# Open the same file again.
	# The original path is reused, therefore the reopened file can be a different file.
	#
	#     var f = new FileReader.open("/etc/issue")
	#     var l = f.read_line
	#     f.reopen
	#     assert l == f.read_line
	fun reopen
	do
		var fl = _file
		if fl != null and not fl.address_is_null then close
		last_error = null
		_file = new NativeFile.io_open_read(path.as(not null).to_cstring)
		if _file.as(not null).address_is_null then
			last_error = new IOError("Cannot open `{path.as(not null)}`: {sys.errno.strerror}")
			return
		end
	end