#2817: Template Haskell conversion fails with "malformed type"
-------------------------------+--------------------------------------------
Reporter: simonpj | Owner:
Type: bug | Status: new
Priority: normal | Milestone: 6.10.2
Component: Compiler | Version: 6.10.1
Severity: normal | Keywords:
Difficulty: Unknown | Testcase:
Os: Unknown/Multiple | Architecture: Unknown/Multiple
-------------------------------+--------------------------------------------
Nicholas Frisby writes: When using Template Taskell (via Derive) to
generate this (exact) instance:
{{{
instance Foldable ((->) Int) => Foldable
Data.Derivable.InterpreterLib.Test.List
where foldMap f (Cons x0 x1) = (const mempty Cons `mappend` foldMap
f x0)
`mappend` foldMap f x1
foldMap f (Nil) = const mempty Nil
}}}
I realize the context is unsatisfiable. My issue, is that I can't even
reach that "challenge". I get this error instead:
{{{
Malformed type AppT ArrowT (ConT GHC.Base.Int)
When splicing generated code into the program
}}}
--
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/2817>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler
_______________________________________________
Glasgow-haskell-bugs mailing list
[email protected]
http://www.haskell.org/mailman/listinfo/glasgow-haskell-bugs
