[Haskell-cafe] using an external application

[Jules Bean]

> Can you please give me some hint to solve this problem?
> I'm a beginning haskell developer and I'm still a bit confused
> by the IO monad.

Other people have explained to the OP why unsafe lazy IO is breaking his 
code.

Yet another piece of evidence, in my opinion, that 
unsafe-lazy-by-default is the wrong basic API. Provide that API as an 
option, sure. But as a default? Not IMO.

Jules