Error in FileInputStream?

[reali]

One of the FileInputStream constructors is
implemented as follows:

public
FileInputStream(FileDescriptor fd) throws SecurityException
{
  // Hmmm, no other exception but this one to throw, but if the descriptor
  // isn't valid, we surely don't have "permission" to read from it.
  if (!fd.valid())
    throw new SecurityException("Invalid FileDescriptor");

  SecurityManager sm = System.getSecurityManager();
  if (sm != null)
    {
//      try
//        {
          //sm.checkRead(fd);
          throw new SecurityException("ffo");
//        }
//      catch (AccessControlException e)
//        {
//          throw new SecurityException(e.getMessage());
//        }
    }

  native_fd = fd.getNativeFD();
}


When the JVM boots, System.in is allocated using a file descriptor.
If the security manager is already installed, then an exception
is thrown.

Is there a reason, for assuming that the security manager is not
available at this point or is this only some forgotten code that,
by chance, nobody else but me run into?

-Patrik
--
Patrik Reali, address@hidden
http://www.inf.ethz.ch/personal/reali/
http://www.oberon.ethz.ch/native/