| otherwise = error $ "writeMPArr: out of bounds parallel array index; " ++
"idx = " ++ show (I# i#) ++ ", arr len = "
++ show (I# n#)
| otherwise = error $ "writeMPArr: out of bounds parallel array index; " ++
"idx = " ++ show (I# i#) ++ ", arr len = "
++ show (I# n#)