[Haskell-cafe] STUArray's newArray_ breaks referential transparency

[Stefan O'Rear]

newArray_ allocates an array full of garbage.

> import Control.Monad.ST
> import Data.Array.ST
> import Data.Array
> 
> tickle :: Int
> tickle = runST (do {
>      x <- newArray_ (0,100) ;
>      (readArray :: STUArray s Int Int -> Int -> ST s Int) x 3
>    })