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 |