Today, I thought I had discovered a bug in ghc. Then I tried hbc
and Hugs, and they also rejected my program with the same error.
nhc98 alone accepts it without complaint. I looked up the Report,
and it seems that the program is indeed incorrect.
Quick quiz: without running this through a compiler, who can spot
the mistake? :-)
> module Main where
> import Char
> f x = y
> where
> y | isSpace x = True
> y | otherwise = False
> main = print (f 'x')
Regards,
Malcolm
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