Qualified names in deriving

[Sigbjorn Finne (Intl Vendor)]

Hi,

loading the following module

module A where { data X = X deriving (Foo.Bar); }

produces

 ERROR "a.hs" (line 1): Unknown class "d78938" in derived instance

making it all a bit more real, and changing Foo.Bar to Prelude.Eq
(+ adding "import qualified Prelude"), produces a similar error msg.

--sigbjorn