[GHC] #9140: Unboxed tuples fails in GHCi (7.8.2)

[GHC]

#9140: Unboxed tuples fails in GHCi (7.8.2)
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        Reporter:  osa1              |            Owner:  archblob
            Type:  bug               |           Status:  new
        Priority:  normal            |        Milestone:
       Component:  GHCi              |          Version:  7.8.2
      Resolution:                    |         Keywords:
Operating System:  Unknown/Multiple  |     Architecture:  Unknown/Multiple
 Type of failure:  GHCi crash        |       Difficulty:  Unknown
       Test Case:                    |       Blocked By:
        Blocking:                    |  Related Tickets:
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Comment (by archblob):

 I have attached a fix that validates and I think it's correct, but it
 should be checked first as there maybe be something I have missed.I have
 ventured far deeper than I'm comfortable at the moment.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/9140#comment:3>
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