23.0.50; ido-make-file-list error taking substring of ""

23.0.50; ido-make-file-list error taking substring of ""

[Trent W. Buck]

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[Please CC me; I'm not subscribed to the list.]

Invoking emacs thusly:

emacs -Q -nw  -eval '(load "ido.el")'  -f ido-mode  -f toggle-debug-on-error  /sudo::/  -eval "(call-interactively 'ido-find-file)"

causes the following backtrace.  The immediate problem is
`ido-make-file-list' trying to take the substring [0,1] of an empty
string from its local variable `ido-temp-list'.  The same problem
seems to occur for other TRAMP methods.

This is a duplicate of http://article.gmane.org/gmane.emacs.devel/87509

Debugger entered--Lisp error: (args-out-of-range "" 0 1)
  substring("" 0 1)
  (string-equal (substring x 0 1) ".")
  (if (string-equal (substring x 0 1) ".") x)
  (lambda (x) (if (string-equal ... ".") x))("")
  mapcar((lambda (x) (if (string-equal ... ".") x)) ("" "bin/" "boot/" "dev/" "etc/" "home/" "initrd/" "initrd.img" "lib/" "lost+found/" "media/" "mnt/" "opt/" "proc/" "root/" "sbin/" "srv/" "sys/" "tmp/" "usr/" "var/" "vmlinuz"))
  (delq nil (mapcar (lambda ... ...) ido-temp-list))
  (ido-to-end (delq nil (mapcar ... ido-temp-list)))
  (let ((ido-temp-list ...)) (setq ido-temp-list (sort ido-temp-list ...)) (unless (ido-is-tramp-root ido-current-directory) (let ... ...)) (ido-to-end (delq nil ...)) (if (and default ...) (if ... ... ... ...)) (when ido-show-dot-for-dired (setq ido-temp-list ...) (setq ido-temp-list ...)) (run-hooks (quote ido-make-file-list-hook)) ido-temp-list)
  ido-make-file-list(nil)
  (and (not ido-directory-nonreadable) (not ido-directory-too-big) (ido-make-file-list ido-default-item))
  (setq ido-ignored-list nil ido-cur-list (and (not ido-directory-nonreadable) (not ido-directory-too-big) (ido-make-file-list ido-default-item)))
  (cond (ido-keep-item-list (setq ido-keep-item-list nil ido-rescan nil)) ((eq ido-cur-item ...) (setq ido-ignored-list nil ido-cur-list ...)) ((eq ido-cur-item ...) (setq ido-ignored-list nil ido-cur-list ...)) ((eq ido-cur-item ...) (setq ido-ignored-list nil ido-cur-list ...)) ((eq ido-cur-item ...) (setq ido-ignored-list nil ido-cur-list ...)) (t nil))
  (while (not done) (ido-trace "\n_LOOP_" ido-text-init) (setq ido-exit nil) (setq ido-rescan t) (setq ido-rotate nil) (setq ido-text "") (when ido-set-default-item (setq ido-default-item ...) (if ... ...) (ido-trace "new default" ido-default-item) (if ido-default-item ...) (setq ido-set-default-item nil)) (if ido-process-ignore-lists-inhibit (setq ido-process-ignore-lists nil)) (if (and ido-use-merged-list ... ...) (let ... ... ...)) (cond (ido-keep-item-list ...) (... ...) (... ...) (... ...) (... ...) (t nil)) (setq ido-rotate-temp nil) (if ido-process-ignore-lists-inhibit (setq ido-process-ignore-lists t ido-process-ignore-lists-inhibit nil)) (ido-set-matches) (if (and ido-matches ...) (setq ido-try-merged-list t)) (let (... ... ... ... ... ... ...) (setq ido-exit nil) (setq ido-final-text ...)) (ido-trace "completing-read" ido-final-text) (if (get-buffer ido-completion-buffer) (kill-buffer ido-completion-buffer)) (ido-trace "\n_EXIT_" ido-exit) (cond (... ... nil) (... ...) (... ... nil) (... ...) (... ...) (... ...) (... ... ...) (... ... ...) (... ...) (t ... ...)))
  (let ((ido-cur-item item) (ido-entry-buffer ...) (ido-process-ignore-lists t) (ido-process-ignore-lists-inhibit nil) (ido-set-default-item t) ido-default-item ido-selected ido-final-text (done nil) (icomplete-mode nil) ido-cur-list ido-ignored-list (ido-rotate-temp nil) (ido-keep-item-list nil) (ido-use-merged-list nil) (ido-try-merged-list t) (ido-pre-merge-state nil) (ido-case-fold ido-case-fold) (ido-enable-prefix ido-enable-prefix) (ido-enable-regexp ido-enable-regexp)) (ido-setup-completion-map) (setq ido-text-init initial) (setq ido-input-stack nil) (run-hooks (quote ido-setup-hook)) (while (not done) (ido-trace "\n_LOOP_" ido-text-init) (setq ido-exit nil) (setq ido-rescan t) (setq ido-rotate nil) (setq ido-text "") (when ido-set-default-item ... ... ... ... ...) (if ido-process-ignore-lists-inhibit ...) (if ... ...) (cond ... ... ... ... ... ...) (setq ido-rotate-temp nil) (if ido-process-ignore-lists-inhibit ...) (ido-set-matches) (if ... ...) (let ... ... ...) (ido-trace "completing-read" ido-final-text) (if ... ...) (ido-trace "\n_EXIT_" ido-exit) (cond ... ... ... ... ... ... ... ... ... ...)) ido-selected)
  ido-read-internal(file "Find file: " ido-file-history nil nil nil)
  (setq filename (ido-read-internal item (or prompt "Find file: ") (quote ido-file-history) (and ... buffer-file-name) nil initial))
  (let ((minibuffer-completing-file-name t)) (setq filename (ido-read-internal item ... ... ... nil initial)))
  (if filename nil (setq ido-saved-vc-hb vc-handled-backends) (let (...) (setq filename ...)))
  (unless filename (setq ido-saved-vc-hb vc-handled-backends) (let (...) (setq filename ...)))
  (let (ido-saved-vc-hb (vc-handled-backends ...) (ido-work-directory-index -1) (ido-work-file-index -1) (ido-find-literal nil)) (unless filename (setq ido-saved-vc-hb vc-handled-backends) (let ... ...)) (cond (... ...) (... ...) (... ...) (... ...) (... ...) (... ... ... ... ...) (... ... ...) (... ... ... ... ... ... ... ...) (... ... ... ... ... ... ...) (... ... ... ... ... ... ...) (filename ... ... ... ... ... ...)))
  (let ((ido-current-directory ...) (ido-context-switch-command switch-cmd) ido-directory-nonreadable ido-directory-too-big filename) (if (or ... ...) (setq filename t ido-exit ...) (setq ido-directory-nonreadable ... ido-directory-too-big ...)) (when (and ... ...) (let ... ... ...)) (let (ido-saved-vc-hb ... ... ... ...) (unless filename ... ...) (cond ... ... ... ... ... ... ... ... ... ... ...)))
  ido-file-internal(raise-frame)
  ido-find-file()
  call-interactively(ido-find-file)
  eval((call-interactively (quote ido-find-file)))
  command-line-1(("-eval" "(load \"ido.el\")" "-f" "ido-mode" "-f" "toggle-debug-on-error" "/sudo::/" "-eval" "(call-interactively 'ido-find-file)"))
  command-line()
  normal-top-level()



In GNU Emacs 23.0.50.1 (i486-pc-linux-gnu, GTK+ Version 2.12.5)
 of 2008-01-21 on elegiac, modified by Debian
 (emacs-snapshot package, version 1:20080120-1)
configured using `configure  '--build' 'i486-linux-gnu' '--host' 'i486-linux-gnu' '--prefix=/usr' '--sharedstatedir=/var/lib' '--libexecdir=/usr/lib' '--localstatedir=/var' '--infodir=/usr/share/info' '--mandir=/usr/share/man' '--with-pop=yes' '--enable-locallisppath=/etc/emacs-snapshot:/etc/emacs:/usr/local/share/emacs/23.0.50/site-lisp:/usr/local/share/emacs/site-lisp:/usr/share/emacs/23.0.50/site-lisp:/usr/share/emacs/site-lisp:/usr/share/emacs/23.0.50/leim' '--with-x=yes' '--with-x-toolkit=gtk' 'build_alias=i486-linux-gnu' 'host_alias=i486-linux-gnu' 'CFLAGS=-DDEBIAN -DSITELOAD_PURESIZE_EXTRA=5000 -g -O2''

Important settings:
  value of $LC_ALL: nil
  value of $LC_COLLATE: C
  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_AU.utf8
  locale-coding-system: utf-8
  default-enable-multibyte-characters: t

Major mode: Post

Minor modes in effect:
  xterm-mouse-mode: t
  shell-dirtrack-mode: t
  icomplete-mode: t
  partial-completion-mode: t
  show-paren-mode: t
  delete-selection-mode: t
  file-name-shadow-mode: t
  global-font-lock-mode: t
  font-lock-mode: t
  unify-8859-on-encoding-mode: t
  utf-translate-cjk-mode: t
  auto-compression-mode: t
  column-number-mode: t
  line-number-mode: t
  transient-mark-mode: t

Recent input:
ESC O A ESC O B ESC x r e p o r t SPC e m a c s SPC 
b u g RET

Recent messages:
Loading /etc/emacs/site-start.d/50python-docutils.el (source)...done
Loading /etc/emacs/site-start.d/50scsh.el (source)...done
Loading /etc/emacs/site-start.d/50w3m-el-snapshot.el (source)...done
Loading /etc/emacs/site-start.d/51debian-el.el (source)...done
Loading subst-ksc...done
Loading subst-gb2312...done
Loading subst-big5...done
Loading subst-jis...done
For information about GNU Emacs and the GNU system, type C-h C-a.
Modification-flag cleared

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Re: 23.0.50; ido-make-file-list error taking substring of ""

[Michael Albinus]

"Trent W. Buck" <trentbuck@gmail.com> writes:

> emacs -Q -nw  -eval '(load "ido.el")'  -f ido-mode  -f toggle-debug-on-error  /sudo::/  -eval "(call-interactively 'ido-find-file)"
>
> causes the following backtrace.  The immediate problem is
> `ido-make-file-list' trying to take the substring [0,1] of an empty
> string from its local variable `ido-temp-list'.  The same problem
> seems to occur for other TRAMP methods.

[...]

> In GNU Emacs 23.0.50.1 (i486-pc-linux-gnu, GTK+ Version 2.12.5)
>  of 2008-01-21 on elegiac, modified by Debian
>  (emacs-snapshot package, version 1:20080120-1)

This problem has been fixed on 2008-01-23. The next snapshot you install
shall be clean wrt this.

Best regards, Michael.