LongTraversables obtained from UnmanagedResources seem to load all data

[jesseeichar]

LongTraversables obtained from UnmanagedResources seem to load all data and are usable even after stream is closed. It should not load data until needed and if closed should throw an exception

import scalax.io.JavaConverters._
val fin = new FileInputStream("somefile.txt")
val chars = fin.asUnmanagedInput.chars
chars.head
fin.close
chars.head

last line should be an exception but isn't