Issue 28 created with patch attached: 
http://code.google.com/p/clojure/issues/detail?id=28

On Dec 14 2008, 12:42 am, Olov Lassus <olov.las...@gmail.com> wrote:
> Hi,
> thanks for Clojure! Here's my first contribution (CA filled out and  
> will arrive next week):
>
> Negating Integer.MIN_VALUE overflows but should return a BigInteger.  
> It also affects binary subtraction since Clojure implements it using  
> negation and addition. The overflow occurs silently without throwing  
> an exception.
>
> These examples trigger the flaw:
>
> user=> (- -2147483648)
> -2147483648
>
> user=> (- -1 -2147483648)
> -2147483649
>
> The attached patch is created against trunk r1159. Same examples after  
> applying it:
>
> user=> (- -2147483648)
> 2147483648
>
> user=> (- -1 -2147483648)
> 2147483647
>
> /Olov Lassus
>
>  detect_negate_overflow.patch
> < 1KViewDownload
>
>
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