My guess is that you are having an out-of-date .o of .hi file in your working directory. Clean it up and try again.
All the best, Daan. ----- Original Message ----- From: "Matthew Donadio" <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]> Sent: Monday, January 27, 2003 10:34 PM Subject: Bizarre Haskell Problem > Hi all, > > I am currently a having a bizarre Haskell problem, and was wondering if > anyone had any suggestions. > > This is a snippet from a source file: > > > foo n = [ a ^* i | i <- [0..(n-2)] ] > > where i ^* j = (i ^ j) `mod` n > > a = generator n > > > rader :: Array Int (Complex Double) -> Int -> Array Int (Complex Double) > > rader f n = foo a n -- DEBUG: should be f' > > where h = listArray (0,n-2) [ f!(a ^* (n-(1+n'))) | n' <- [0..(n-2)] ] > > g = listArray (0,n-2) [ w (a ^* n') | n' <- [0..(n-2)] ] > > f' = array (0,n-1) ((0, sum [ f!i | i <- [0..(n-1)] ]) : [ (a ^* i, f!0 >+ sum [ h!j * g!((i-j)`mod`(n-1)) | j <- [0..(n-2)] ]) | i <- [0..(n-2)] ]) > > w i = cis (-2 * pi * fromIntegral i / fromIntegral n) > > i ^* j = (i ^ j) `mod` n > > a = generator n > > Under hugs and ghc, calling 'foo' and 'rader' with the proper arguments > will give me different results under certain circumtances. > > In rader, n is the number of elements in the array. If n is < 23, then > everything is OK. If n >= 23, then rader returns the wrong result. The > bizarre thing is that if I comment out the definitions of h and f' in > rader, then it returns the correct results. Hugs also give different > reduction counts depending on whether h and f' are commented out or > not. If I add any more definitions that reference f, then rader > misbehaves. > > What is even more bizarre is that if I copy everything into a separate > file, then it work for all n. > > Any suggestions or hints, other than just use a separate file? Separate > files isn't really an option, because the above is simplified a bit, and > the final version would have mutually recursive modules, which hugs > can't handle. > > Thanks. > > -- > Matthew Donadio ([EMAIL PROTECTED]) > _______________________________________________ > Haskell mailing list > [EMAIL PROTECTED] > http://www.haskell.org/mailman/listinfo/haskell > > _______________________________________________ Haskell mailing list [EMAIL PROTECTED] http://www.haskell.org/mailman/listinfo/haskell