bug#3662: Possible problem with ido-completing-read

[Peter Milliken]

--text follows this line--

Please write in English if possible, because the Emacs maintainers

usually do not have translators to read other languages for them.

Your bug report will be posted to the emacs-pretest-bug@gnu.org mailing list.

Please describe exactly what actions triggered the bug

and the precise symptoms of the bug:

This bug is also present in Emacs 22.3. I am attempting to use

ido-completing-read in a defun and the function "hangs" at the prompt

i.e. it does no completion at all, it will not allow me to cancel the

command, or accept a string typed in followed by RET.

I have produced a small test function to attempt to minimise possible

problems on my part:

(defun test ()

  (interactive)

  (let ((a)(d)) 

    (setq d '("abc" "xyz" "abe" "def"))

    (setq a (ido-completing-read "prompt: " d))))

My *understanding* of reading the defun documentation is that I should

be able to type "a<TAB>" (at the prompt) and have a completion list of

"abc" and "abe" offered. But this does not happen, all I get is "a

TAB". If I hit C-g nothing happens, the prompt line remains at the

command line. I compiled the above with debug on and received the

following trace when I hit C-g:

Debugger entered--Lisp error: (quit)

  apply(debug error (quit))

  edebug(error (quit))

  signal(quit nil)

  edebug-signal(quit nil)

  signal(quit nil)

  keyboard-quit()

  call-interactively(keyboard-quit nil nil)

  completing-read("prompt: " (("dummy" . 1)) nil nil nil nil)

  byte-code("   \" lj\n & " [item prompt ido-text-init history completing-read ido-make-prompt (("dummy" . 1)) nil] 7)

  ido-read-internal(list "prompt: " nil nil nil nil)

  ido-completing-read("prompt: " ("abc" "xyz" "abe" "def"))

  (edebug-after (edebug-before 4) 6 (ido-completing-read "prompt: " (edebug-after 0 5 d)))

  (setq a (edebug-after (edebug-before 4) 6 (ido-completing-read "prompt: " ...)))

  (edebug-after (edebug-before 3) 7 (setq a (edebug-after ... 6 ...)))

  (let ((a) (d)) (edebug-after (edebug-before 1) 2 (setq d ...)) (edebug-after (edebug-before 3) 7 (setq a ...)))

  (edebug-after (edebug-before 0) 8 (let (... ...) (edebug-after ... 2 ...) (edebug-after ... 7 ...)))

  (lambda nil (edebug-after (edebug-before 0) 8 (let ... ... ...)))()

  edebug-enter(test nil (lambda nil (edebug-after (edebug-before 0) 8 (let ... ... ...))))

  edebug-enter(test nil (lambda nil (edebug-after (edebug-before 0) 8 (let ... ... ...))))

  test()

  call-interactively(test t nil)

  execute-extended-command(nil)

  call-interactively(execute-extended-command nil nil)

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'.

If you would like to further debug the crash, please read the file

c:/emacs/etc/DEBUG for instructions.

In GNU Emacs 23.0.95.1 (i386-mingw-nt5.1.2600)

 of 2009-06-20 on SOFT-MJASON

Windowing system distributor `Microsoft Corp.', version 5.1.2600

configured using `configure --with-gcc (3.4)'

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: ENA

  value of $XMODIFIERS: nil

  locale-coding-system: cp1252

  default-enable-multibyte-characters: t

Major mode: Emacs-Lisp

Minor modes in effect:

  show-paren-mode: t

  desktop-save-mode: t

  recentf-mode: t

  tooltip-mode: t

  tool-bar-mode: t

  mouse-wheel-mode: t

  menu-bar-mode: t

  file-name-shadow-mode: t

  global-font-lock-mode: t

  font-lock-mode: t

  blink-cursor-mode: t

  global-auto-composition-mode: t

  auto-composition-mode: t

  auto-encryption-mode: t

  auto-compression-mode: t

  column-number-mode: t

  line-number-mode: t

C-u <escape> C-x <escape> x t e s t <return> g a <tab> 

C-g <help-echo> <help-echo> <help-echo> <help-echo> 

<help-echo> <help-echo> <help-echo> <help-echo> <help-echo> 

<help-echo> <help-echo> <menu-bar> <help-menu> <se

nd-emacs-bug-report>

Recent messages:

Local value of py-indent-offset set to 2

Using the CPython shell

Fill column set to 80 (was 70) [9 times]

Wrote c:/usr/local/.emacs.desktop.lock

Desktop: 51 buffers restored.

Loading c:/usr/local/.session...done

For information about GNU Emacs and the GNU system, type C-h C-a.

Edebug: test

Go...

Entering debugger...