[Haskell-cafe] What does "1 = 2" mean in Haskell?

[Alexey Muranov]

On Monday, February 27, 2017 at 12:35:26 AM UTC+1, o... at cs.otago.ac.nz 
wrote:
>
> >
> > Furthermore, you would not want
> > ```
> > main = let 1 = 2 in print "foo"
> > ```
> > to error, since the pattern match is unused, and haskell is a lazy
> > language.
>
> That's not at all clear.  In fact, I believe this thread exists
> because the OP's daughter expected that it WOULD raise an error.
>

 I think i agree with this. IMO it should raise an error as well as

  (\1 -> "hello") 2

does.

Alexey.
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