>
> During compilation of the enclosed module, the following happened:
>
> panic! (the `impossible' happened):
> tcInstType:1
>
> Herewith reported as a GHC 2.04 bug.
>
Here's what I get when compiling it
foo$ $ghc/driver/ghc -c -noC guiv.hs
guiv.hs:29: The type ``[[PrelBase.Char]]'' cannot be used as an instance
type.
foo$
which sounds about right,
foo$ fgrep "[[Char]]" guiv.hs
instance GUIValue a => GUIValue [[Char]] where
odd instance decl - is this really the file that shows up the bug?
--Sigbjorn
