[GHC] #7852: panic: kindFunResult ghc-prim:GHC.Prim.*{(w) tc 34d}

[GHC]

#7852: panic: kindFunResult ghc-prim:GHC.Prim.*{(w) tc 34d}
----------------------------------------+-----------------------------------
    Reporter:  igloo                    |       Owner:                  
        Type:  bug                      |      Status:  new             
    Priority:  high                     |   Milestone:  7.8.1           
   Component:  Compiler (Type checker)  |     Version:  7.6.3           
    Keywords:                           |          Os:  Unknown/Multiple
Architecture:  Unknown/Multiple         |     Failure:  None/Unknown    
  Difficulty:  Unknown                  |    Testcase:                  
   Blockedby:                           |    Blocking:                  
     Related:                           |  
----------------------------------------+-----------------------------------
 This code:
 {{{
 f :: (Num Int => Num) () => ()
 f = undefined
 }}}
 make ghc panic:
 {{{
 $ ghci q.hs
 GHCi, version 7.7.20130421: http://www.haskell.org/ghc/  :? for help
 Loading package ghc-prim ... linking ... done.
 Loading package integer-gmp ... linking ... done.
 Loading package base ... linking ... done.
 [1 of 1] Compiling Main             ( q.hs, interpreted )
 ghc-stage2: panic! (the 'impossible' happened)
   (GHC version 7.7.20130421 for x86_64-unknown-linux):
         kindFunResult ghc-prim:GHC.Prim.*{(w) tc 34d}

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

 >
 }}}

-- 
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/7852>
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