[GHC] #14636: GHC Panic

[GHC]

#14636: GHC Panic
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           Reporter:  Iceland_jack   |             Owner:  (none)
               Type:  bug            |            Status:  new
           Priority:  normal         |         Milestone:
          Component:  Compiler       |           Version:  8.2.2
           Keywords:                 |  Operating System:  Unknown/Multiple
       Architecture:                 |   Type of failure:  None/Unknown
  Unknown/Multiple                   |
          Test Case:                 |        Blocked By:
           Blocking:                 |   Related Tickets:
Differential Rev(s):                 |         Wiki Page:
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 {{{
 $ ghci -ignore-dot-ghci -XPolyKinds -XDataKinds
 GHCi, version 8.3.20171208: http://www.haskell.org/ghc/  :? for help
 Prelude> import Data.Proxy
 Prelude Data.Proxy> data ID :: a -> a -> *
 Prelude Data.Proxy> :kind (Proxy :: _ ID)
 ghc-stage2: panic! (the 'impossible' happened)
   (GHC version 8.3.20171208 for x86_64-unknown-linux):
         piResultTy
   k_a1yY[tau:1]
   ID
   Call stack:
       CallStack (from HasCallStack):
         callStackDoc, called at compiler/utils/Outputable.hs:1144:37 in
 ghc:Outputable
         pprPanic, called at compiler/types/Type.hs:951:35 in ghc:Type

 Please report this as a GHC bug:  http://www.haskell.org/ghc/reportabug

 Prelude Data.Proxy>
 }}}

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/14636>
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