[Haskell-beginners] Question regarding error messages

[Choi Waikit]

Hi guys,

I have difficulty understanding how GHC determines what kind of error
message to return. Could you help explain a bit ? Thanks !

The code can be accessed here <http://lpaste.net/356325>

My question is
Why does calling `settleDown 9` return different error message from
`settleDown "sting"` ?

Thanks,
David
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