bug#10586: 23.3; cd in remote shell reset working directory to local home

[Alberto]

This bug report will be sent to the Free Software Foundation,
not to your local site managers!
Please write in English if possible, because the Emacs maintainers
usually do not have translators to read other languages for them.

Your report will be posted to the bug-gnu-emacs@gnu.org mailing list
and the gnu.emacs.bug news group, and at http://debbugs.gnu.org.

Please describe exactly what actions triggered the bug
and the precise symptoms of the bug.  If you can, give
a recipe starting from `emacs -Q':

Open a remote folder, e.g.
    C-x C-f /onan:bin
Open a remote shell there
    M-x shell
Check with pwd that working directory is remote
    M-x pwd
Execute in the shell cd
    > cd
Check with pwd that working directory is now _local_ home
    M-x pwd

After this happens the only way I found to fix the working directory is to kill
the shell buffer and open it again.

If Emacs crashed, and you have the Emacs process in the gdb debugger,
please include the output from the following gdb commands:
    `bt full' and `xbacktrace'.
For information about debugging Emacs, please read the file
/home/alin/Software/install/emacs-23.3/share/emacs/23.3/etc/DEBUG.


In GNU Emacs 23.3.1 (x86_64-unknown-linux-gnu, GTK+ Version 2.24.6)
 of 2011-12-12 on alin-ubuntu
Windowing system distributor `The X.Org Foundation', version 11.0.11004000
configured using `configure  '--prefix'
'/home/alin/Software/install/emacs-23.3' '--with-x-toolkit=gtk'
'--with-crt-dir=/usr/lib/x86_64-linux-gnu''

Important settings:
  value of $LC_ALL: nil
  value of $LC_COLLATE: nil
  value of $LC_CTYPE: nil
  value of $LC_MESSAGES: nil
  value of $LC_MONETARY: nil
  value of $LC_NUMERIC: nil
  value of $LC_TIME: nil
  value of $LANG: en_GB.utf8
  value of $XMODIFIERS: nil
  locale-coding-system: utf-8-unix
  default enable-multibyte-characters: t

Major mode: Shell

Minor modes in effect:
  shell-dirtrack-mode: t
  tooltip-mode: t
  mouse-wheel-mode: t
  tool-bar-mode: t
  menu-bar-mode: t
  file-name-shadow-mode: t
  global-font-lock-mode: t
  font-lock-mode: t
  blink-cursor-mode: t
  auto-encryption-mode: t
  auto-compression-mode: t
  line-number-mode: t
  transient-mark-mode: t

Recent input:
C-x C-f <backspace> <backspace> / o n a n : b i n <return>
M-x s h e <tab> <return> p w d <return> M-x p w d <return>
c d <return> M-x p w d <return> M-x <down-mouse-2>
<mouse-2> <return>

Recent messages:
Tramp: Opening connection for onan using scpc...
Tramp: Sending command `exec ssh -q   -o
ControlPath=/tmp/tramp.16372VjS.%r@%h:%p -o ControlMaster=yes -e none
onan'

Tramp: Waiting for prompts from remote shell
Tramp: Sending command `exec ssh -q   -o
ControlPath=/tmp/tramp.16372VjS.%r@%h:%p -o ControlMaster=yes -e none
onan'
Tramp: Found remote shell prompt on `onan'
Tramp: Opening connection for onan using scpc...done
Directory /scpc:onan:/home/alin/bin/
~
Directory /home/alin/

Load-path shadows:
None found.

Features:
(shadow sort mail-extr message sendmail ecomplete rfc822 mml easymenu
mml-sec mm-decode mm-bodies mm-encode mailcap mail-parse rfc2231 rfc2047
rfc2045 qp ietf-drums mailabbrev nnheader gmm-utils wid-edit mailheader
canlock sha1 hex-util hashcash mail-utils emacsbug ansi-color dired
tramp-imap assoc tramp-gw tramp-gvfs zeroconf url-util url-parse
url-vars mm-util mail-prsvr dbus xml tramp-fish tramp-smb tramp-cache
tramp-ftp tramp-cmds tramp regexp-opt auth-source gnus-util netrc
time-date advice help-fns advice-preload shell comint ring
password-cache format-spec tramp-compat trampver tooltip ediff-hook
vc-hooks lisp-float-type mwheel x-win x-dnd font-setting tool-bar dnd
fontset image fringe lisp-mode register page menu-bar rfn-eshadow timer
select scroll-bar mldrag mouse jit-lock font-lock syntax facemenu
font-core frame cham georgian utf-8-lang misc-lang vietnamese tibetan
thai tai-viet lao korean japanese hebrew greek romanian slovak czech
european ethiopic indian cyrillic chinese case-table epa-hook
jka-cmpr-hook help simple abbrev loaddefs button minibuffer faces
cus-face files text-properties overlay md5 base64 format env code-pages
mule custom widget hashtable-print-readable backquote
make-network-process dbusbind font-render-setting gtk x-toolkit x
multi-tty emacs)