Here my ssh output in verbose mode :
$this->bbcode_second_pass_code('', '
root@192.168.1.4's password:
debug2: we sent a password packet, wait for reply
debug1: Authentication succeeded (password).
Authenticated to 192.168.1.4 ([192.168.1.4]:22).
debug1: channel 0: new [client-session]
debug2: channel 0: send open
debug1: Requesting no-more-sessions@openssh.com
debug1: Entering interactive session.
debug2: callback start
debug2: client_session2_setup: id 0
debug2: fd 3 setting TCP_NODELAY
debug2: channel 0: request pty-req confirm 1
debug1: Sending environment.
debug1: Sending env LC_PAPER = fr_BE.UTF-8
debug2: channel 0: request env confirm 0
debug1: Sending env LC_ADDRESS = fr_BE.UTF-8
debug2: channel 0: request env confirm 0
debug1: Sending env LC_MONETARY = fr_BE.UTF-8
debug2: channel 0: request env confirm 0
debug1: Sending env LC_NUMERIC = fr_BE.UTF-8
debug2: channel 0: request env confirm 0
debug1: Sending env LC_TELEPHONE = fr_BE.UTF-8
debug2: channel 0: request env confirm 0
debug1: Sending env LC_MESSAGES = fr_FR.UTF-8
debug2: channel 0: request env confirm 0
debug1: Sending env LC_COLLATE = fr_FR.UTF-8
debug2: channel 0: request env confirm 0
debug1: Sending env LC_IDENTIFICATION = fr_BE.UTF-8
debug2: channel 0: request env confirm 0
debug1: Sending env LANG = fr_BE.UTF-8
debug2: channel 0: request env confirm 0
debug1: Sending env LC_MEASUREMENT = fr_BE.UTF-8
debug2: channel 0: request env confirm 0
debug1: Sending env LC_CTYPE = fr_FR.UTF-8
debug2: channel 0: request env confirm 0
debug1: Sending env LC_TIME = fr_BE.UTF-8
debug2: channel 0: request env confirm 0
debug1: Sending env LC_NAME = fr_BE.UTF-8
debug2: channel 0: request env confirm 0
debug2: channel 0: request shell confirm 1
debug2: callback done
debug2: channel 0: open confirm rwindow 0 rmax 32768
debug2: channel_input_status_confirm: type 99 id 0
debug2: PTY allocation request accepted on channel 0
debug2: channel 0: rcvd adjust 2097152
debug2: channel_input_status_confirm: type 99 id 0
debug2: shell request accepted on channel 0
')
And then... My ssh client (on ubuntu 12.04) is crashed.