Failed kind inference in class declaration (regression error)
Consider the following code:
{-# LANGUAGE MultiParamTypeClasses
#-}
class Foo a b
class Foo a b => Bar a b where
baz :: a b
This compiles fine in 7.2.1 but fails in 7.4.1-rc1, with the following error:
Sandbox.hs:7:12:
`a' is applied to too many type arguments
In the type `a b'
In the class declaration for `Bar'
Trac metadata
Trac field | Value |
---|---|
Version | 7.4.1-rc1 |
Type | Bug |
TypeOfFailure | OtherFailure |
Priority | normal |
Resolution | Unresolved |
Component | Compiler (Type checker) |
Test case | |
Differential revisions | |
BlockedBy | |
Related | |
Blocking | |
CC | |
Operating system | |
Architecture |