[Haskell-cafe] Different semantics in "identical" do statement?

[staafmeister]

Daniel Peebles wrote:
> 
> I vaguely remember on IRC someone pointing out that the Parsec monad
> broke one of the laws. I think return _|_ >> x === _|_ which could be
> causing your problem. I may be wrong though.
> 
> 

This could very well be it. I use lazy eval to construct a function that
returns
its own argument (that is you supply the return value of the func as its
arg).

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