Kind polymorphism fails with recursive type definition using different kind
{-# LANGUAGE GADTs, PolyKinds #-}
module Bug where
data R t where
MkR :: R f -> R (f ())
results in
Bug.hs:4:26:
Kind mis-match
The first argument of `R' should have kind `* -> k0',
but `f ()' has kind `k0'
In the type `R (f ())'
In the definition of data constructor `MkR'
In the data type declaration for `R'
Trac metadata
Trac field | Value |
---|---|
Version | 7.4.1 |
Type | Bug |
TypeOfFailure | OtherFailure |
Priority | normal |
Resolution | Unresolved |
Component | Compiler (Type checker) |
Test case | |
Differential revisions | |
BlockedBy | |
Related | |
Blocking | |
CC | |
Operating system | |
Architecture |