Tim Sauerwein <tim at galconn.com> wrote,
[..]
> panic! (the `impossible' happened):
> tcLookupGlobalValue: <THIS>.PrelIOBase.returnIO{-0B,s-}
The problem seems neither to appear in the CVS HEAD (4.11)
nor in the forthcoming 4.08.2 release.
So, you may either want to wait for the release of 4.08.2 or
build yourself a new GHC from CVS.
Cheers,
Manuel