[GHC] #13380: raiseIO# result looks wrong

[GHC]

#13380: raiseIO# result looks wrong
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        Reporter:  dfeuer            |                Owner:  (none)
            Type:  bug               |               Status:  new
        Priority:  normal            |            Milestone:  8.2.1
       Component:  Compiler          |              Version:  8.1
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  Other             |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
       Wiki Page:                    |
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Comment (by dfeuer):

 @rwbarton, no, I understood that just fine. The trouble is that I don't
 think it's valid to analyze that as bottom when applied to three
 arguments, because then we lose the perfectly well-defined ''action'' of
 throwing a precise exception. Instead of performing that action, we can
 end up throwing an imprecise exception evaluating something we have no
 business evaluating.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/13380#comment:3>
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