[GHC] #10176: Invalid core generated with GHC 7.10 RC3

[GHC]

#10176: Invalid core generated with GHC 7.10 RC3
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        Reporter:  NeilMitchell      |                   Owner:
            Type:  bug               |                  Status:  new
        Priority:  high              |               Milestone:  7.10.1
       Component:  Compiler          |                 Version:  7.10.1-rc3
      Resolution:                    |                Keywords:
Operating System:  Unknown/Multiple  |            Architecture:
 Type of failure:  None/Unknown      |  Unknown/Multiple
      Blocked By:                    |               Test Case:
 Related Tickets:                    |                Blocking:
                                     |  Differential Revisions:
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Comment (by hvr):

 Fwiw, I see GHC 7.8.4 producing similiar Core (with `-dsuppress-all
 -dsuppress-uniques`):

 {{{#!hs
 a =
   \ fun unit1 bool eta ->
     case bool of _ {
       False ->
         case fun unit1 of _ {
           False -> (# eta, () #);
           True -> case m of wild2 { }
         };
       True ->
         case hPutStr2 stdout shows3 True eta of _ { (# ipv, ipv1 #) ->
         case fun unit1 of _ {
           False -> (# ipv, () #);
           True -> case m of wild2 { }
         }
         }
     }
 }}}

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/10176#comment:4>
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