ghc-6.0 compiler bug

[Simon Peyton-Jones]

Yes, this is a known bug, but thank you for reporting it anyway.  I'm
going to fix it as part of my next sweep though.

I enclose a message that gives a workaround.

Simon

| -----Original Message-----
| From: glasgow-haskell-bugs-admin at haskell.org
[mailto:glasgow-haskell-bugs-admin at haskell.org] On
| Behalf Of Ch. A. Herrmann
| Sent: 05 June 2003 14:28
| To: glasgow-haskell-bugs at haskell.org
| Subject: 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 at haskell.org,
| 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
| _______________________________________________
| Glasgow-haskell-bugs mailing list
| Glasgow-haskell-bugs at haskell.org
| http://www.haskell.org/mailman/listinfo/glasgow-haskell-bugs


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