[GHC] #8661: Segfault on System.Time during validate

[GHC]

#8661: Segfault on System.Time during validate
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        Reporter:  Fuuzetsu          |            Owner:
            Type:  bug               |           Status:  new
        Priority:  normal            |        Milestone:
       Component:  Compiler          |          Version:  7.7
      Resolution:                    |         Keywords:
Operating System:  Unknown/Multiple  |     Architecture:  x86
 Type of failure:  None/Unknown      |       Difficulty:  Unknown
       Test Case:                    |       Blocked By:
        Blocking:                    |  Related Tickets:
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Comment (by nomeata):

 I still observe a weridness, ghc spins for a long time trying to compile
 System.Time. According to `-v`, it is somewhere in the desugarer – is that
 possibly related to this ticket or did I hit a different, possibly local,
 issue?

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/8661#comment:4>
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