browse/CLJ-32)
> have been caught and fixed, but this one still lives.
> 
> (I now appreciate why "How do you detect integer overflows?" is one of
> the favorite interview questions of the Software Engineering
> Institute.)
> 
> Sincerely,
> James Koppel
> 
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