[GHC] #12866: GHC internal error while building darcsden

[GHC]

#12866: GHC internal error while building darcsden
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        Reporter:  simonmic          |                Owner:
            Type:  bug               |               Status:  new
        Priority:  normal            |            Milestone:
       Component:  Compiler          |              Version:  8.0.1
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
       Wiki Page:                    |
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Comment (by simonmic):

 View code at http://hub.darcs.net/simon/darcsden-
 ghc8/browse/src/DarcsDen/Backend/Transient.hs#10 :
 {{{
  9  type BT bt = (BackendTransient bt, ?backendTransient :: bt)
 10  type BTIO bt = (BT bt, MonadIO (BackendTransientM bt))
 }}}

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/12866#comment:1>
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