[GHC] #8747: GHC 7.4.1 ghc: panic! (the 'impossible' happened)

[GHC]

#8747: GHC 7.4.1 ghc: panic! (the 'impossible' happened)
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        Reporter:  codygman    |            Owner:
            Type:  bug         |           Status:  closed
        Priority:  normal      |        Milestone:
       Component:  GHCi        |          Version:  7.4.1
      Resolution:  duplicate   |         Keywords:
Operating System:  Linux       |     Architecture:  x86_64 (amd64)
 Type of failure:  GHCi crash  |       Difficulty:  Unknown
       Test Case:              |       Blocked By:
        Blocking:              |  Related Tickets:  #5961
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Changes (by nomeata):

 * status:  new => closed
 * resolution:   => duplicate
 * related:   => #5961


Comment:

 This is a duplicate of #5961 and fixed in GHC 7.6. Make sure you write
 `deriving (Show)`!

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/8747#comment:1>
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