dodgy case of unboxed tuple type

The following program reports

c:\ghc\ghc-5.02\bin\ghc: panic! (the `impossible' 
happened, GHC version 5.02):
        cgEvalAlts: dodgy case of unboxed tuple type

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

---------------

module Main where

import PrelBase
import PrelGHC

main :: IO ()
main = let f = int2Integer# 0# in putStrLn ""

----------------

Trac metadata

Trac field	Value
Version	5.02
Type	Bug
TypeOfFailure	OtherFailure
Priority	normal
Resolution	ResolvedFixed
Component	Compiler
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dodgy case of unboxed tuple type