After using zlc, history in minibuffer will be unable to use.

[kuanyui]

When opening a minibuffer (ex:M-x), you can use [up/down] to get previous commands, directories, files....etc.

However zlc will make this function unable to work. When press M-x and [up/down], it appears "No buffer named Completions" or "Args out of range: 5, 20"...etc.

(I installed zlc by add these to my .emacs)

;;Zsh style completetion!
(add-to-list 'load-path "~/.emacs.d/lisps/emacs-zlc-master/")
(require 'zlc)
(let ((map minibuffer-local-map))
  ;;; like menu select
  (define-key map (kbd "<down>")  'zlc-select-next-vertical)
  (define-key map (kbd "<up>")    'zlc-select-previous-vertical)
  (define-key map (kbd "<right>") 'zlc-select-next)
  (define-key map (kbd "<left>")  'zlc-select-previous)
  ;;; reset selection
  (define-key map (kbd "C-c") 'zlc-reset)
  )

[mooz]

OK, I guess that the cause of your problem is in your .emacs file. Does your .emacs override the key definition of (kbd "<down>") and (kbd "<up>") in minibuffer-local-map? In other words, does it have settings like the following example?

(let ((map minibuffer-local-map))
  ;;; like menu select
    (define-key map (kbd "<down>") 'zlc-select-next-vertical)
    (define-key map (kbd "<up>") 'zlc-select-previous-vertical)
)

If your .emacs does have it, remove it. If doesn't, it's a problem in zlc.el. Try the latest zlc.el and check if the problem is solved.

Anyway, adding the following settings will solve your problem, though this is not a good way.

(let ((map minibuffer-local-map))
  (define-key map (kbd "<down>")  'next-history-element)
  (define-key map (kbd "<up>")    'previous-history-element)
  )

[kuanyui]

1. Sorry, I forgot to say that zlc's completion works well in C-x C-f, but have problems in other conditions, such as M-x.
2. No, my .emacs doesn't contain the setting like that at all. (though I don't sure if I've installed any .el related to this...)
3. Has zlc been updated in these 2 days? I don't know why I just downloaded latest zlc.el from Github and installed, (i) zlc became unusable at all (the highlight selected bar didn't appear.As press [up/down] it gets message like "Args out of range: 0, 5")... (ii) M-x history became unavailable, too.

[mooz]

Thanks for the detailed information.

No, my .emacs doesn't contain the setting like that at all.

I found a suspicious part in your setting that you showed on your first post. If your config include the following settings,

(let ((map minibuffer-local-map))
  ;;; like menu select
  (define-key map (kbd "<down>")  'zlc-select-next-vertical)
  (define-key map (kbd "<up>")    'zlc-select-previous-vertical)
  (define-key map (kbd "<right>") 'zlc-select-next)
  (define-key map (kbd "<left>")  'zlc-select-previous)
  ;;; reset selection
  (define-key map (kbd "C-c") 'zlc-reset)
  )

then, remove settings related to (kbd "<down>") and (kbd "<up>") as follows.

(let ((map minibuffer-local-map))
  ;;; like menu select
  (define-key map (kbd "<right>") 'zlc-select-next)
  (define-key map (kbd "<left>")  'zlc-select-previous)
  ;;; reset selection
  (define-key map (kbd "C-c") 'zlc-reset)
  )

Has zlc been updated in these 2 days?

The last update of zlc is about a month ago. It contains a change that breaks the backward-compatibility: now you have to enable the zlc explicitly after requiring it, as follows.

(require 'zlc)
(zlc-mode t)

So, in summary, I hope that by changing your zlc-related settings to the following one will solve your problem.

(add-to-list 'load-path "~/.emacs.d/lisps/emacs-zlc-master/")
(require 'zlc)
(zlc-mode t)
(let ((map minibuffer-local-map))
  ;;; like menu select
  (define-key map (kbd "<right>") 'zlc-select-next)
  (define-key map (kbd "<left>")  'zlc-select-previous)
  ;;; reset selection
  (define-key map (kbd "C-c") 'zlc-reset)
  )    

If it won't solve your problem, give me the following two additional information.

1. The result of M-x emacs-version (C-u M-x emacs-version at *scratch* bufffer to retrieve the result easily)
2. The value of minibuffer-local-map

[kuanyui]

Thank for patiently and detailed reply. A.After removing these two lines indeed solve "some" problems :

  (define-key map (kbd "<down>")  'zlc-select-next-vertical)
  (define-key map (kbd "<up>")    'zlc-select-previous-vertical)

But: (i) zlc's completions become quite inconvenient when vertically selecting. (ii) M-x still have problem when I press [left/right] for correcting mistakes.

B.

GNU Emacs 23.3.1 (x86_64-pc-linux-gnu, GTK+ Version 2.24.10) of 2012-09-22 on batsu, modified by Debian

minibuffer-local-map is a variable defined in `C source code'.
Its value is shown below.

  This variable is potentially risky when used as a file local variable.

Documentation:
Default keymap to use when reading from the minibuffer.

Value: (keymap
 (18 . helm-minibuffer-history)
 (3 . zlc-reset)
 (left . zlc-select-previous)
 (right . zlc-select-next)
 (S-tab . zlc-select-previous)
 (backtab . zlc-select-previous)
 (menu-bar keymap
           (minibuf "Minibuf" keymap
                    (previous menu-item "Previous History Item" previous-history-element :help "Put previous minibuffer history element in the minibuffer")
                    (next menu-item "Next History Item" next-history-element :help "Put next minibuffer history element in the minibuffer")
                    (isearch-backward menu-item "Isearch History Backward" isearch-backward :help "Incrementally search minibuffer history backward")
                    (isearch-forward menu-item "Isearch History Forward" isearch-forward :help "Incrementally search minibuffer history forward")
                    (return menu-item "Enter" exit-minibuffer :key-sequence "
" :help "Terminate input and exit minibuffer")
                    (quit menu-item "Quit" abort-recursive-edit :help "Abort input and exit minibuffer")
                    "Minibuf"))
 (10 . exit-minibuffer)
 (13 . exit-minibuffer)
 (7 . abort-recursive-edit)
 (C-tab . file-cache-minibuffer-complete)
 (9 . self-insert-command)
 (up . zlc-select-previous-vertical)
 (prior . previous-history-element)
 (down . zlc-select-next-vertical)
 (next . next-history-element)
 (27 keymap
     (114 . previous-matching-history-element)
     (115 . next-matching-history-element)
     (112 . previous-history-element)
     (110 . next-history-element)))

C. And I just found a slightly strange repeatable (at least with my Emacs)...question(?), which I don't know if it make sense for debugging.

1. Quit Emacs.
2. Run Emacs.
3. C-x C-f [up/down] => save-current-buffer: No buffer named *Completions* (After this, [Tab] cannot use and echo "Args out of range: 0, 14")
4. C-g C-g C-g
5. C-x C-f [left/right] =>zlc--do-select: Args out of range: 0, 14 (After this, [Tab] cannot use and echo "Args out of range: 0, 14", too.)
6. C-g C-g C-g
7. C-x C-f [Tab] => completions list appears, zlc works perfect (and [up/down/left/right] are ok).
8. C-g C-g C-g` 
9. C-x C-f [up/down] =>Strangly, minibuffer output the results in the order of the completions list, instead of history.

[kuanyui]

Well...I upgrade my Emacs23 to 24.2, but this question still exist. I've disabled zlc.el temporarily at first. Nevertheless, I realized soon that I can't bear an Emacs without zlc.el (汗...)

So I enabled zlc.el, adding following to .emacs

(define-key minibuffer-local-must-match-map "\C-p" 'previous-history-element)
(define-key minibuffer-local-must-match-map "\C-n" 'next-history-element)
(define-key minibuffer-local-completion-map "\C-p" 'previous-history-element)
(define-key minibuffer-local-completion-map "\C-n" 'next-history-element)
(define-key minibuffer-local-map "\C-p" 'previous-history-element)
(define-key minibuffer-local-map "\C-n" 'next-history-element)

...And [up/down/left/right] are used in zlc completions; [C-p/M-p/C-n/M-n] in history.

This is absolutely not a good or smart solution, but it works at least. =w="

(By the way, I've try Icicles.el, but I dislike its overdone "enhancement" which lack of customizing spaces. For example, M-x cannot use history at all, it become "M-x M-h")

[mooz]

OK, I think I understand your problem; You want arrow keys (<up>, <down>, <left>, and <right>) to behave in minibuffer

• as original minibuffer behavior (e.g., history-selection), if completion lists are not displayed, and
• as zlc selection movement, if completion lists are displayed.

This is a missing feature for current zlc.el, and I think it should be implemented.

I'll tackle with this issue by making zlc-minor-mode. Wait for further reports :pray:

[TheJJ]

How's this going? I just ran into the same issue.