Problem with happy

[Richard A. O'Keefe]

ghc -cpp -fglasgow-exts -O    -c IntSet.lhs -o IntSet.o -osuf o

panic! (the `impossible' happened):
        primCode:Word2IntegerOp

Please report it as a compiler bug to [EMAIL PROTECTED]

Source:  happy 1.6 downloaded from haskell.org last week.
Host: SPARCstation 5 running Solaris 2.7
Compiler: GHC 3.02 patchlevel 0