GHC 5.0 fails test tc109.hs
Compiler sez:
Illegal instance declaration for `P b'
(There must be at least one non-type-variable in the
instance head)
despite there being ample type-vars in the head ;-)
Trac metadata
Trac field | Value |
---|---|
Version | None |
Type | Bug |
TypeOfFailure | OtherFailure |
Priority | normal |
Resolution | ResolvedInvalid |
Component | Compiler (Type checker) |
Test case | |
Differential revisions | |
BlockedBy | |
Related | |
Blocking | |
CC | |
Operating system | |
Architecture |