#2432: type family panic: Coercion.splitCoercionKindOf
------------------------+---------------------------------------------------
Reporter: claus | Owner:
Type: bug | Status: new
Priority: normal | Component: Compiler (Type checker)
Version: 6.9 | Severity: normal
Keywords: | Testcase:
Architecture: Unknown | Os: Unknown
------------------------+---------------------------------------------------
as seen in #2146#comment:5, confirmed with `GHCi, version 6.9.20080709`
{{{
{-# LANGUAGE TypeFamilies #-}
type family F a :: * -> *
foo3 :: (F Int ~ fi, F Bool ~ fb, fi a ~ fb a) => a
foo3 = undefined
}}}
{{{
ghc.exe: panic! (the 'impossible' happened)
(GHC version 6.9.20080709 for i386-unknown-mingw32):
Coercion.splitCoercionKindOf
ghc-prim:GHC.Prim.left{(w) tc 34B} $co${tc a7j} [tv]
<pred>fi{tv a6W} [sk] ~ fb{tv a6X} [sk]
Please report this as a GHC bug: http://www.haskell.org/ghc/reportabug
}}}
--
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/2432>
GHC <http://www.haskell.org/ghc/>
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