Tramp cannot access files via sudo

After setting debug-on-quit, I got a backtrace, printed below (sorry, I had trouble copying the special characters in the line which starts with "byte-code").

I've attached the contents of the Tramp debug buffer with `tramp-verbose' set to 6.

Workaround: everything works if I set `tramp-methods' (net/tramp.el) so that sudo uses "/bin/bash --norc" rather than "/bin/sh". It appears that Tramp is doing things that work in bash but not in dash.

----

Backtrace:

Debugger entered--Lisp error: (quit)
  accept-process-output(#<process *tramp/sudo <email address hidden>*> 1 nil)
  byte-code("..." [timeout with-timeout-tag with-timeout-timer with-timeout-timers proc timeout-msecs run-with-timer 1 nil with-timeout-handler accept-process-output with-timeout-value] 6)
  tramp-accept-process-output(#<process *tramp/sudo <email address hidden>*> 1)
  tramp-wait-for-regexp(#<process *tramp/sudo <email address hidden>*> nil "^[^$\n]*///c73bab5635304c1f929c0ec3ee7e6764
?$")
  tramp-wait-for-output(#<process *tramp/sudo <email address hidden>*>)
  tramp-send-command(["sudo" "root" "phil.mit.edu" "/etc/apt/sources.list"] "PROMPT_COMMAND=''; PS1='\n///c73bab5635304c1f929c0ec3ee7e6764\n'; PS2=''; PS3=''" t)
  tramp-open-connection-setup-interactive-shell(#<process *tramp/sudo <email address hidden>*> ["sudo" "root" "phil.mit.edu" "/etc/apt/sources.list"])
  tramp-maybe-open-connection(["sudo" "root" "phil.mit.edu" "/etc/apt/sources.list"])
  tramp-send-command(["sudo" "root" "phil.mit.edu" "/etc/apt/sources.list"] "test 0 2>/dev/null; echo tramp_exit_status $? ")
  tramp-send-command-and-check(["sudo" "root" "phil.mit.edu" "/etc/apt/sources.list"] "test 0")
  tramp-get-test-command(["sudo" "root" "phil.mit.edu" "/etc/apt/sources.list"])
  tramp-run-test("-d" "/sudo:<email address hidden>:/etc/apt/sources.list")
  tramp-handle-file-directory-p("/sudo:<email address hidden>:/etc/apt/sources.list")
  apply(tramp-handle-file-directory-p "/sudo:<email address hidden>:/etc/apt/sources.list")
  tramp-sh-file-name-handler(file-directory-p "/sudo:<email address hidden>:/etc/apt/sources.list")
  apply(tramp-sh-file-name-handler file-directory-p "/sudo:<email address hidden>:/etc/apt/sources.list")
  tramp-file-name-handler(file-directory-p "/sudo:<email address hidden>:/etc/apt/sources.list")
  file-directory-p("/sudo:<email address hidden>:/etc/apt/sources.list")
  find-file-noselect("/sudo::/etc/apt/sources.list" nil nil t)
  find-file("/sudo::/etc/apt/sources.list" t)
  call-interactively(find-file)

Closing; problem seems to have gone away with most recent emacs-snapshot on Hardy.

This issue seems to be present in Jaunty version of emacs-snapshot. Opening new file through C-X f /sudo::/somefile hangs after inputting password for sudo with message "Tramp: Waiting for prompts from remote shell".

Tried to apply workaround proposed by Phil Sung with following steps, but it didn't work:

$ cd /usr/share/emacs/23.0.91/lisp/net
$ sudo gunzip tramp.el.gz
Changed tramp-remote-sh for sudo command to "/bin/bash --norc" and then byte-compiled it with:
$ sudo emacs -batch -f batch-byte-compile tramp.el

Similar woes. I am running Ubuntu 9.04, emacs-snapshot, and the single line
"(require 'tramp)" in my .emacs brings

Warning (initialization): An error occurred while loading `/home/allenk/.emacs':

Invalid read syntax: invalid multibyte form

then with emacs --debug-init,

͂͂͂Debugger entered--Lisp error: (invalid-read-syntax "invalid multibyte form")
  require(comint)
  byte-code("..." [require comint custom-declare-group shell nil "Running shell from within Emacs buffers." :group processes unix shell-directories "Directory support in shell mode." shell-faces "Faces in shell buffers."] 8)
  require(shell)
  byte-code("..." [load-in-progress current-message message "Loading tramp..." require trampver add-hook tramp-unload-hook (lambda nil (when ... ...)) tramp-compat (lambda nil (when ... ...)) format-spec password-cache nil noerror password shell advice auth-source autoload tramp-get-file-property "tramp-cache" tramp-set-file-property tramp-flush-file-property tramp-flush-directory-property tramp-get-connection-property tramp-set-connection-property tramp-flush-connection-property tramp-parse-connection-properties (lambda nil (when ... ...))] 4)
  require(tramp)
  eval-buffer(#<buffer *load*> nil "/home/allenk/.emacs" nil t) ; Reading at buffer position 402
  load-with-code-conversion("/home/allenk/.emacs" "/home/allenk/.emacs" t t)
  load("~/.emacs" t t)
  #[nil "..." [init-file-user system-type user-init-file-1 user-init-file otherfile source ms-dos "~" "/_emacs" windows-nt directory-files nil "^\\.emacs\\(\\.elc?\\)?$" "~/.emacs" "^_emacs\\(\\.elc?\\)?$" "~/_emacs" "/.emacs" t load expand-file-name "init" file-name-as-directory "/.emacs.d" file-name-extension "elc" file-name-sans-extension ".el" file-exists-p file-newer-than-file-p message "Warning: %s is newer than %s" sit-for 1 "default" alt inhibit-default-init inhibit-startup-screen] 7]()
  command-line()
  normal-top-level()

where I removed some of the \300s etc. I tried Phil Sung's workaround, also to no effect.

Just to say: uninstalling older emacsen and reinstalling emacs-snapshot didn't help either.

Emacs-24.3.50.1 installed from "http://emacs.naquadah.org/" on Debian.

During sudoing with tramp "/sudo::" it asks for a password with a prompt like:
"Password for /sudo:root@mynetworkhostname:"

So tramp is trying to ssh to remote host with name "mynetworkhostname" as this is not localhost. This operation fails as I don't have sshd running.

My fix is to set "tramp-default-host" to localhost:
(setq tramp-default-host "localhost")

So it works now.

Previous solution is broken. It helped to use "/su::" instead of sudo.