[GHC] #13736: GHC panic with DataKinds and TypeOperators

21 May 2017


      #13736: GHC panic with DataKinds and TypeOperators
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           Reporter:  turion         |             Owner:  (none)
               Type:  bug            |            Status:  new
           Priority:  normal         |         Milestone:
          Component:  Compiler       |           Version:  8.0.2
           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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 The following program causes a GHC panic:
 {{{#!hs
 {-# LANGUAGE DataKinds #-}
 {-# LANGUAGE TypeOperators #-}
 {-# LANGUAGE KindSignatures #-}
 import GHC.TypeLits

 data Proxy (n :: Nat) = Proxy

 data Foo a = Foo a

 foo :: Foo (Proxy (2 * 2))
 foo = Foo _
 }}}

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Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/13736
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