sort -n -u buggy ???

[Arnauld Michelizza]

Sort command seems to be buggy :

$ sort --version
sort (GNU coreutils) 5.94
Copyright (C) 2006 Free Software Foundation, Inc.
This is free software.  You may redistribute copies of it under the terms of
the GNU General Public License <http://www.gnu.org/licenses/gpl.html>.
There is NO WARRANTY, to the extent permitted by law.
Written by Mike Haertel and Paul Eggert.

$ cat foo
83.154.241.254
83.155.32.254
83.155.65.254

$ sort -n -u foo
83.154.241.254
83.155.32.254


Best regards,

Arnauld