#7238: class methods with associated equality constraints panic
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Reporter: dmwit | Owner:
Type: bug | Status: new
Priority: normal | Component: Compiler
Version: 7.6.1 | Keywords:
Os: Linux | Architecture: x86_64 (amd64)
Failure: Compile-time crash | Testcase:
Blockedby: | Blocking:
Related: |
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The following file causes a panic ("getEqPredTys"):
{{{
{-# LANGUAGE ConstraintKinds, TypeFamilies #-}
import GHC.Exts
class Pair p where
type Ctxt p a :: Constraint
l :: Ctxt p a => p a -> a
data Unit a = Unit
instance Pair Unit where
type Ctxt Unit a = a ~ ()
l _ = ()
}}}
--
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/7238>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler
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