[GHC] #4229: relatively simple test case for "internal error: PAP object entered!" on GHC 6.12.3

[GHC]

#4229: relatively simple test case for "internal error: PAP object entered!" on
GHC 6.12.3
---------------------------------+------------------------------------------
    Reporter:  carlhowells       |        Owner:              
        Type:  bug               |       Status:  new         
    Priority:  high              |    Milestone:  6.14.1      
   Component:  Compiler          |      Version:  6.12.3      
    Keywords:                    |     Testcase:              
   Blockedby:                    |   Difficulty:              
          Os:  Unknown/Multiple  |     Blocking:              
Architecture:  Unknown/Multiple  |      Failure:  None/Unknown
---------------------------------+------------------------------------------

Comment(by lilac):

 This also occurs on GHC version 6.12.1 for x86_64_unknown_linux, in case
 that helps narrow it down... The code passes core lint but fails STG lint.

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Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/4229#comment:4>
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