Browsing RealWorld broken

[Ralf Hinze]

> Here is another one: the case for foreign declarations seems to miss
> in ghc/compiler/ghci/InteractiveUI.hs:showDecl:
> 
> > ./bin/ghci
>    ___         ___ _
>   / _ \ /\  /\/ __(_)
>  / /_\// /_/ / /  | |      GHC Interactive, version 6.3, for Haskell 98.
> / /_\\/ __  / /___| |      http://www.haskell.org/ghc/
> \____/\/ /_/\____/|_|      Type :? for help.
> 
> Loading package base ... linking ... done.
> Prelude> :i GHC.Base.RealWorld
> *** Exception: ghci/InteractiveUI.hs:(505,0)-(555,49): Non-exhaustive patterns in function showDecl

Well, it should be fairly obvious that you cannot
browse the real world.