#6093: Kind polymorphism fails with recursive type definition using different
kind
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Reporter: Ashley Yakeley | Owner:
Type: bug | Status: closed
Priority: normal | Milestone:
Component: Compiler (Type checker) | Version: 7.6.1
Resolution: fixed | Keywords:
Os: Unknown/Multiple | Architecture: Unknown/Multiple
Failure: GHC rejects valid program | Difficulty: Unknown
Testcase: polykinds/T6093 | Blockedby:
Blocking: | Related:
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Changes (by Ashley Yakeley):
* status: new => closed
* resolution: => fixed
Comment:
OK, I see the problem. This compiles:
{{{
data R :: k -> * where
MkR :: R f -> R (f ())
}}}
But this doesn't:
{{{
data R (t :: k) where
MkR :: R f -> R (f ())
}}}
This is a different bug, and not so serious if you know the work-around.
--
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/6093#comment:12>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler
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