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{-# LANGUAGE UnboxedTuples #-}
{-# LANGUAGE MagicHash #-}
module Main where
import GHC.Exts
import GHC.IO
main :: IO ()
main = do
IO $ \s0 ->
case newByteArray# 7# s0 of
(# s1, marr #) -> case unsafeFreezeByteArray# marr s1 of
(# s2, arr #) -> (# copyByteArray# arr 3# marr 0# 4# s2, () #)
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