ghc-6.0 compiler bug

Hi,

playing around with partial evaluation, 
I encountered the following bug:

65> ghc --make -fglasgow-exts -package haskell-src Main.hs -o Main 
-ddump-splices
Chasing modules from: Main.hs
Compiling Power            ( Power.hs, ./Power.o )
Compiling Main             ( Main.hs, ./Main.o )
ghc-6.0: panic! (the `impossible' happened, GHC version 6.0):
        nameModule x {- v a1BE -}

Please report it as a compiler bug to glasgow-haskell-bugs@xxxxxxxxxxx,
or http://sourceforge.net/projects/ghc/.
----------------------------------------------------------------------------------
module Power where

 import Language.Haskell.THSyntax

 pow :: ExpQ -> Int -> ExpQ
 pow x 0       = [| const 1 |]
 pow x n | n>0 = [| $x * $(pow x (n-1)) |]
----------------------------------------------------------------------------------
module Main where

 import Power (pow)

 main = let x = 2 :: Double
        in putStrLn (show ($(pow [|x|] 5)))
----------------------------------------------------------------------------------
Good luck
-- 
 Dr. Christoph Herrmann
 Teaching and Research Assistant 
 University of Passau, Germany 
 http://www.fmi.uni-passau.de/~herrmann