On Thu, 2011-04-21 at 23:56 +0200, Nick Smallbone wrote: > "larry.liuxinyu" <liuxiny...@gmail.com> writes: > > > Somebody told me that: > > Eduard Sergeev • BTW, more recent QuickCheck (from Haskell Platform > > 2011.2.0.X - contains QuickCheck-2.4.0.1) seems to identifies the > > problem correctly: > > > > *** Failed! Falsifiable (after 3 tests and 2 shrinks): > > [0,1] > > False > > I don't think this can be true: the problem occurs in GHCi and there's > no way for QuickCheck to detect it. And when I tested it I got the same > problem. There must be some difference between the properties you both > tested... > > Nick >
There was an additional class contrain (Num a). Num default to Int IIRC. Regards
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