[GHC] #12611: expression calculation error

[GHC]

#12611: expression calculation error
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        Reporter:  Tom       |                Owner:
            Type:  bug       |               Status:  new
        Priority:  normal    |            Milestone:
       Component:  Compiler  |              Version:  8.0.1
      Resolution:            |             Keywords:
Operating System:  Windows   |         Architecture:  Unknown/Multiple
 Type of failure:  Other     |            Test Case:
      Blocked By:            |             Blocking:
 Related Tickets:            |  Differential Rev(s):
       Wiki Page:            |
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Description changed by Tom:

@@ -1,1 +1,1 @@
- Prelude> 20^65-exp(65*log(20))
+ Prelude> 20^{65}-exp(65*log(20))

New description:

 Prelude> 20^{65}-exp(65*log(20))

 6.211571712111507e70


 Obviously, correct result is 0.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/12611#comment:2>
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