[GHC] #13925: Panic!

[GHC]

#13925: Panic!
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           Reporter:  Deus           |             Owner:  (none)
               Type:  bug            |            Status:  new
           Priority:  normal         |         Milestone:
          Component:  Compiler       |           Version:  8.0.2
           Keywords:                 |  Operating System:  Linux
       Architecture:  x86_64         |   Type of failure:  Compile-time
  (amd64)                            |  crash or panic
          Test Case:                 |        Blocked By:
           Blocking:                 |   Related Tickets:
Differential Rev(s):                 |         Wiki Page:
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 Hi,
 I only use haskell for an asingement so I don't have any clues, but ghc
 told me to do a bug report:
 [1 of 1] Compiling Main             ( plant.hs, plant.o )
 ghc: panic! (the 'impossible' happened)
   (GHC version 8.0.2 for x86_64-unknown-linux):
         initTc: unsolved constraints
   WC {wc_insol =
         [W] true_a1Gg :: t_a1Gf[tau:1] (CHoleCan: true)
         [W] false_a1Gj :: t_a1Gi[tau:1] (CHoleCan: false)
         [W] true_a1Qq :: t_a1Qp[tau:1] (CHoleCan: true)}

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/13925>
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