[GHC] #7887: panic when playing with pipes

[GHC]

#7887: panic when playing with pipes
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    Reporter:  bfr               |        Owner:                  
        Type:  bug               |       Status:  closed          
    Priority:  normal            |    Component:  Compiler        
     Version:  7.6.3             |   Resolution:  fixed           
    Keywords:                    |           Os:  Unknown/Multiple
Architecture:  Unknown/Multiple  |      Failure:  None/Unknown    
   Blockedby:                    |     Blocking:                  
     Related:                    |  
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Comment(by bfr):

 Thanks, I am glad it's been fixed. Is there a chance the fix will be
 backported to the STABLE branch (i.e. 6.7.x)?

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Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/7887#comment:4>
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